波动流体力学的无网格方法
Meshfree method for fluctuating hydrodynamics
AI总结:
提出一种无网格拉格朗日粒子方法求解Landau-Lifshitz Navier-Stokes方程,通过添加白噪声通量引入热涨落,并验证了平衡流的方差和相关性与理论值的一致性,以及驻激波的随机游走。
摘要:
在当前研究中,开发了一种用于Landau-Lifshitz Navier-Stokes (LLNS)方程的无网格拉格朗日粒子方法。LLNS方程通过添加白噪声通量将热涨落引入宏观流体力学,其大小由涨落-耗散定理确定。本研究侧重于捕捉平衡流中计算得到的正确方差和相关性,并与可用的理论值进行比较。此外,还考虑了驻激波随机游走的数值测试,以捕捉激波位置。
英文摘要:
In the current study a meshfree Lagrangian particle method for the Landau-Lifshitz Navier-Stokes (LLNS) equations is developed. The LLNS equations incorporate thermal fluctuation into macroscopic hydrodynamics by the addition of white noise fluxes whose magnitudes are set by a fluctuation-dissipation theorem. The study focuses on capturing the correct variance and correlations computed at equilibrium flows, which are compared with available theoretical values. Moreover, a numerical test for the random walk of standing shock wave has been considered for capturing the shock location.
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