The Experts below are selected from a list of 24 Experts worldwide ranked by ideXlab platform
Yoshiteru Enomoto - One of the best experts on this subject based on the ideXlab platform.
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acceleration of unsteady Incompressible Flow Calculation using extrapolation methods
Transactions of the Japan Society of Mechanical Engineers. B, 2008Co-Authors: Kenjiro Shimano, Shun Yonezu, Yoshiteru EnomotoAbstract:Acceleration techniques are important in computational fluid dynamics as scientists and engineers hope to shorten the computational time. Although the multigrid method has been successful in achievement of quick convergence, this approach tends to show poor performance in parallel computing with the domain decomposition technique, especially when a small number of grid points are assigned to one processor. Another shortcoming of the multigrid method is complicated numerical procedures.
Kenjiro Shimano - One of the best experts on this subject based on the ideXlab platform.
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acceleration of unsteady Incompressible Flow Calculation using extrapolation methods
Transactions of the Japan Society of Mechanical Engineers. B, 2008Co-Authors: Kenjiro Shimano, Shun Yonezu, Yoshiteru EnomotoAbstract:Acceleration techniques are important in computational fluid dynamics as scientists and engineers hope to shorten the computational time. Although the multigrid method has been successful in achievement of quick convergence, this approach tends to show poor performance in parallel computing with the domain decomposition technique, especially when a small number of grid points are assigned to one processor. Another shortcoming of the multigrid method is complicated numerical procedures.
Shun Yonezu - One of the best experts on this subject based on the ideXlab platform.
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acceleration of unsteady Incompressible Flow Calculation using extrapolation methods
Transactions of the Japan Society of Mechanical Engineers. B, 2008Co-Authors: Kenjiro Shimano, Shun Yonezu, Yoshiteru EnomotoAbstract:Acceleration techniques are important in computational fluid dynamics as scientists and engineers hope to shorten the computational time. Although the multigrid method has been successful in achievement of quick convergence, this approach tends to show poor performance in parallel computing with the domain decomposition technique, especially when a small number of grid points are assigned to one processor. Another shortcoming of the multigrid method is complicated numerical procedures.
R W Sellens - One of the best experts on this subject based on the ideXlab platform.
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a distributive mass balance correction in single and multigrid Incompressible Flow Calculation
International Journal of Computational Fluid Dynamics, 1996Co-Authors: L Zeng, M D Matovic, A Pollard, R W SellensAbstract:The pressure-velocity coupling in a finite volume method (SIMPLE-type) is enhanced using a distributed mass balance correction method. The mass imbalance generated by the momentum equations is distributed over all control volumes prior to solving the pressure-correction equation. This method considerably enhances the convergence of the SIMPLE method, whether used on either a single staggered grid or a collocated multigrid. Some simple two- and three-dimensional laminar Flows are used to test the method.
Graham F. Carey - One of the best experts on this subject based on the ideXlab platform.
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A vector‐parallel scheme for Navier‐Stokes computations at multi‐gigaflop performance rates
International Journal for Numerical Methods in Fluids, 1995Co-Authors: A. A. Lorber, Graham F. CareyAbstract:A class of vector-parallel schemes for solution of steady compressible or Incompressible viscous Flow is developed and performance studies carried out. The algorithms employ an artificial transient treatment that permits rapid integration to a steady state. In the present work a four-stage explicit Runge-Kutta scheme employing variable local step size is utilized for the ODE system integration. The RK-4 scheme is restructured to allow vectorization and enhance concurrency in the Calculation for a streamfunction-vorticity formulation of the Flow problem. The parameters of the resulting RK scheme can be selected to accelerate convergence of the RK recursion. Four main procedures are considered which permit vector-parallel solution: a Jacobi update, a hybrid of the Jacobi and Gauss-Seidel method, red-black ordering and domain decomposition. Numerical performance studies are conducted with a representative viscous Incompressible Flow Calculation. Results indicate that a scheme involving domain decomposition with a Gauss-Seidel type of update for the RK four-stage scheme is most effective and provides performance in excess of 8 Gflops on the Cray C-90.
