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2011Twophase Flow Simulation of OilAir Steering with a Rotating GearA oilair twophase flow is solved by meshbased semiimplicit numerical method on a rotating frame.


2011Largescale GPU Simulation for Dendritic Solidification of AlSi Alloy3dimensional PhaseField Simulation for the dendritic solidification of AlSi binary alloy. A performance of 2.0 PFLOPS has been achieved on 4,000 GPU of the TSUBAME 2.0 supercomputer


2010A Typhoon Simulation on Horizontal 500m Mesh using the NextGeneration Weather Prediction Model ASUCAThe nextgeneration weather prediction model ASUCA being developed by Japan Meteorological Agency has been implemented on a GPU rich supercomputer TSUBAME2.0. A typhoon simulation is successfully carried out with horizontal 500m mesh covering the whole Japan area. 

2010A GasLiquid TwoPhase Flow Simulation using MultiGPU computingA leading water of the breaking dam water launching into a wet floor becomes strongly violent, which is quit different from that into a dry floor. A twophase flow model is solved on a numerical mesh and a multiGPU sparse matrix solver using Krylov subspace iteration method with a MG preconditioner has been developed for the pressure Poisson equation.


2009GPU Computing for Dendritic Solidification of a Pure Metal based on PhaseField ModelA largescale GPU simulation for a dendritic solidification of a pure metal is carried out using 60 GPUs of NVIDIA Tesla S1070 on TSUBAME1.2 and a performance of 60 TFlops has been achieved for the computation of 1024x1024x1024 mesh.


2008GPU Computing for RayleighTaylor instabilityCompressible CFD application can be accelerated on GPU. The Euler equation is accurately solved by conservative IDO scheme. When GeForce GTX280 is used, 40 times speedup (54 GFlops) is achieved.


2008Tsunami Simulation on GPUThe shallow water equation is solved by the conservative IDO scheme. The tsunami runup to dry area can be computed accurately. The GPU computing achieves 60 times speedup for NVIDIA GeForce GTX280.


2008Granular Behavior composed of nonspherical particle shapes.Such nonspherical shapes as rice are taken into consideration to study numerically the real granular phenomena, and the numerical results are in good agreement with the experiment.


2007Rock Falling SimulationThe complex shapes of rocks are modeled as assemblies of small particles rigidly connecting each others. In order to describe the rotation of rocks, quaternion is introduced. 

2006Mesoscale Atmosphere Model (Typhoon Simulation)Nonhydrostatic atmosphere model is necessary to study typhoon. In collaboration with HyRAC Nagoya University, spiral rain bands are described well.


2005Rising Bubbly FlowThe Multiphase flow is solved by the CIP method. The bubbly flow collaboration with JAEA. The photorealistic images are visualized by the raytracing technique of the software POVRay.


2003ExplosionBlastwaveExtremely high pressure of the detonation product gas drives hydrodynamic instabilities for the blastwave evolved into turbulent state. 

20023D Visualization for Particle Simulation (DEM)Granular phenomena like Meteorite Impact on the ground. The simulation is based on the Distinct Element Method and parallelized by OpenMP. To see the 3D graphics, an anaglyph glass is 

2001Falling LeavesFluidStructure Interaction study using overset grid method and IDO scheme. The falling trajectory of the leaves strongly depend on the initial attitudes.
