格子渦法における粘性拡散に関する研究

概要

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The Lattice vortex method (LVM) by introducing virtual vortices has been proposed by the authors. This paper has focused on the treatment of viscous diffusion of vortices. From the result of calculation of a convection diffusion equation, giving a vorticity distribution of one vortex by the Gauss distribution offered good accuracy in the calculation of vortex diffusion and this method made the limitation of the Courant number relaxed. In the flow analysis by the LVM, the convection of vortices was calculated by secondorder area weighting scheme. It was found that the combination of this scheme and vorticity distribution determined by Gaussian distribution offered good result. Moreover, the result of cavity flow analysis turned out to be having sufficent accuracy by comparing with the result of the finite difference method. Therefore, LVM can be used for inner flow that the conventional vortex method is not so used.
社団法人日本機械学会の論文
1998-03-25