Tokyo Institute of Technology – ESC Joint Workshop

Tokyo Institute of Technology – ESC Joint Workshop

Date
December 15 (Mon.), 2008, 10:20-18:00
Place
Seminar Room. 1F, Earth Simulator Research Building, YES
Speaker
Keiko Takahashi, Ryo Onishi, Yuya Baba, Prof. Tayfun Tezduyar, Dr. Yoichi Ogata, Dr. Kenji Takizawa, Akira Kageyama, Takeshi Sugimura
Language
English

Schedule

10:20-10:30
Opening remark: Dr. Kunihiko Watanabe (ESC)
10:30-11:00
Keiko Takahashi (MSSG/ESC)
"MSSG activities and Multi-scale Multi-physics simulations"
11:00-11:30
Ryo Onishi (MSSG/ESC)
"Turbulent collisions of cloud droplets in convective clouds"
11:30-12:00
Yuya Baba (MSSG/ESC)
"Application of efficient fully compressible solver to flows around buildings and urban area"
12:00-13:00
Lunch
13:00-13:30
ES tour
The 1st MSSG_CREST Seminar, 13:30-16:10
13:30-15:00
Invited talk : Prof. Tayfun Tezduyar
Team for Advanced Flow Simulation and Modeling (T*AFSM)
Mechanical Engineering, Rice University
http://www.mems.rice.edu/TAFSM/
Title : Fluid--Structure Interaction Modeling of Orion Space Vehicle Parachutes
Abstract : NASA will be using a cluster of three ringsail parachutes during the terminal descent of the Orion space vehicle. In this presentation we focus on fluid--structure interaction (FSI) modeling of these parachutes. The geometric complexity created by the "rings" and "sails" used in the construction of the parachute canopy poses a significant computational challenge. Our FSI modeling of ringsail parachutes is based on the stabilized space--time FSI (SSTFSI) technique and a number of interface projection techniques. These projection techniques address the computational challenges posed by the geometric complexities of the fluid--structure interface. We present results from various cases of parachute simulations.
15:00-15:10
Coffee break
15:10-15:40
Invited talk : Dr. Yoichi Ogata (Hiroshima Univ.)
Title : Conservative Semi-Lagrangian CIP and its Applications to the Shallow Water Equations
Abstract : The shallow water equations are often used for one of models of numerical weather prediction (NWP) in not only mesoscale but also synoptic-scale calculations. A new characteristic approach that guarantees conservative property is proposed and is applied to the shallow water equations. CIP-CSL (Constrained Interpolation Profile / Conservative Semi-Lagrangian) interpolation is applied to the method of characteristics (MOC) in order to enhance the mass conservation of the numerical results (CSL-MOC). The formulations and some numerical tests with CSL-MOC scheme will be presented.
15:40-16:10
Invited talk : Dr. Kenji Takizawa (Rice University)
Title : Space–Time Finite Element Computation of Arterial FSI with Patient-Specific Data
Abstract : The stabilized space–time fluid–structure interaction (SSTFSI) technique developed by the Team for Advanced Flow Simulation and Modeling (T*AFSM) is applied to computation of arterial FSI with patient-specific data. The SSTFSI technique is based on the Deforming-Spatial-Domain/Stabilized Space–Time (DSD/SST) formulation and is supplemented with a number of special techniques developed for arterial FSI. These include a recipe for pre-FSI computations that improve the convergence of the FSI computations, using an estimated zero-pressure arterial geometry, and layers of refined fluid mechanics mesh near the arterial walls. In the test computations we focus on a patient-specific middle cerebral artery segment with aneurysm, where the arterial geometry is based on computed tomography images.
16:10-16:20
Coffee break
16:20-17:20
Akira Kageyama (SESG/ESC)
"Geodynamo simulation by Yin-Yang grid and its visualizations"
17:20-17:50
Takeshi Sugimura (MSSG/ESC)
"Fully Compressible Fluid Simulation on Spherical Geometry using Adaptive Soroban grid"
17:50-18:00
Closing remark: Prof. Takashi Yabe (Tokyo Institute of Technology)

Contact

Keiko Takahashi
Multiscale Simulation Research Program
Earth Simulator Center
TEL: 045-778-5834
e-mail: takahasi