B243 DSMC法における新衝突計算法の可能性(B-24 分子スケールの流れ(2),一般講演)

概要

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The new intermolecular collision scheme is developed to obtain an excellent result even if cells are lengthened in the DSMC calculation. In the new scheme, the velocity of one molecule of a collision pair is modified before and after a conventional collision calculation, assuming that velocity distributions in all flowfield are in local equilibrium with some temperature and flow velocity. The new collision scheme is applied to an axisymmetric supersonic free jet, a three-dimensional supersonic jet and a steady vortex behind an inclined flat plate, and its effect is confirmed. The new collision scheme is verified effective for unsteady flows such as vortex shedding, and the scheme is also applied to the calculation of velocity profiles in a circular tube under the condition of a turbulent flow even though it is still at a testing stage.
日本流体力学会の論文
2004-08-09