Kenichi Matsuno

Progressive Development of Moving-Grid Finite-Volume Method for Three-Dimensional Incompressible Flows

In this paper, parallel computation of three-dimensional incompressible flows driven by moving multiple bodies is presented using a new moving embedded zonal grid method. Moving embedded zonal grid method is the method such that the embedded zonal grid can move freely in one direction in a main grid which covers the whole of the flow field. The feature of the method is to satisfy both geometric and physical conservation laws simultaneously. The method is applied to a flow driven by two cubes moving in the originally stationary fluid. The computation was performed using multi-core CPUs and the parallel algorithm has been implemented in the Poisson solver and the performance has been tested.

Applications on Hybrid Unstructured Moving Grid Method for Three-Dimensional Compressible Flows

For CFD problem with a complicated moving boundary, the unstructured moving-grid finite-volume method has been proposed and its ability recognized. However, the method was limited for applications using inviscid compressible flows. In this paper, the method is developed to apply to three-dimensional Navier-Stokes equations for viscous compressible flows. We formulate a control volume for prismatic element well adapted to unstructured mesh. Then, the method is applied to a flow around oscillating ONERA M6 airfoil at high Reynolds nmber. And the computation is executed in OpenMP parallel environment.

Parallel Computation of Incompressible Flows Driven by Moving Multiple Obstacles Using a New Moving Embedded-Grid Method

In this paper, parallel computation of incompressible flows driven by moving multiple obstacles using a new moving embedded-grid method is presented. Moving embedded-grid method is the method such that the embedded grid can move arbitrarily in a main grid covering whole of the flow field. The feature of the method is to satisfy geometric and physical conservation laws. The method is applied to a flow where three square cylinders move in the stationary fluid, and computed using parallel machines.

Numerical Simulation of Compressible Flow using Three-Dimensional Unstructured Added/Eliminated Grid Method

A geometric conservation law should be considered on moving boundary problems in body-fitted coordinated grid system. In this paper, as moving grid problem, threedimensional unstructured mesh with add and eliminated grid system is dealt with. In using add and eliminated grid method, the unstructured moving grid finite volume method is adopted. In this case, a control volume is treated as four-dimensional spacetime unified domain. So, a procedure of calculation is relatively complicatedly, espacially, in the case of parallel computation. In this paper, parallelization with OpenMP of the computation is estimated.

A Fluid-Structure Interaction Problem on Unstructured Moving-Grid using OpenMP Parallelization

In this paper, to calculate a fluid-structure interaction problem in three-dimensional system, we proposed an extended unstructured moving-grid finite-volume method. In this case, it is important that physical and geometric conservation laws are satisfied on the moving grid, and the method is able to satisfy these laws perfectly. In this method, flux and other variables are estimated on control volumes in space-time unified domain. So, in the case of three-dimensional system, they are treated as four-dimensional domain which has a three-dimensional space term and a one-dimensional time term. In this paper, a three dimensional gun-tunnel problem as a large-scale fluid-structure interaction problem is dealt with and estimated using OpenMP parallelization.