Flip: A low-dissipation, particle-in-cell method for fluid flow
Flip: A low-dissipation, particle-in-cell method for fluid flow
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DOI：
10.1016/0010-4655(88)90020-3
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发表时间：
1988
影响因子：
6.3
通讯作者：
J. Brackbill;D. Kothe;H. Ruppel
中科院分区：
文献类型：
--
作者：
J. Brackbill;D. Kothe;H. Ruppel
Flip(流体隐含粒子)方法使用完全拉格朗日粒子来消除对流输运，对流输运是流体流动计算中计算扩散的最大来源。Flip是对用于模拟等离子体的隐式矩方法的流体的适应，在该方法中，粒子携带描述流体所需的一切。利用质点数据，在网格上求解拉格朗日矩方程。然后使用这些解将粒子变量从一个时间步长推进到另一个时间步长。自适应网格和隐式时间差分将该方法扩展到多时间和空间尺度的流动。通过对受限涡旋、瑞利-泰勒、不稳定的亚音速气流和超音速喷流的模拟，说明了翻转的一些特性。结果表明，FLIP的不稳定性适用于低耗散对正确建模至关重要的水动力稳定性问题。
The FLIP (Fluid-Implicit-Particle) method uses fully Lagrangian particles to eliminate convective transport, the largest source of computational diffusion in calculations of fluid flow. FLIP is an adaptation to fluids of the implicit moment method for simulating plasmas, in which particles carry everything necessary to describe the fluid. Using the particle data, Lagrangian moment equations are solved on a grid. The solutions are then used to advance the particle variables from time step to time step. An adaptive grid and implicit time differencing extend the method to multiple time and space scale flows. Aspects of FLIP's properties are illustrated by modeling of a confined eddy, a Rayleigh-Taylor, an unstable subsonic stream, and a supersonic jet. The results demonstrate FLIP's instability applicability to hydrodynamic stability problems where low dissipation is crucial to correct modeling.