Partitioned semi-implicit methods for simulation of biomechanical fluid-structure interaction problems
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hdl:2117/97189
Tipus de documentText en actes de congrés
Data publicació2016
EditorInstitute of Physics (IOP)
Condicions d'accésAccés obert
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continguts d'aquesta obra estan subjectes a la llicència de Creative Commons
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Reconeixement 3.0 Espanya
Abstract
This paper represents numerical simulation of fluid-structure interaction (FSI) system involving an
incompressible viscous fluid and a lightweight elastic structure. We follow a semi-implicit approach in which we
implicitly couple the added-mass term (pressure stress) of the fluid to the structure, while other terms are coupled
explicitly. This significantly reduces the computational cost of the simulations while showing adequate stability.
Several coupling schemes are tested including fixed-point method with different static and dynamic relaxation,
as well as Newton-Krylov method with approximated Jacobian. Numerical tests are conducted in the context of a
biomechanical problem. Results indicate that the Newton-Krylov solver outperforms fixed point ones while introducing
more complexity to the problem due to the evaluation of the Jacobian. Fixed-point solver with Aitken's relaxation
method also proved to be a simple, yet efficient method for FSI simulations.
Descripció
This article is published under a CC BY licence. The Version of Record is available online at: http://dx.doi.org/10.1088/1742-6596/745/3/032020.
CitacióNaseri, A., Lehmkuhl, O., Gonzalez, I., Oliva, A. Partitioned semi-implicit methods for simulation of biomechanical fluid-structure interaction problems. A: European Thermal-Sciences Conference. "Journal of Physics: conference series, vol. 745, 2016". Krakow: Institute of Physics (IOP), 2016.
ISBN1742-6596
Versió de l'editorhttp://iopscience.iop.org/article/10.1088/1742-6596/745/3/032020
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