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GRUPO
DE TÉCNICAS
COMPUTACIONALES
EN LA INGENIERÍA
UNIVERSIDAD de MÁLAGA
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COMPUTATIONAL TECHNIQUES IN
ENGINEERING RESEARCH TEAM
MÁLAGA UNIVERSITY
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Chorros Líquidos Anulares
(Annular Liquid Jets)
Annular liquid jets are thin sheets of liquid falling under gravity
which, under certain conditions, merge in the centerline to become round
liquidjets (Figure 1). The volume enclosed by annular liquid jets has been
proposed as a chemical reactor for scrubbing of radioactive and non-radioactive
materials, burning of toxic wastes, reduction of zirconium from zirconium
tetrachloride and sodium, etc., because the liquid jet contains the reaction
and the gases generated in, for example, the combustion of toxic wastes
may be absorbed by the liquid which may be collected, purified and recycled
so that the combustion-generated gases do not flow through the jet's outer
interface and, therefore, do not pollute the environment.
Figure 1. Schematic of an annular liquid jet
Most previous studies of annular liquid jets have been concerned with
the analysis of their fluid dynamics and heat/mass transfer under steady
state conditions by assuming that the axial velocity component of the liquid
is governed by Torricelli's free-fall formula since the geometry of the
jet is curvilinear. Moreover, studies on mass transfer in annular liquid
jets have taken profit of the fact that the binary diffusion coefficient
of gases in liquids is much smaller than that of gases; as a consequence,
mass absorption by annular liquid jets is a rather slow process, and the
decrease or growth that the volume enclosed by the annular liquid jet experiences
due to the mass absorbed by the liquid is mainly controlled by the mass
of the gases generated by the combustion of toxic wastes.
When the volume enclosed by annular liquid jets is used to burn toxic
wastes, in addition to the absorption of the gaseous combustion products
by the liquid, one must account for the heat exchanges between this volume
and the jet. However, since the heat diffusion coefficient in the liquid
is much larger than the mass diffusion coefficient of the gases absorbed
by the liquid, it is to be expected that liquid jet absorb the heat at
a faster rate than the gaseous combustion products and, as a consequence,
the combustion of toxic wastes in the volume enclosed by annular liquid
jets is characterized by four time scales: the characteristic residence
time which depends on the liquid volumetric flow rate, the characteristic
reaction time, and the characteristic times for heat and mass absorption
by the liquid. Since the latter is much larger than the other three, one
may assume that mass absorption is a quasi-steady phenomenon. Moreover,
if the liquid does not absorb the heat at a sufficiently large rate, the
heating of the gases enclosed by the annular jet will increase their temperature,
pressure and volume; therefore, under these conditions, the curvilinear
geometry of the annular liquid jet will be a function of time. We are thus
faced with a free-surface problem, i.e., the annular liquid jet, which
affects and is affected by the combustion of the toxic wastes that it encloses.
Miembros del Grupo (Team Members)
-
J. I. Ramos (Supervisor) (1990-present)
-
F.R. Villatoro (1993-present)
-
C.M. García-López (1994-present)
Publicaciones (PAPERS)
Libros (Books)
J. I. Ramos, "Modelli Termodinamici
dei Motori ad Accensione Commandata e Diesel," Dipartimento di Ingegneria
Meccanica, II Universita di Roma "Tor Vergata," Roma, Italia, Mayo 1988.
(v+238 pp). (El texto del libro está escrito en inglés).
J. I. Ramos, Internal
Combustion Engine Modeling, Hemisphere Publishing
Corporation, New York, 1989. (xiv+422 pp).
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Capítulos de libros (Chapters
in books)
J. I. Ramos, "Finite Element
Methods for One-Dimensional Flame Propagation Problems," Numerical Modeling
in Combustion, editado por T. J. Chung, Capítulo 1, pp. 3-131,
Taylor & Francis, Washington, D.C., 1993. (Invitado).
J. I. Ramos, "Finite Difference
Methods for Turbulent Chemically Reacting Flows," Numerical Modeling
in Combustion, editado por T. J. Chung, Capítulo 5, pp. 281-373,
Taylor & Francis, Washington, D.C., 1993. (Invitado).
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Artículos en Revistas Internacionales
(Papers in Journals)
J. I. Ramos, "Finite Element
Methods for One-Dimensional Combustion Problems," International Journal
for Numerical Methods in Fluids, Vol. 11, No. 6, pp. 893–906, 1990.
(Invitado).
J. I. Ramos, N. S. Winowich,
"Finite Difference and Finite Element Methods for MHD Channel Flows," International
Journal for Numerical Methods in Fluids, Vol. 11, No. 6, pp. 907–934, 1990.
(Invitado).
J. I. Ramos, "Analytical,
Asymptotic and Numerical Studies of Liquid Curtains, and Comparisons with
Experimental Data," Applied Mathematical Modelling, Vol. 14, No. 4, pp.
170–183, 1990.
J. I. Ramos, R. Pitchumani,
"Liquid Curtains-II. Gas Absorption," Chemical Engineering Science, Vol.
45, No. 6, pp. 1595–1604, 1990.
J. I. Ramos, "Annular Liquid
Jets in Zero Gravity," Applied Mathematical Modelling, Vol. 14, No. 12,
pp. 630–640, 1990.
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J. I. Ramos, "Dynamic Response
of Liquid Curtains to Time-Dependent Pressure Fluctuations," Applied Mathematical
Modelling, Vol. 15, No. 3, pp. 126–135, 1991.
J. I. Ramos, R. Pitchumani,
"Dynamics of Liquid Membranes. I: Non-Adaptive Finite Difference Methods,"
International Journal for Numerical Methods in Fluids, Vol. 12, No. 9,
pp. 859-879, 1991.
J. I. Ramos, "Dynamics
of Liquid Membranes. II: Adaptive Finite Difference Methods," International
Journal for Numerical Methods in Fluids, Vol. 12, No. 9, pp. 881-894, 1991.
J. I. Ramos, "Mass Absorption
by Annular Liquid Jets: I. Analytical and Numerical Studies using the von
Mises Transformation", International Journal of Numerical Methods for Heat
and Fluid Flow, Vol. 1, No. 2, pp. 99-120, 1991. (Invitado).
J. I. Ramos, "Mass Absorption
by Annular Liquid Jets: II. Analytical and Numerical Studies using a Linear
Mapping", International Journal of Numerical Methods for Heat and Fluid
Flow, Vol. 1, No. 2, pp. 121-141, 1991. (Invitado).
J. I. Ramos, "Adaptive
and Nonadaptive Hermitian Operator Methods for Combustion Phenomena", Computer
Methods in Applied Mechanics and Engineering, Vol. 90, pp. 609-630, 1991.
J. I. Ramos, J. Falgueras,
"Response of Annular Liquid Jets to Mass Loading", Computational Mechanics,
Vol. 9, No. 1, pp. 1-16, 1991.
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J. I. Ramos, "Mass Absorption
by Annular Liquid Jets: III. Numerical Studies of Jet Collapse", International
Journal of Numerical Methods for Heat and Fluid Flow, Vol. 2, No. 1, pp.
21-36, 1992. (Invitado).
J. I. Ramos, J. Falgueras,
"Oscillating Annular Liquid Membranes", Archive of Applied Mechanics, Vol.
62, pp. 43-52, 1992.
J. I. Ramos, "Adaptive
Finite Difference Methods for Liquid Membranes", International Journal
for Numerical Methods in Engineering, Vol. 34, No. 3, pp. 823-836, 1992.
J. I. Ramos, "Adaptive
Block-Implicit Methods for Annular Liquid Jets", Applied Mathematical Modelling,
Vol. 16, pp. 464-475, 1992.
J. I. Ramos, "Annular
Liquid Jets: Formulation and Steady State Analysis", Zeitschrift für
Angewandte Mathematik und Mechanik (ZAMM), Vol. 72, No. 11, pp. 565-589,
1992.
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J. I. Ramos, "Domain-Adaptive
Finite Difference Methods for Collapsing Annular Liquid Jets,"Computational
Mechanics: An International Journal, Vol. 11, No. 1, pp. 28-64,1993.
J. I. Ramos, "Adaptive
Methods of Lines for One-Dimensional Reaction-Diffusion Equations," International
Journal for Numerical Methods in Fluids, Vol. 16, No. 8, pp. 697-723,
30 April 1993.
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I. Molina-Fernández,
C. Camacho-Peñalosa and J. I. Ramos, "Application of the Two-Dimensional
Fourier Transform to Nonlinear Wave Propagation Phenomena," IEEE Transactions
on Microwave Theory and Techniques, Vol. 42, No. 6, pp. 1079-1085, 1994.
J. I. Ramos and F. R. Villatoro,
"Forces on Solitons in Finite, Nonlinear, Planar Waveguides," Microwave
and Optical Technology Letters, Vol. 7, No. 8, pp. 378-381, 1994.
J. I. Ramos and F. R. Villatoro,
"A Quantum Mechanics Analogy for the Nonlinear Shrödinger Equation
in the Finite Line," Computers & Mathematics with Applications: An
International Journal, Vol. 28, No. 4, p. 3-17, 1994.
J. I. Ramos and F. R. Villatoro,
"Classical Forces on Solitons in Finite and Infinite, Nonlinear, Planar
Waveguides," Microwave and Optical Technology Letters, Vol. 7, No. 13,
pp. 620-625, September 1994.
J. I. Ramos and F. R. Villatoro,
"The Nonlinear Shrödinger Equation in the Finite Line," Mathematical
and Computer Modelling : An International Journal, Vol. 20, No. 3,
pp. 31-59, 1994.
J. I. Ramos, "Hopf Bifurcation
in Mass Transfer with Sievert's Solubility Law," Mathematical and Computer
Modelling: An International Journal, Vol. 20, No. 3, pp. 61-72, 1994.
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J. I. Ramos, "On the Growth
of Underpressurized Annular Liquid Jets," Applied Mathematical Modelling,
Vol. 19, No. 1, pp.13-25, 1995.
J. I. Ramos, "Asymptotic
Methods for the Analysis of Wave Propagation in Nonlinear, Lossless Transmission
Lines and Equivalent Circuits," Microwave and Optical Technology Letters,
Vol. 8, No. 4, pp. 186-193, March 1995.
J. I. Ramos, "Isothermal
Mass Transfer in Annular Liquid Jets with Sievert's Solubility Law," Archive
of Applied Mechanics, Vol. 65, pp. 260-269, 1995.
J. I. Ramos, "Hopf Bifurcation
in Annular Liquid Jets with Mass Transfer", International Journal for Numerical
Methods in Fluids, Vol. 20, No. 12, pp. 1293-1314, 30 June 1995.
J. I. Ramos, "One-Dimensional,
Time-Dependent, Homogeneous, Two-Phase Flow in Volcanic Conduits", International
Journal for Numerical Methods in Fluids, Vol. 21, No. 3, pp. 253-278, 1995.
J. I. Ramos, "Fluid Dynamics
of Slender, Thin, Annular Liquid Jets", International Journal for Numerical
Methods in Fluids, Vol. 21, No. 9, pp.735-761, 1995.
J. I. Ramos, "The Effects
of Fluctuating Body Forces on Annular Liquid Jets," Archive of Applied
Mechanics, Vol. 65, pp. 548-563, 1995.
J. I. Ramos, "The Effects
of the Solubility Law on Mass Transfer in Annular Liquid Jets" Chemical
Engineering Communications, Vol. 139, pp.137-157, 1995.
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J. I. Ramos, "Inviscid, Slender,
Annular Liquid Jets", Chemical Engineering Science, Vol. 51, No. 6, pp.
981-994, 1996.
J. I. Ramos and C. M. García-López,
"Linearized q-Methods: I. Ordinary Differential Equations," Computer Methods
in Applied Mechanics and Engineering, Vol. 129, pp. 255-269, 1996.
J. I. Ramos, "Planar Liquid
Sheets at Low Reynolds Numbers" International Journal for Numerical Methods
in Fluids, Vol. 22, pp. 961-978, 1996.
J. I. Ramos, "Upward and
Downward Annular Liquid Jers: Conservation Properties, Singularities and
Numerical Errors," Applied Mathematical Modelling, Vol. 20, No. 6,
pp. 440-458, 1996.
C. M. García-López
and J. I. Ramos, "A Piecewise-Linearized Method for Ordinary Differential
Equations: Two-Point Boundary-Value Problems," International Journal for
Numerical Methods in Fluids, Vol. 22, pp. 1089-1102, 1996.
J. I. Ramos, "G-Jitter
Effects on Mass Transfer in Annular Liquid Jets," International Journal
of Numerical Methods for Heat and Fluid Flow, Vol. 6, No. 5, pp. 17-28,
1996.
J. I. Ramos, "Force Fields
on Inviscid, Slender, Annular Liquid Jets," International Journal for Numerical
Methods in Fluids, Vol. 23, pp. 221-239, 1996.
J. I. Ramos, "One-Dimensional
Models of Steady, Inviscid, Annular Liquid Jets," Applied Mathematical
Modelling, Vol. 20, No. 8, pp. 593-607, 1996.
J. I. Ramos, "Irrotational,
Annular Liquid Jets," Journal of Mathematical Analysis and Applications,
Vol. 202, pp. 538-554, 1996.
C. M. García-López
and J. I. Ramos, "Linearized q-Methods: II. Reaction-Diffusion Equations,"
Computer Methods in Applied Mechanics and Engineering, Vol. 137, pp. 357-378,
1996.
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J. I. Ramos, "Asymptotic
and Numerical Analysis of Vertical, Planar Liquid Sheets subject to London-van
der Waals Forces," International Journal of Numerical Methods for Heat
and Fluid Flow, Vol. 7, No. 1, pp. 2 and 42-62, 1997.
J. I. Ramos, "The Effect
of Surfactants on the Growth of Underpressurized, Annular Liquid Jets"
Chemical Engineering Communications, Vol. 160, pp. 157-174, 1997.
J. I. Ramos, "A Non-Standard
Finite Difference Method for the One-Dimensional Advection Equation in
Cylindrical-Polar Coordinates," Applied Mathematical Modelling, Vol. 21,
pp. 337-338, 1997.
J. I. Ramos, "Mass Transfer
in Annular Liquid Jets in the Presence of Liquid Flow Rate Fluctuations,"
Applied Mathematical Modelling, Vol. 21, pp. 363-369, 1997.
J. I. Ramos, "Lumped Models
of Gas Bubbles in Thermal Gradients," Applied Mathematical Modelling, Vol.
21, pp. 371-386, 1997.
J. I. Ramos and C. M. García-López,
"Piecewise-Linearized Methods for Initial-Value Problems," Applied Mathematics
and Computation, Vol. 82, Nos. 2&3, pp. 273-302, 1997.
J. I. Ramos and C. M. García-López,
"Non-Standard Finite Difference Methods for Ode's and 1-D Pde's based on
Piecewise Linearization," Applied Mathematics and Computation, Vol.
86, No. 1, pp. 11-36, 1997.
J. I. Ramos and C. M. García-López,
"Short Communication: Comments on a Recent Paper dealing with the Finite-Analytic
Method," International Journal of Numerical Methods for Heat and Fluid
Flow, Vol. 7, No. 8, pp. 776 and 794-800, 1997.
J. I. Ramos, "Linearization
Methods for Reaction-Diffusion Equations: 1-D Problems," Applied Mathematics
and Computation, Vol. 88, Nos. 2&3, pp. 199-224, 1997.
J. I. Ramos, "Linearization
Methods for Reaction-Diffusion Equations: Multidimensional Problems," Applied
Mathematics and Computation, Vol. 88, Nos. 2&3, pp. 225-254, 1997.
J. I. Ramos, "Analysis
of Annular Liquid Membranes and Their Singularities," Meccanica, Vol. 32,
pp. 279-293, 1997.
J . I. Ramos, "Magma Ascent in
Volcanic Conduits," Acta Vulcanologica, Vol. 9, Nos. 1/2, pp. 157-166,
1997.
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J. I. Ramos, "Upstream
Boundary Conditions for Flows in Porous Channels," Applied Mathematics
and Computation, Vol. 93, No. 3, pp. 149-154, 1998.
J. I. Ramos, "A Piecewise
Time-Linearized Method for the Logistic Differential Equation," Applied
Mathematics and Computation, Vol. 93, No. 3, pp. 139-148, 1998.
J. I. Ramos, "Implicit,
Compact, Linearized q-Methods with Factorization for Multidimensional Reaction-Diffusion
Equations," Applied Mathematics and Computation, Vol. 94, No. 1, pp. 17-43,
1998.
J. I. Ramos, "Maps of Implicit,
Linearized q-Methods for the Logistic Differential Equation," Applied Mathematics
and Computation, Vol. 94, No. 1, pp. 1-15, 1998.
J. I. Ramos and C. M. García-López,
"Intermediate Boundary Conditions in Operator-Splitting Techniques and
Linearization Methods," Applied Mathematics and Computation, Vol.
9, No. 3, pp. 113-136, 1998.
J. I. Ramos, "Annular Liquid
Jets and Other Axisymmetric Free-Surface Flows at High Reynolds Numbers,"
Applied Mathematical Modelling , Vol. 22, No. 6, pp. 423-452, 1998.
J. I. Ramos, "Short Note:
Leading-Order Equivalence of Two Formulations for Long, Annular Liquid
Membranes," Applied Mathematical Modelling , Vol. 22, No. 6, pp. 453-457,
1998.
J. I. Ramos, "An adaptive
method for heat transfer in annular liquid jets," International Journal
of Computational Fluid Dynamics , in press, 1998.
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F.R.Villatoro and J.I.
Ramos, "On the method of modified equations. I: Asymptotic analysis of
the Euler forward difference method", Applied Mathematics and Computation.
in press, 1999.
F.R. Villatoro and J.I.
Ramos, "On the method of modified equations. II: Numerical techniques based
on the equivalent equation for the Euler forward difference method", Applied
Mathematics and Computation. in press, 1999.
F.R. Villatoro and J.I.
Ramos, "On the method of modified equations. III: Numerical techniques
based on the second equivalent equation for the Euler forward difference
method", Applied Mathematics and Computation. in press, 1999.
F.R. Villatoro and J.I.
Ramos, "On the method of modified equations. IV: Numerical techniques based
on the modified equation for the Euler forward difference method", Applied
Mathematics and Computation. in press, 1999.
F.R. Villatoro and J.I.
Ramos, "On the method of modified equations. V: Asymptotic analysis of
and direct-corrections and asymptotic successive-corrections techniques
for the implicit midpoint method", Applied Mathematics and Computation.
in press, 1999.
F.R. Villatoro and J.I.
Ramos, "On the method of modified equations. VI: Asymptotic analysis of
and asymptotic successive-corrections techniques for two-point, boundary-value
problems in ODE's", Applied Mathematics and Computation. in press, 1999.
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Artículos en Libros Editados
(Papers in Edited Books)
C. H. Berman, J. I. Ramos,
"Computation of Turbulence Noise," Computational Acoustics: Volume 2: Scattering,
Gaussian Beams, and Aeroacoustics, editado por D. Lee, A. Cakmak y R. Vichnevetsky,
pp. 242–251, North-Holland, Amsterdam, The Netherlands, 1990.
J. I. Ramos, "Methods of
Lines for One-Dimensional Combustion Problems", Athens Interdisciplinary
Olympia 91, First International Symposium on Methods of Lines, Surfaces
and Dimensional Reduction in Computational Mathematics and Mechanics, Athens,
Greece, 11–16 Noviembre 1991 (en prensa). (Invitado). (61 pp).
J. I. Ramos, "Domain-Adaptive
Methods of Lines for Inviscid Annular Liquid Jets", Athens Interdisciplinary
Olympia 91, First International Symposium on Methodsof Lines, Surfaces
and Dimensional Reduction in Computational Mathematics and Mechanics, Athens,
Greece, 11–16 Noviembre 1991 (en prensa). (Invitado). (98 pp).
J. I. Ramos, "Simulation
of Global Volcanic Systems: Numerical and Computer Implementation Challenges,"
Prospects for the Simulation of Volanic Eruptions, eds. F. Dobran and F.
Mulargia, pp. 57-60, Gardini, Pisa, Italy, Noviembre 1991.
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J. I. Ramos and F. Dobran,
"Section 4. Magma Ascent Model Development; Section 4.1. Modeling Strategy;
Section 4.2. Completed Implementation of Magma Ascent Model," pp. 71-79
and 81-108, in F. Dobran, Global Volcanic Simulation, Volume 2: Magma and
Lava Flow Modeling and Volcanic System Definition aimed at Hazard Assessment
at Etna, Giardini, Pisa, Italy, January 1994.
J. I. Ramos, "Section 5.
Lava Model Development; Section 5.4. Global Lava Flow Model," pp. 115,
and 117-127, in F. Dobran, Global Volcanic Simulation, Volume 2: Magma
and Lava Flow Modeling and Volcanic System Definition aimed at Hazard Assessment
at Etna, Giardini, Pisa, Italy, January 1994.
J. I. Ramos, "The Fluid
Dynamics of Thin Annular Liquid Jets," in Current Topics in the Physics
of Fluids, Vol. 1, pp. 75-121, edited by The Council of Scientific Information,
Kaithamukku, Trivandrum, India, 1994. (Invitado).
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Luis F. Romero, E. L. Zapata
and J. I. Ramos, "Parallel Computing of Semiconductor Laser Equations,"
Proceedings of the Eighth SIAM Conference on Parallel Processing for Scientific
Computing, 8 pp., CDROM ISBN 0-89871-395-1, SIAM, Philadelphia, Pennsylvania,
1997. Also, Book of Abstracts, Session CP2: Applications I, Paper CP02,
p. 26, Minneapolis, Minnesote, 14-17 March 1997.
Luis F. Romero, E. L. Zapata
and J. I. Ramos, "Nonlinear Dynamics of Semiconductor Laser Arrays," Fourth
SIAM Conference on Applications of Dynamical Systems, Book of Abstracts,
p. 39, Snowbird, Utah, 18-22 May 1997.
J. I. Ramos, "Two-Dimensional
Simulations of Magma Ascent in Volcanic Conduits," Numerical Methods for
Laminar and Turbulent Flow, Volume 10, Proceedings of the Tenth International
Conference, edited by C. Taylor and J. T. Cross, pp. 989-1000, Pineridge
Press, Swansea, United Kingdom, 1997.
J. I. Ramos, "Iterative
Factorization Techniques for Multidimensional Reaction-Diffusion Equations,"Fifteenth
IMACS World Congress on Scientific Computation, Modelling and Applied Mathematics.
Volume 3: Computational Physics, Chemistry and Biology, edited by Achim
Sydow, pp. 651-656, Wissenschaft & Technik Verlag, Berlin, Germany,
1997.
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J. I. Ramos, "Exact-Factorization,
Compact Methods for Multidimensional Heat Transfer: Application to Combustion,"
CHT'97: Advances in Computational Heat Transfer, Proceedings of a Symposium
organized by the International Centre of Heat and Mass Transfer, Cesme,
Turkey, 26-30 May 1997, edited by Graham de Vahl Davis and Eddie Leonardi,
pp. 176-183, Begell House, Inc., New York, 1998.
J. I. Ramos, "An Adaptive
Method for Heat Transfer in Annular Liquid Jets," CHT'97: Advances in Computational
Heat Transfer, Proceedings of a Symposium organized by the International
Centre of Heat and Mass Transfer, Cesme, Turkey, 26-30 May 1997, edited
by Graham de Vahl Davis and Eddie Leonardi, pp. 673-680, Begell House,
Inc., New York, 1998.
J. I. Ramos, "Mass Transfer
in Annular Liquid Jets," International Symposium on Liquid-Liquid Two-Phase
Flow and Transport Phenomena, Antalya, Turkey, 3-7 November 1997, edited
by M. D. Maron, pp. 425-434, Begell House, Inc., New York, 1998.
E. Soler, J. I. Ramos and
J. M. Troya, "Domain-decomposition methods for nonlinear reaction-diffusion
equations," Book of Abstracts of Invited Lectures ans Short Communications,
Seventh International Colloquium on Numerical Analysis and Computer Science
with Applications, p. 123, Plovdiv, Bulgaria, 13-17 August 1998.
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Proceedings Internacionales
(Papers in Proceedings)
J. I. Ramos, "Adaptive
and Non-Adaptive Hermitian Operator Methods for Combustion Phenomena,"Second
World Congress on Computational Mechanics, Extended Abstracts of Lectures,
pp. 1031–1034, University of Stuttgart, Stuttgart, Federal Republic of
Germany, 27–31 Agosto 1990. (Invitado).
J. I. Ramos, "Lagrangian,
Characteristic and Adaptive Finite Difference Methods for Inviscid Liquid
Membranes,"Second World Congress on Computational Mechanics, Extended Abstracts
of Lectures, pp. 120–123, University of Stuttgart, Stuttgart, Federal Republic
of Germany, 27–31 Agosto 1990.
I. Molina-Fernández,
C. Camacho-Peñalosa, J. I. Ramos, "Analysis of the Formation and
Interaction of Solitons in Nonlinear Transmission Lines by means of a Harmonic
Balance Technique", Proceedings of the IEEE Mediterranean Electrotechnical
Conference, MELECON'91, edited by B. Zajc and F. Solina, Volume I, pp.
672-675, Ljubljana, Yugoslavia, 22–24 Mayo 1991.
J. I. Ramos, J. Falgueras,
E. Nava, "A Domain-Adaptive Block Bidiagonal Technique for Annular Liquid
Jets", IMACS'91, Proceedings of the Thirteenth IMACS World Congress on
Computation and Applied Mathematics, editado por R. Vichnevetsky y J. J.
H. Miller, Volume 2, pp. 902-903, IMACS, Trinity College, Dublin, Irlanda,
22–26 Julio 1991.
J. I. Ramos, I. Molina-Fernández,
C. Camacho-Peñalosa, "Interaction of Solitons in Nonlinear Transmission
Lines", Proceedings of the Third International Symposium on Recent Advances
in Microwave Technology (ISRAMT'91), editado por B. S. Rawat y K. K. Agarwal,
pp. 313-316, Reno, Nevada, 18–21 Agosto 1991.
J. I. Ramos, "Domain-Adaptive
Techniques for Two-Dimensional, Time-Dependent Chemically Reactive Flows,"
SIAM Fourth International Conference on Numerical Combustion, Abstract
Book, pp. 174-175, St. Petersburg Beach, 2-4 Diciembre 1991.
J.I. Ramos, "Soot, Radiation,
and Conjugate Heat Transfer in RQL and LPP Combustors," HSR Analytical
Combustion Research Workshop Proceedings, NASA Conference Publication 10095,
pp. 175-186, NASA Lewis Research Center, Cleveland, Ohio, 1991.
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J. I. Ramos and F. Dobran,
"Numerical Simulation of One-Dimensional Time-Dependent Flows in Volcanic
Conduits," Poster session, National Meeting of the Italian Volcanological
Society, Gruppo Nazionale per la Vulcanologia, Palermo, Italy, 4-6 April
1992.
J. I. Ramos, "Domain-Adaptive
Finite Difference Methods for Annular Liquid Jets", Symposium on Science
and Supercomputing, Winners of Cray Research, Inc.’s 1991 Research Awards,
Pittsburgh Supercomputing Center, Pittsburgh, Pennsylvania, 15 April 1992.
(Invitado).
I. Molina-Fernández,
C. Camacho-Peñalosa and J.I. Ramos, "Nonlinear Wave Propagation
in Transmission Lines," Proceedings of the URSI International Symposium
on Electromagnetic Theory, pp. 287-289, IEEE, Sydney, Australia,
17-20 Agosto 1992.
J. I. Ramos, "Lava Flow
Modeling applied to the Hazard Assessment at Etna," International Workshop
on European Laboratory Volcanoes, Poster, Aci Castello, Catania, Italy,
19-21 June 1994.
F. Dobran and J. I. Ramos,
"Two-Dimensional Magma Flow with Solidification and Melting in Volcanic
Conduits," International Workshop on European Laboratory Volcanoes, Poster,
Aci Castello, Catania, Italy, 19-21 June 1994.
J. I. Ramos, "Lava and
Magma Flow Modelling," Proceedings of the International Workshop on European
Laboratory Volcanoes, Aci Castello, Catania, Italy, 19-21 June 1994.
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L. F. Romero, E. L. Zapata
and J. I. Ramos, "Efficient Parallel Solution of a Semiconductor Laser
Array Dynamics Model," in High-Performance Computing and Networking, edited
by H. Liddell, A. Colbrook, B. Hertzberger and P. Sloot, Lectures Notes
in Computer Science, Vol. 1067, pp. 937-938, Springer-Verlag, Berlin, 1996.
L. F. Romero, E. L. Zapata
and J. I. Ramos, "Parallel Simulation of Semiconductor Laser Arrays," Supercomputacion
in Nonlinear and Disordered Systems: Algorithms, Applications and Architectures,
edited by Luis Vázquez, Francisco Tirado and Ignacio Martín,
pp. 335-342, World Scientific, Singapore, 1997.
Vuelta al índice
Vuelta al índice Publicaciones
Congresos Internacionales (International
Simposia)
J. I. Ramos, "Asymptotic
Methods and Adaptive Finite Difference Techniques for the Study of Combustion
in Heterogeneous Chemical Reactors," Simposio Internacional sobre "Modelado
de Sistemas en Oceanografía, Climatología y Ciencias Medioambientales:
Aspectos Matemáticos y Numéricos", Torremolinos, España,
24-26 Enero 1994. (Invitado).
J. I. Ramos, "Adaptive
Finite Difference Techniques for the Study of the Isothermal Combustion
of Toxic Wastes in Heterogeneous Chemical Reactors" en Modelado de
Sistemas en Oceanografía, Climatología y Ciencias Medioambientales:
Aspectos Matemáticos y Numéricos, editado por Antonio Valle
y Carlos Parés, pp. 111-122, Grupo de Análisis Matemático
Aplicado, Universidad de Málaga, Málaga, Spain, 1994. (Invitado).
C. M. García-López
and J. I. Ramos, "Linearized Finite Difference Methods: Application to
Nonlinear Heat Conduction Problems," Advanced Computational Methods in
Heat Transfer IV, edited by L. C. Wrobel, G. Comini, C. A. Brebbia and
A. J. Nowak, pp. 527-536, Computational Mechanics Publications, Southampton,
United Kingdom, 1996.
L. F. Romero, E. L. Zapata
and J. I. Ramos, "A Parallel q-Method for a Semiconductor Laser Array Model,"
Proceedings of the 8th Joint EPS-APS International Conference on Physics
Computing, pp. 325-328, eds. P. Borcherds, M. Bubak and A. Maksymowicz,
Academic Computer Center, CYFRONET-KRAKÓW, Kraków, Poland,
17-21 September 1996.
J. I. Ramos, "Exact-Factorization,
Compact Methods for Multidimensional Heat Transfer: Application to Combustion,"
International Symposium on Advances in Computational Heat Transfer,
Book of Abstracts, pp. 69-71, International Centre for Heat and Mass Transfer,
Cesme, Turkey, 26-30 May 1997.
J. I. Ramos, "An Adaptive
Method for Heat Transfer in Annular Liquid Jets," International Symposium
on Advances in Computational Heat Transfer, Book of Abstracts, pp.
191-193, International Centre for Heat and Mass Transfer, Cesme, Turkey,
26-30 May 1997.
J. I. Ramos, "Mass Transfer in Annular
Liquid Jets," International Symposium on Liquid-Liquid Two-Phase Flow and
Transport Phenomena, Book of Abstracts, pp. 93-94, International Centre
for Heat and Mass Transfer, Antalya, Turkey, 3-7 November 1997.
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Vuelta al índice Publicaciones
Congresos Nacionales (Spanish Simposia)
I. Molina Fernández,
J. I. Ramos, C. Camacho Peñalosa, "Circuitos no-lineales distribuidos
pasivos y sus modelos equivalentes continuos", Actas delVI Simposium Nacional
de la Unión Científica Internacional de Radio (URSI’91),
Volumen I, pp. 24-28, Cáceres, 24-27 Septiembre 1991.
I. Molina-Fernández,
C. Camacho-Peñalosa and J.I. Ramos, "Aplicación de la Transformada
de Fourier Bidimensional a Fenómenos de Propagación No-Lineal,"
Actas delVII Symposium Nacional de la Unión Científica Internacional
de Radio, eds. Carlos Camacho Peñalosa, Teresa M. Martín
Guerrero and Antonio Puerta Notario, Vol. II, pp. 762-765, Málaga,
Spain, 23-25 September 1992.
J.I. Ramos, "Métodos
de Diferencias Finitas y Elementos Finitos para el Estudio de Bombas Magnetohidrodinámicas,"
Actas del VII Symposium Nacional de la Unión Científica Internacional
de Radio, eds. Carlos Camacho Peñalosa, Teresa M. Martín
Guerrero and Antonio Puerta Notario, Vol. I, pp. 503-507, Málaga,
Spain, 23-25 September 1992.
I. Molina-Fernández,
C. Camacho-Peñalosa and J. I. Ramos, "Estudio de los Efectos introducidos
por la Discretización en el Análisis Numérico de Fenómenos
de Propagación No-Lineal," VIII Symposium Nacional de la Unión
Científica Internacional de Radio, Tomo I, pp. 630-634, Servicio
de Publicaciones, Universidad Politécnica de Valencia, Valencia,
Spain, 22-24 Septiembre 1993.
F. R. Villatoro and J.
I. Ramos, "Métodos Asintóticos para el Análisis de
Líneas de Transmisión No Lineales con Perdidas," Libro de
Actas, pp. 407-410, X Symposium Nacional de la Unión Científica
Internacional de Radio, Universidad de Valladolid, Valladolid, 27-29 Septiembre
1995.
C. M. García López,
J. I. Ramos and E. Márquez Segura, "Aplicación de los q-Métodos
Linealizados a la Simulación de Circuitos en el Dominio del Tiempo,"
Libro de Actas, pp. 907-910, X Symposium Nacional de la Unión Científica
Internacional de Radio, Universidad de Valladolid, Valladolid, 27-29 Septiembre
1995.
C. M. García López
and J. I. Ramos, "Métodos de Diferencias Finitas Linealizados y
su Aplicación al Estudio de Líneas de Transmisión
no Lineales," Libro de Actas, Vol. I, pp. 25-28, XI Symposium Nacional
de la Unión Científica Internacional de Radio, eds. J. M.
Páez Borrallo and J. I. Alonso Montes, Servicio de Publicaciones,
E. T. S. I. Telecomunicación, Universidad Politécnica de
Madrid, Madrid, 18-20 Septiembre 1996.
Diego J. Navarro,
Lawrence Mandow, y Francisco R. Villatoro, "Representación de Arboles
Mediante L-gramáticas y Sistemas de Partículas", Actas
del II Jornadas de Informática, (AEIA), Almuñecar (España)
, pp. 647-650, 1996.
Juan A. Falgueras
y Francisco R. Villatoro, "DeSolve:Un Paquete en Mathematica para la Resolucion
de Ecuaciones Diferenciales Ordinarias", Actas del I Congreso Mathematica
en España, Universidad de Valencia (España), pp. 91-101,
1996.
J. I. Ramos, "Perturbaciones
Periódicas de Bifurcaciones de Hopf en Chorros Anulares con Transferencia
de Masa," No-lineal 97, Book of Abstracts, Departamento de Física
Fundamental, U.N.E.D., 10-12 Abril 1997. (Invitado).
C. M. García López
and J. I. Ramos, "Propagación de solitones en guías de onda
con índice de refracción variable," Actas del XII Symposium
Nacional de la Unión Científica Internacional de Radio, Volumen
I, pp. 105-108, Iberdrola Instituto Tecnológico, Bilbao, Spain,
1997.
J. I. Ramos and F. R. Villatoro,
"Propagation of solitons and antisolitons associated with the sine-Gordon
equation in Josephson superconducting junctions," Actas del XII Symposium
Nacional de la Unión Científica Internacional de Radio, Volumen
I, pp. 109-112, Iberdrola Instituto Tecnológico, Bilbao, Spain,
1997.
Vuelta al índice
Vuelta al índice Publicaciones
Tesis Doctorales (Ph. D. Thesis)
-
Iñigo Molina Fernández, "Análisis de la Propagación
en Estructuras de Transmisión No-lineales mediante Discretización
Espacial y Balance Harmónico" (co-directores de la tesis: Carlos
Camacho Peñalosa y J. I. Ramos) 18 Marzo 1993 (Apto cum laudae)
-
Luis Felipe Romero Gómez, "Simulación Numérica
de Láseres de Semiconductores en Multiprocesadores" (co-directores
de la tesis: Emilio López Zapata y J. I. Ramos) 29 Noviembre 1996
(Apto cum laudae)
-
Carmen María García López, "Métodos de linealización
para la resolución numérica de ecuaciones diferenciales"
(director J. I. Ramos) 16 Octubre 1998 (Sobresaliente cum laudae)
-
Francisco Román Villatoro Machuca, "Métodos de ecuaciones
modificadas y técnicas de correccción asintótica para
ecuaciones diferenciales ordinarias" (director J. I. Ramos) 20 Noviembre
1998 (Sobresaliente cum laudae)
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Proyectos de Investigación
(Research Support)
-
"Dinámica no lineal de chorros líquidos anulares", Dirección
General de Investigación Científica y Técnica (DGICYT)
(PB91-0767) (BOE 19 Octubre 1991), 16 Julio 1992-15 Julio 1994, Director:
J. I. Ramos
-
"Grupo de Técnicas Computacionales en la Ingeniería"
(Ayuda a Grupos Consolidados, Grupo nº. 7066), Dirección
General de Universidades e Investigación, Consejería de
Educación y Ciencia, Junta de Andalucía (BOJA 5 Noviembre
1991), un año, Director: J. I. Ramos
-
"Magma and Lava Flow Modeling and Fine Structure and Plumbing
System Definition aimed at Volcanic Hazard Assessment at Etna", Commission
of the European Communities, Programa A.IV.1.2, CEC Contrato EV5V-CT52-0190,
1 Enero 1992-31 Diciembre 1994, Coordinador: Gruppo Nazionale per la Vulcanologia,
Universitá di Pisa, Pisa, Italia
-
"Grupo de Técnicas Computacionales en la Ingeniería" (Ayuda
a Grupos Consolidados, Grupo nº 7066), Dirección General
de Universidades e Investigación, Consejería de Educación
y Ciencia, Junta de Andalucía (BOJA 29 Julio 1993), 11 Julio 1994-10
Julio 1994, Director: J. I. Ramos
-
"Thermohydraulic Code Parallelization (PACOTE)", Commission of the European
Communities, Programa "Parallel Computing Iniative (PCI)", DG-III,
ESPRIT PROJECT : 9062A.IV.1.2, CEC Contrato EV5V-CT52-0190, 1 Febrero
1995-30 Junio 1996, Associated Contractors: TECNATOM, S.A. y Universidad
de Málaga (José María Troya Linero y Juan Ignacio
Ramos Sobrados)
-
"Dinámica, transferencia de masa y calor, y combustión
en chorros líquidos anulares", Dirección General de
Investigación Científica y Técnica (DGICYT)
(PB94-1494), 1 Julio 1995-1 Julio 1998, Director: J. I. Ramos
-
"Grupo de Técnicas Computacionales en la Ingeniería" (Ayuda
a Grupos Consolidados, Grupo nº TIC 0118), Dirección
General de Universidades e Investigación, Consejería de
Educación y Ciencia, Junta de Andalucía (BOJA 7 Junio 1995),
6 Febrero 1996-5 Febrero 1997, Director: J. I. Ramos
-
"Sistema Multiprocesador", Comisión Interministerial de Ciencia
y Tecnología (CICYT) (IN94-0406), Investigador Responsable:
E. López Zapata, Investigadores: J. I. Ramos, J. M.
Troya Linero, J. Quirante Sánchez, A. Conejo Navarro,
J. T. López Navarrete, C. M. Parés Madroñal y J. González
Jiménez
-
"Red de Datos ATM", Comisión Interministerial de Ciencia y Tecnología
(CICYT) (IN96-0240), Investigador Responsable: J. I. Ramos,
Investigadores: E. López Zapata, A. Conejo Navarro,
A. García Cerezo, J. J. Rodríguez Jiménez,
R. Fernández Feria y A. Simón Mata
-
"Fluidodinámica y solidificación de chorros líquidos
anulares compuestos", Comisión Interministerial de Ciencia
y Tecnología (CICYT) (PB97-1086), Investigador Responsable:
J. I. Ramos
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