A Lattice Boltzmann Simulation of Hemodynamics in a Patient-Specific Aortic Coarctation Model
A Lattice Boltzmann Simulation of Hemodynamics in a Patient-Specific Aortic Coarctation Model
复制标题
患者特定主动脉缩窄模型中血流动力学的格子玻尔兹曼模拟
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
E. Kaxiras
中科院分区：
文献类型：
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作者：
A. Randles;Moritz Bächer;H. Pfister;E. Kaxiras
在本文中，我们提出了一种确定主动脉静止时压力梯度的系统。我们开发了一种技术，有效地初始化一个定期的模拟网格从患者特定的主动脉三角模型。在这个网格上，我们采用格子玻尔兹曼方法来解决通过血管的特征流体流动。施加生理学测量的流入速率，提供准确的脉动流。模拟需要至少20微米的分辨率，以确保压力计算的收敛。HARVEY是一种大规模并行代码，在IBM Blue Gene/Q超级计算机上运行，以这种高分辨率模拟流动。我们分析和评估我们的系统的优势和劣势。
In this paper, we propose a system to determine the pressure gradient at rest in the aorta. We developed a technique to efficiently initialize a regular simulation grid from a patient-specific aortic triangulated model. On this grid we employ the lattice Boltzmann method to resolve the characteristic fluid flow through the vessel. The inflow rates, as measured physiologically, are imposed providing accurate pulsatile flow. The simulation required a resolution of at least 20 microns to ensure a convergence of the pressure calculation. HARVEY, a large-scale parallel code, was run on the IBM Blue Gene/Q supercomputer to model the flow at this high resolution. We analyze and evaluate the strengths and weaknesses of our system.