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Fluid–structure interaction simulation of pulsatile ventricular assist devices

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Abstract

In this paper we present a collection of fluid–structure interaction (FSI) computational techniques that enable realistic simulation of pulsatile Ventricular Assist Devices (VADs). The simulations involve dynamic interaction of air, blood, and a thin membrane separating the two fluids. The computational challenges addressed in this work include large, buckling motions of the membrane, the need for periodic remeshing of the fluid mechanics domain, and the necessity to employ tightly coupled FSI solution strategies due to the very strong added mass effect present in the problem. FSI simulation of a pulsatile VAD at realistic operating conditions is presented for the first time. The FSI methods prove to be robust, and may be employed in the assessment of current, and the development of future, pulsatile VAD designs.

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Acknowledgments

The support of the AFOSR Award No. FA9550-12-1-0005 and a Burroughs Wellcome Fund Career Award at the Scientific Interface is gratefully acknowledged. We also thank the San Diego Supercomputing Center (SDSC) at the University of California, San Diego for providing HPC resources that have contributed to the research results reported in this paper.

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  1. University of California, San Diego, 9500 Gilman Drive, Mail Code 0085, La Jolla, San Diego, CA, 92093-0085, USA

    Y. Bazilevs

  2. University of California, San Diego, 9500 Gilman Drive, Mail Code 0411, La Jolla, San Diego, CA, 92093-0085, USA

    C. C. Long & A. L. Marsden

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  1. C. C. Long
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Long, C.C., Marsden, A.L. & Bazilevs, Y. Fluid–structure interaction simulation of pulsatile ventricular assist devices. Comput Mech 52, 971–981 (2013). https://doi.org/10.1007/s00466-013-0858-3

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