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首页> 外文期刊>Journal of Computational Physics >Backflow stabilization by deconvolution-based large eddy simulation modeling
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Backflow stabilization by deconvolution-based large eddy simulation modeling

机译：基于去卷积的大型涡仿真建模的回流稳定

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摘要

In the numerical simulations of incompressible fluids, the occurrence of incoming flows through outlet boundaries where Neumann conditions are prescribed may introduce the numerical instability known as the backflow instability. This backflow instability is related to the nonlinear convective term and is often challenging the numerical simulation of the blood flow in large vessels. In fact, the alternation of systole and diastole induces backflows at the outlets, which are usually Neumann boundaries since the lack of velocity data requires the prescription of traction/pressure conditions. The Reynolds numbers that trigger the backflow instability are generally moderate (in the range of a few hundreds and above).
机译：在不可压缩流体的数值模拟中，传入流过出口边界的发生，其中规定了Neumann条件的数值不稳定性，称为回流不稳定性。 这种回流不稳定性与非线性对流术语有关，并且通常挑战大血管中血流的数值模拟。 事实上，Systole和DiaStole的交替诱导出口的回流，这通常是Neumann界限，因为速度数据缺乏需要牵引/压力条件的处方。 触发回流不稳定性的雷诺数通常是中等的（在几百和更高的范围内）。

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