講 演 会
演題 (title): Simulation of Double Fluid Mixtures
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Enhua Wu, Ph.D.
Associate Dean of the Faculty of Science and Technology in University of Macau
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2008年6月24日（火）15:00−16:30 |
講演場所 (location)
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東京大学本郷キャンパス 理学部7号館214
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In the fluid simulation, interaction happens in two ways with Fuids, the fluids with their surroundings as well as the mixture among different type of fluids. The later in fact receives little attention so far. However in our surrounding environment of daily life, we may often see various liquid-liquid mixture phenomena, like pouring honey into water, Coca Cola into strong wine etc., while researches have devoted little to the simulation of the phenomena. In fact, interactions among fluid mixtures in different kinds would generate more comprehensive behavior. To investigate the interaction behavior in physically-based simulation of fluids, it is of importance to build physically correct models to represent the varying interactions among the mixtures.
In this talk, stress will be put on the physically based simulation of fluid mixtures in two fluids, or binary mixtures. The approaches we have experienced for the solution to the fluid mixture simulation will be introduced, with some simulation results to be demonstrated. In some of the methods, advantage is taken with the Graphics Processing Unit (GPU) to achieve real-time computation for the simulation.
Roughly in terms of the miscibility of binary mixtures, the fluid mixture can be categorized into immiscible mixtures such as bubbles in liquid or oil in water, and miscible mixtures such as honey dissolving in water. The visual appearance of the mixture physically roots in two opposite processes: the diffusing and the demixing. The diffusing process leads to the dissolving effect, while the demixing process leads to the separation effect. In our solution, we designed a method in which the miscible and immiscible mixtures can be simulated as a whole in a unified framework.
In our work, we mainly use the Lattice Boltzmann Method (LBM) to simulate the underlying dynamics of miscible mixtures in binary fluid simulation. However, it suffers from the limitation of only resolving mixture flows with low Reynolds number, and it would blow up when the Reynolds number gets higher. In order to resolve the problem, we proposed a method to stabilize the computation of two fluid mixtures.
講演者について (about the speaker)：
Dr. Wu, Enhua received his BSc from Tsinghua University in 1970 and lectured there until 1980. After he received his PhD degree from Dept. of Computer Science, University of Manchester, England in 1984, he has been working at the Institute of Software (IOS), Chinese Academy of Sciences (CAS), as director of its Research Dept. on Fundamental Theory and Advanced Technology until 1998. Now he is a full professor in the State Key Lab. of Computer Science, IOS/CAS. And since September 1997, he has been also invited as a full professor of University of Macau (UM), and now the Associate Dean of the Faculty of Science and Technology in UM.
Dr. Wu’s main interests are realistic image synthesis, virtual reality and scientific visualization. In recent years, he has been invited to chair or co-chair a number of conferences, or program committees, such as ACM VRST2002, CAD/Graphics2003, Pacific Graphics2005, ACM VRCIA2006/2008, CASA2006, CyberWorlds2008. Since middle nineties, he has been invited to join the editorial board by a number of international and domestic publications. Now he is an Associate Editor-in-Chief of the Journal of Computer Science and Technology, and Editor-in-Chief of Chinese Journal of Computer Aided Design and Computer Graphics, the editorial board member of The Visual Computer, Computer Animation and Virtual Worlds, International Journal of Image and Graphics and International Journal of Virtual Reality. He has been also in recent years invited as a keynote speaker by a number of international conferences such as ACM VRST2002, CASA2002/2004, CyberWorlds2006, PMA2006, CAD/Graphics2007.
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