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首页> 外文期刊>International journal of numerical methods for heat & fluid flow >Numerical treatment of mass continuity in pressure-correction methods for patient specific flow simulations
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Numerical treatment of mass continuity in pressure-correction methods for patient specific flow simulations

机译：用于患者特定流量模拟的压力校正方法中质量连续性的数值处理

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Purpose - The purpose of this paper is the development of a robust numerical scheme for fluid flow simulations in complex domains with open boundaries. Design/methodology/approach - A modified pressure correction algorithm is presented. The proposed modifications are derived through a step-by-step analysis of the importance of mass continuity enforcement in pressure correction methods, the boundary conditions of the pressure correction equation and the special nature of open boundaries. Findings - The algorithm is validated by performing steady state laminar flow simulations in two backward facing step geometries with progressively truncated outlet channels. The efficiency of the methodology is demonstrated by simulating the pulsatile flow field in a patient specific iliac bifurcation reconstructed by medical imaging data. Originality/value - The proposed numerical scheme provides accurate and mass conserving solutions in complex domains with open boundaries. The proposed methodology may be directly implemented in any computational domain without any prerequisites regarding the location or type of domain boundaries.
机译：目的-本文的目的是为在具有开放边界的复杂域中的流体流动仿真开发鲁棒的数值方案。设计/方法/方法-提出了一种改进的压力校正算法。通过逐步分析质量连续性实施在压力校正方法中的重要性，压力校正方程的边界条件和开放边界的特殊性质，可以得出建议的修改方案。研究结果-该算法通过在具有逐渐截断的出口通道的两个向后的阶梯几何形状中执行稳态层流模拟来进行验证。通过模拟由医学成像数据重建的患者特定的bi分叉处的搏动流场，证明了该方法的有效性。原创性/价值-所提出的数值方案在具有开放边界的复杂域中提供了精确且节省质量的解决方案。所提出的方法可以直接在任何计算域中实现，而无需任何关于域边界的位置或类型的先决条件。

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