Parallel Implementation of the Immersed Boundary Method

该SGER奖将支持浸没边界方法在三维心脏模型应用中的并行实施。浸没边界法是一种用于模拟粘性不可压缩流体与浸没弹性边界相互作用的系统的计算技术，这种系统在生物流体动力学中是普遍存在的，浸没边界方法已经被应用于心腔内的血液流动、凝血过程中的血小板聚集、水生动物的运动、以及波在内耳中的传播。目前浸没边界方法的实现在Cray计算机上是完全矢量化的，但只使用了一个处理器，尽管有几个处理器可用。拟议研究的目的是创建一个并行实现，在有效利用所有可用的处理器的同时保持完全向量化。这项工作将在Cray C-90计算机上完成，这是一台16处理器的计算机，计划于今年秋天到达匹兹堡超级计算中心。由于并行化带来的预期加速比，浸没边界方法的科学实用性将得到极大的提高。

This SGER award will support the parallel implementation of the immersed boundary method in the application of a three- dimensional heart model. The immersed boundary method is a computational technique for the simulation of systems in which a viscous incompressible fluid interacts with an immersed elastic boundary Such systems are ubiquitous in biological fluid dynamics, and the immersed boundary method has already been applied to problems of blood flow in the cardiac chambers, platelet aggregation during blood clotting, aquatic animal locomotion, and wave propagation in the inner ear. Current implementation of the immersed boundary method are fully vectorized on Cray computers, but only a single processor is used although several are available. The aim of the proposed research is to create a parallel implementation which maintains full vectorization while making effective use of all available processors. This work will be done on the Cray C-90 Computer, a 16-processor machine which is scheduled to arrive at the Pittsburgh Supercomputing Center this fall. The scientific utility of the immerse boundary method will be enormously enhanced by the anticipated speedup resulting from parallelization.