An ensemble solver for segregated cardiovascular FSI

An ensemble solver for segregated cardiovascular FSI
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用于分离心血管 FSI 的整体求解器

DOI:
10.1007/s00466-021-02076-4
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发表时间:
2021
影响因子:
4.1
通讯作者:
Schiavazzi, Daniele E.
Schiavazzi, Daniele E.
中科院分区:
工程技术2区
文献类型:
--
作者:
Li, Xue;Schiavazzi, Daniele E.

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计算模型越来越多地用于心血管疾病的诊断和治疗。为了提供一个定量的血流动力学的理解,可以有效地用于临床,这是至关重要的量化这些模型输出的可变性由于多个不确定性来源。为了量化这种可变性,分析人员总是需要生成大量高保真模型解决方案,这通常需要大量的计算工作。在本文中,我们展示了显式实时集成心血管求解器如何相对于使用隐式实时算法的令人尴尬的并行解提供优越的性能,这是典型的非侵入性不确定性传播的内外部循环范式。我们详细讨论了在CPU和GPU系统上分离的FSI心血管求解器的数值和高效分布式实现,并证明了其在理想和患者特定心血管模型中的适用性,并在稳定和脉动流条件下进行了分析。
Computational models are increasingly used for diagnosis and treatment of cardiovascular disease. To provide a quantitative hemodynamic understanding that can be effectively used in the clinic, it is crucial to quantify the variability in the outputs from these models due to multiple sources of uncertainty. To quantify this variability, the analyst invariably needs to generate a large collection of high-fidelity model solutions, typically requiring a substantial computational effort. In this paper, we show how an explicit-in-timeensemblecardiovascular solver offers superior performance with respect to the embarrassingly parallel solution with implicit-in-time algorithms, typical of an inner-outer loop paradigm for non-intrusive uncertainty propagation. We discuss in detail the numerics and efficient distributed implementation of a segregated FSI cardiovascular solver on both CPU and GPU systems, and demonstrate its applicability to idealized and patient-specific cardiovascular models, analyzed under steady and pulsatile flow conditions.
用于刚性和可变形血管心血管模拟的预处理迭代线性求解器的性能
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发表时间: 2019
影响因子: 4.1
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