In order to reduce the complexity of heart hemodynamics simulations, uncoupling approaches are often considered for the modeling of the immersed valves as an alternative to complex fluid‐structure interaction (FSI) models. A possible shortcoming of these simplified approaches is the difficulty to correctly capture the pressure dynamics during the isovolumetric phases. In this work, we propose an enhanced resistive immersed surfaces (RIS) model of cardiac valves, which overcomes this issue. The benefits of the model are investigated and tested in blood flow simulations of the left heart where the physiological behavior of the intracavity pressure during the isovolumetric phases is recovered without using fully coupled fluid‐structure models and without important alteration of the associated velocity field.

中文翻译：

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增强的电阻式浸入式表面瓣膜模型，用于模拟具有等容相的心脏血液动力学。

为了降低心脏血液动力学模拟的复杂性，通常考虑采用非耦合方法对浸没式瓣膜进行建模，以替代复杂的流体结构相互作用（FSI）模型。这些简化方法的可能缺点是难以在等容阶段正确捕获压力动态。在这项工作中，我们提出了一种增强的心脏瓣膜的电阻式浸没表面（RIS）模型，该模型克服了这个问题。在不使用完全耦合的流体结构模型且不对相关速度场进行重大更改的情况下，在等体积阶段恢复腔内压力的生理行为时，在左心脏的血流模拟中研究并测试了该模型的优势。