SPH法に関する基礎的研究 : 第2報,粒子径が異なる場合の2相流境界問題の取扱い(流体工学,流体機械)

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rights: 本文データは社団法人日本機械学会の許諾に基づきCiNiiから複製したものであるIn preceding report, we proposed Relaxation equations for the smoothed particle hydrodynamics (SPH) method suited to suppress the numerical disorder around the boundary of 2 phase flow as gas and liquid. The effect of the equations was discussed for uniformly distributed particles having same smoothing length. But, when the smoothing length of particles is not constant, it causes numerical disorder again. Additionally, there was a difficulty that the momentum conservation is not satisfied in the Relaxation equation. This paper discusses the problem of numerical disorder caused by the difference of the smoothed length between particle, and we propose a new calculation method suited to suppress the numerical disorder. Additionally, we discuss about the treatment of smoothing length, which was not clearly discussed previously, and we propose a revised Relaxation equation.
社団法人日本機械学会の論文
2007-01-25