Overset meshing in combination with novel blended weak-strong fluid-structure interactions for simulations of a translating valve in series with a second valve
Overset meshing in combination with novel blended weak-strong fluid-structure interactions for simulations of a translating valve in series with a second valve
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DOI：
10.1080/10255842.2023.2199903
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发表时间：
2023-04-05
影响因子：
1.6
通讯作者：
Fraser，K. H.
中科院分区：
文献类型：
--
作者：
Bornoff，J.;Gill，H. S.;Fraser，K. H.
机械循环支持(MCS)设备可以在等待可行的供者心脏的同时弥合移植的缺口。Realart全人工心脏是一种新型的正排量MCS，可产生搏动性流动的叶状机械瓣膜。本研究开发了一种计算流体力学和流固耦合(FSI)相结合的方法来模拟正排量双叶阀。采用重叠网格离散化流体域，并结合变时间步长的弱-强耦合FSI算法。评估了相关行程长度和比率的四种操作条件。结果表明，该建模策略对正位移型人工心脏的建模是稳定有效的。
Mechanical circulatory support (MCS) devices can bridge the gap to transplant whilst awaiting a viable donor heart. The Realheart Total Artificial Heart is a novel positive-displacement MCS that generates pulsatile flowviabileaflet mechanical valves. This study developed a combined computational fluid dynamics and fluid-structure interaction (FSI) methodology for simulating positive displacement bileaflet valves. Overset meshing discretised the fluid domain, and a blended weak-strong coupling FSI algorithm was combined with variable time-stepping. Four operating conditions of relevant stroke lengths and rates were assessed. The results demonstrated this modelling strategy is stable and efficient for modelling positive-displacement artificial hearts.