An efficient parallel simulation of unsteady blood flows in patient-specific pulmonary artery
- Idaho National Lab. (INL), Idaho Falls, ID (United States). Modeling and Simulation
- Univ. of Colorado, Denver, CO (United States). School of Medicine
- Univ. of Texas, San Antonio, TX (United States). Dept. of Mechanical Engineering
- Univ. of Colorado, Boulder, CO (United States). Dept. of Computer Science
Abstract Simulation of blood flows in the pulmonary artery provides some insight into certain diseases by examining the relationship between some continuum metrics, eg, the wall shear stress acting on the vascular endothelium, which responds to flow‐induced mechanical forces by releasing vasodilators/constrictors. V. Kheyfets, in his previous work, studies numerically a patient‐specific pulmonary circulation to show that decreasing wall shear stress is correlated with increasing pulmonary vascular impedance. In this paper, we develop a scalable parallel algorithm based on domain decomposition methods to investigate an unsteady model with patient‐specific pulsatile waveforms as the inlet boundary condition. The unsteady model offers tremendously more information about the dynamic behavior of the flow field, but computationally speaking, the simulation is a lot more expensive since a problem which is similar to the steady‐state problem has to be solved many times, and therefore, the traditional sequential approach is not suitable anymore. We show computationally that simulations using the proposed parallel approach with up to 10 000 processor cores can be obtained with much reduced compute time. This makes the technology potentially usable for the routine study of the dynamic behavior of blood flows in the pulmonary artery, in particular, the changes of the blood flows and the wall shear stress in the spatial and temporal dimensions.
- Research Organization:
- Idaho National Laboratory (INL), Idaho Falls, ID (United States)
- Sponsoring Organization:
- USDOE; National Science Foundation (NSF)
- Grant/Contract Number:
- AC07-05ID14517; DMS-1720366
- OSTI ID:
- 1484705
- Alternate ID(s):
- OSTI ID: 1419356
- Report Number(s):
- INL/JOU-17-42412-Rev001
- Journal Information:
- International Journal for Numerical Methods in Biomedical Engineering, Vol. 34, Issue 4; ISSN 2040-7939
- Publisher:
- WileyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Simulation of unsteady blood flows in a patient‐specific compliant pulmonary artery with a highly parallel monolithically coupled fluid‐structure interaction algorithm
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