Witek Alda, Academic Computer Center, CYFRONET, Krakow, Poland
Jeff Allwardt, Undergraduate Student Researcher
S. Balachandar, Department of Theoretical and Applied Mechanics, University of Illinois, Urbana, Illinois
Stephen Y. Bergeron, Quebec, Canada
John Boggs, Staff
Joy Branlund, Graduate Student Researcher
Doris Breuer, Wilhelms Universitaet, Munster, Germany
David Brunet, Institute of Planetary Physics, Toulouse, France
Lapo Bsochi, Department of Physics, Universita di Bologna, Bologna, Italy
Marian Bubak, Institute of Planetary Physics, Toulouse, France
Andrei Cadek, Department of Geophysics, Charles University, Praha, Czech Republic
Noä Cantin, CERCA, Montreal, Quebec, Canada
Josh Collins, Undergraduate Student Researcher
Derik Copus, Undergraduate Student Researcher
Tom Cortese, University of Illinois, Urbana, Illinois
Vera Cozelmann, Institut für Planetologie, Wilhelm Universitat, Minsk, Germany
Laszlo Cserepes, Geophysics Department, Eotvos University, Budapest, Hungary
Roelf Daessler, Project Group Thermodynamics, University of Potsdam, Potsdam, Germany
Jerry de Smet, Philips CFT, Eindhoven, The Netherlands
Fabien DuBuffett, Toluouse, France
Jennifer Dudley, Staff
Witold Dzwinel, Academic Computer Center, CYFRONET, Krakow, Poland
Bengt Fornberg, Program in Applied Mathematics, University of Colorado, Boulder, Colorado
Andrew Forsberg, Undergraduate Student Researcher
Paul Forsberg, Undergraduate Student Researcher
Hiromi Fujimoto, Research Center for Prediction of Earthquakes, Tohoku University, Japan
Muriel Gerbault, New Zealand Geological Survey, New Zealand
Dana Goodman, Undergraduate Student Researcher
Markus Haeri, Geologisches Institut, Zurich, Switzerland
Ulli Hansen, Institut für Geophysik, Universität Münster, Münster, Germany
Lada Hanyk, Department of Geophysics, Karlova University, Praha, Czech Republic
Stefan Hettel, Karlsruhe University, Karlsruhe, Germany
Cathy Hier, Graduate Student Researcher
Satoru Honda, Department of Earth and Planetary Systems, University of Hiroshima, Higashi-Hiroshima, Japan
Yoshihiro Itoh, Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota
Yasushi Iwase, Department of Earth Planetary Science Systems, University of Hiroshima, Higashi-Hiroshima, Japan
Kirk E. Jordan, IBM, Waltham, Massachusetts
Masanori Kameyama, Japan Marine Science and Technology Center, Kanagawa, Japan
Motoyuki Kido, Ocean Research Institute, University of Tokyo, Tokyo, Japan
Jacek Kitowski, Institute of Computer Science, University of Mining and Metallurgy, Krakow, Poland
Dimitri Komatits, Department of Earth Sciences, Harvard University, Cambridge, Massachusetts
Tine B. Larsen, Graduate Student Researcher
Gregory Lauer, Undergraduate Student Researcher
Connie Lausten, Undergraduate Student Researcher
Alison M. Leitch, Research Associate
Adrian Lenardic, Department of Earth and Space Sciences, University of California, Los Angeles, California
Minye Liu, Mason, Ohio
Melanee Lundgren, Staff
Renee Maheshwari, Undergraduate Student Researcher
Andrei Malevsky, Research Associate
Brendan Meade, Undergraduate Student Researcher
Steve Miller, Geological Institute, Swiss Federal Institute of Technology, Zurich, Switzerland
Dan Mistr, Department of Geophysics, Charles University, Prague, Czech Republic
Jacek Moscinski, Institute of Computer Science, Krakow, Poland
Klaus Nagel, Institut für Planetologie, University of Münster, Münster, Germany
Takashi Nakagawa, University of Tokyo, Tokyo, Japan
Tomeoki (Tommy) Nakakuki, Department of Earth and Planetary Systems Science, University of Hiroshima, Higashi-Hiroshima, Japan
Marian Noga, Institute of Computer Science, Krakow, Poland
Yasuo Onishi, Pacific Northwest National Laboratory, Richland, Washington
Elizaveta Pachepsky, Undergraduate Student Researcher
Yuri A.K. Podladchikov, Earth Sciences Institute, Zurich, Switzerland
Marek Pogoda, Academic Computer Center, Krakow, Poland
Alexei N.B. Poliakov, Laboratoire de Geophysique et Tectonique, Universite Montpellier II, Montpellier, France
Klaus Regenaure-Lieb, Hohentengen, Germany
Michael Riedel, GeoForschungsZentrum Potsdam, Projectgroup Thermodynamics, Potsdam, Germany
Kerri M. Root, Staff
James R. Rustad, Pacific Northwest National Laboratory, Richland, Washington
Stefan Schmalholz, Geologische Institute, Zurich, Switzerland
Bertram Schott, Department of Earth Sciences, Uppsala, Sweden
Brigit Schroeder, Undergraduate Student Researcher
Andrew R. Shallue, Supercomputing Institute Undergraduate Intern
Jamie Lynn Smedsmo, Undergraduate Student Researcher
Terri Smith, Staff
Tilman Spohn, Institute of Planetology, Westfalische Wilhelmsp Universitat Munster, Munster, Germany
Liz Starin, Undergraduate Student Researcher
Volker C. Steinbach, Institut fur Geophysik, Universitat Koln, Albertus Magnus Platz, Germany
Niki Strong, Graduate Student Researcher
Arkady Ten, Research Associate
Tom Tran, Undergraduate Student Researcher
Jerome Tromp, Department of Earth Sciences, Harvard University, Cambridge, Massachusetts
Arie P. van den Berg, Theoretical Geophysics Department, University of Utrecht, Utrecht, The Netherlands
Jerry van Hunen, Department of Geology, University of Utrecht, Utrecht, The Netherlands
Peter van Keken, Department of Geological Sciences, University of Michigan, Ann Arbor, Michigan
Oleg Vasilyev, Center for Turbulence Research, Stanford University, Stanford, California
Jean-Pierre Vilotte, I.P.G., Paris, France
Alain P. Vincent, CERCA, Montreal, Quebec, Canada
Evgeny Wasserman, Pacific Northwest National Laboratory, Richland, Washington
Thomas W. Wilson, Supercomputing Institute Undergraduate Intern
Tommy Yanagawa, Department of Earth and Planet Sciences, Kyushu University, Fukuoka, Japan
Shoichi Yoshioka, Department of Earth and Planetary Sciences, Kyushu University, Fukuoka, Japan
Hua-Wei Zhou, Geological Sciences, University of Houston, Houston, Texas
Rashid Zia, Supercomputing Institute Undergraduate Intern
Ruth Ziethe, University of Münster, Münster, Germany
99/11 |
"Fast Mechanisms for the Formation of New Plate Boundaries," K. Regenauer-Lieb and D.A. Yuen, University of Minnesota Supercomputing Institute Research Report UMSI 99/11, February 1999. Submitted for publication. |
99/12 |
"Dissipative Particle Dynamics of the Thin-Film Evolution in Mesoscale," W. Dzwinel and D.A. Yuen, Molecular Simulation, 22, p. 369 (1999). |
99/13 |
"Simulations Using Discrete Particles as a Natural Solver," W. Dzwinel, J. Kitowski, J. Moscinski, and D.A. Yuen, University of Minnesota Supercomputing Institute Research Report UMSI 99/13, February 1999. Submitted for publication. |
99/28 |
"Effects of a Realistic Mantle Thermal Conductivity on the Patterns of 3-D Convection," F. Dubuffet, D.A. Yuen, and M. Rabinowicz, University of Minnesota Supercomputing Institute Research Report UMSI 99/28, March 1999. Submitted for publication. |
99/38 |
"A Thick Pipe-Like Heat-Transfer Mechanism in the Lower-Mantle: Nonlinear Manifestation of 3-D Convection in Variable Thermal Conductivity," F. Dubuffet and D.A. Yuen, Geophysical Research Letters, 27, p. 17 (2000). |
99/39 |
"The Diversity of Tectonics from Fluid-Dynamical Modeling of the Lithosphere-Mantle System," B. Schott, D.A. Yuen, and H. Schmeling, University of Minnesota Supercomputing Institute Research Report UMSI 99/39, March 1999. Submitted for publication. |
99/39 |
"Viscous Heating: A Potential Mechanism for the Formation of the Ultra Low Velocity Zone," V. Steinbach and D.A. Yuen, University of Minnesota Supercomputing Institute Research Report UMSI 99/46, March 1999. Submitted for publication. |
99/46 |
"Dynamics of Plumes and Superplumes Governed by Mantle Phase Transitions and Variable Viscosity," D. Brunet and D.A. Yuen, University of Minnesota Supercomputing Institute Research Report UMSI 99/49, April 1999. |
99/49 |
"Visualization and Analysis of Mixing Dynamical Properties in Convecting Systems with Different Rheologies," A. Ten, D.A. Yuen, and Y.Y. Podladchikov, Electronic Geosciences, 4, p. 1 (1999). |
99/50 |
"Influence of Adiabatic Cooling/Heating on Rapidly Rotating Thermal Convection at finite Prandtl Number," Z. Mistr, C. Matyska, D.A. Yuen, University of Minnesota Supercomputing Institute Research Report UMSI 99/109, June 1999. |
99/109 |
"Fast Collapse of Passive Margins from Sediment Loading," J. Branlund, K. Regenauer-Lieb, and D.A. Yuen, University of Minnesota Supercomputing Institute Research Report UMSI 99/110, June 1999. |
99/110 |
"Criticality of Subducting Slabs," M.R. Riedel, S. Karato, and D.A. Yuen, University of Minnesota Supercomputing Institute Research Report UMSI 99/129, July 1999. Submitted for publication. |
99/129 |
"Using Discrete Particles as a Natural Solver in Simulating Multiple-Scale Phenomena," W. Dzwinel, W. Alda, J. Kitowski, and D.A. Yuen, University of Minnesota Supercomputing Institute Research Report UMSI 99/131, July 1999. Submitted for publication. |
99/131 |
"Thermal Evolution of Sedimentary Basin Formation with Variable Thermal Conductivity," L. Starin, D.A. Yuen, and S.Y. Bergeron, Geophysical Research Letters, 27, p. 265 (2000). |
99/135 |
"Exothermic and Endothermic Chemical Reactions Modelled with Molecular Dynamics," W. Alda, D.A. Yuen, H.P. Lüthi, and J.R. Rustad, University of Minnesota Supercomputing Institute Research Report UMSI 99/138, August 1999. Submitted for publication. |
99/138 |
"Exothermic and Endothermic Chemical Reactions Modelled with Molecular Dynamics," W. Alda, D.A. Yuen, H.P. Lüthi, and J.R. Rustad, University of Minnesota Supercomputing Institute Research Report UMSI 99/138, August 1999. Submitted for publication. |
99/144 |
"Feedback Effects of Variable Thermal Conductivity on the Cold Downwellings in high Rayleigh Number Convection," F. Dubuffet, D.A. Yuen, and T. Yanagawa, University of Minnesota Supercomputing Institute Research Report UMSI 99/144, August 1999. |
99/148 |
"Transition to Turbulent Thermal Convection beyond Ra=1010 Detected in Numerical Simulations," A.P. Vincent and D.A. Yuen, Physical Review E, 61, p. 5241 (2000). |
99/150 |
"Extended-Boussinesq Thermal-Chemical Convection with Moving Heat Sources and Variable Viscosity," U. Hansen and D.A. Yuen, University of Minnesota Supercomputing Institute Research Report UMSI 99/150, September 1999. Submitted for publication. |
99/151 |
"Matching Macroscopic Properties of Binary Fluids to the Interactions of Dissipative Particle Dynamics," W. Dzwinel and D.A. Yuen, International Journal of Modern Physics C, 11, p. 1 (2000). |
99/153 |
"Rayleigh-Taylor Instability in the Mesoscale Modelled by Dissipative Particle Dynamics," W. Dzwinel and D.A. Yuen, University of Minnesota Supercomputing Institute Research Report UMSI 99/153, September 1999. Submitted for publication. |
99/154 |
"A Two-Level, Discrete Particle Approach for Simulating Ordered Colloidal Structures," W. Dzwinel and D.A. Yuen, Journal of Colloid and Interface Science, 225, p. 179 (2000). |
99/185 |
"Looking at the Inside of the Earth with 3-D Wavelets: A Pair of New Glasses for Geoscientists," S.Y. Bergeron, D.A. Yuen, and A.P. Vincent, Electronic Geosciences[electronic journal, http://link.springer.de/link/service/journals/10069/bibs/0005001/00050003.htm], 5:3, p. Internet (2000). |
99/189 |
"Ultrafast Mantle Plumes and Implications for Flood Basalt Volcanism in the Northern Atlantic Region," T.B. Larsen, D.A. Yuen, and M. Storey, Tectonophysics, 311, p. 31 (1999). |
99/216 |
"Profiles of the Bullen Parameter from Mantle Convection Modelling," C. Matyska and D.A. Yuen, University of Minnesota Supercomputing Institute Research Report UMSI 99/207, November 1999. Submitted for publication. |
99/239 |
"Capabilities of 3-D Wavelet Transforms to Detect Plume-like Structures from Seismic Tomography," S.Y. Bergeron, D.A. Yuen, and A.P. Vincent, University of Minnesota Supercomputing Institute Research Report UMSI 99/216, November 1999. Submitted for publication. |
This research is geared directly toward a quantitative understanding of the Earth's interior from numerical modeling of complex physical-chemical and fluid-dynamical processes of time-dependent nature. These researchers are actively engaging in the area of scientific visualization, which becomes known as visual computing. Many of the complicated phenomena with fine features must be visualized in order to fully understand the nonlinear processes inherent in flow problems and to understand images from the Earth's mantle, imaged by seismic tomography, which is akin to the CATSCAN technique used in medical technology.
This computing approach is two-pronged. On both powerful multi-processor workstations of two to four GB memory and supercomputers of MPP variety, these researchers are studying complicated physical processes first with two-dimensional problems, which are CPU intensive but not memory intensive, in order to map out the parameter space of interest. A follow up is then made with large, high-resolution, three-dimensional convection and seismic models, which really demand the computational power and memory of the shared-memory architecture machines such as the IBM SP and the Origin 2000 systems. These researchers are taking advantage of the large memory capabilities by performing challenging time-dependent convection problems for both two- and three-dimensional configurations and by carrying out state-of-the-art calculations on micro hydrodynamical instabilities of multi-phase flow with molecular dynamics (MD) and dissipative particle dynamics (DPD).
Many different projects are being undertaken in this research. One focus is on large-scale computations of three-dimensional thermal convection with focus on both basic fluid dynamics and geophysical applications, such as the incorporation of phase changes, viscous dissipation, adiabatic heating, and temperature-dependent and non-Newtonian viscosity, and temperature- and pressure-dependent thermal conductivity for silicates. Further focus is being put on numerical simulations of two-dimensional convection problems with complex physics and chemistry, such as grain-size dependent rheology and plastic yield strength, variable thermal conductivity, and complicated boundary conditions, as applied to basic questions in fluid mechanics and applications in the evolution of planetary interiors. Finite-element modeling of thermomechanical evolution of the continental lithosphere and subduction process is also being pursued. Another study is being done on thermal evolution of the Earth and Mars by using detailed two-dimensional models and truncated three-dimensional models in a spherical geometry. Another area of study is on large-scale mixing by convective flows, shear flows with different rheologies present, and viscoelastic calculations by an adaptive wavelet transform technique and multifractal analysis studies of mixing processes of contaminated chemicals in nuclear waste tanks. Further investigation is done into large-scale regional visualization of seismic wave data and the interference of actual three-dimensional structures in the upper mantle by continuous wavelet transforms and scientific visualization of the phase gradients in satellite radar interferometric images. Finally, research is being done on large-scale molecular dynamics simulations of micro hydrodynamical phenomena in the range of 100 Å and thin-film problems with DPD as well as three-dimensional seismic wave propagation in a spherical Earth using the spectral-element technique.
All of the projects in this proposal have strong industrial importance for geophysical industries and government laboratories, such as the Batelle Environmental Molecular Science Lab in Richland, WA and the Jet Propulsion Laboratory in Pasadena, CA. All of the projects involve the use of state-of-the-art numerical and visualization techniques applied to flow problems involving complex rheology and chemical kinetics, to seismic inversion problems involving three-dimensional visualization of earth structure and radar imaging problems of the Earth's surface. Hence they can be of great benefit to industrial partners in the geophysical and environmental science sector. Large data-sets for scientific visualization come from observations rather than from numerical simulations. How else would you get a data-set with 35,000 x 35,000 pixels.
The use of the spectral methods with gmres and finite-volume techniques in convection problems with temperature-dependent viscosity would be of interest to not only the geophysical sector, but to the chemical engineering community, such as in polymer processing and nuclear waste processing, where temperature-dependent viscosity variable thermal conductivity and shear-heating phenomena are also present. The use of higher-order finite-difference spectral-element and wavelet transform methods in solving fluid dynamical problems would also be of interest to fields such as reservoir modeling in the petroleum and environmental industries concerned with pollution. The development of wavelet transform method for solving partial differential equations and identifying coherent structures would be of great interest to the industrial sector.
The development of graphical interfaces and parallel visualization techniques for large-scale three-dimensional problems would be also of value to the geophysical and the government sector, particularly since these researchers employ large-scale visualization techniques for both time-dependent data-sets and also detailed static three-dimensional data-sets from seismic tomography and very large (20,000 x 20,000 pixels) two-dimensional images from satellite radar interferometry. Simulating detailed three-dimensional models are computationally intensive and their effective use for geophysical problems can be integrated into the geophysical industrial factor. Large-scale two-dimensional radar imaging on parallel computers and the rapid focusing of small portions of this data-set are of intense interest to NASA and also the military sector. These researchers are also working with computational scientists from IBM, such as Dr. Kirk Jordan and have been collaborating with him on visualization projects, such as pV3, which allows for interactive visualization between workstation cluster (client) and workstation (server). The acquisition of a powerful IBM visualization workstation and Intellistation PC are part of this overall visualization strategy.
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