Immersed boundary method predictions of shear stresses for different flow topologies occuring in cerebral aneurysms

Mikhal, Julia and Lopez Penha, David J. and Slump, Cornelis H. and Geurts, Bernard J. (2010) Immersed boundary method predictions of shear stresses for different flow topologies occuring in cerebral aneurysms. In: V European Conference on Computational Fluid Dynamics, ECCOMAS CFD 2010, 14-17 June 2010, Lisbon, Portugal.

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Abstract:	A volume-penalizing immersed boundary method is presented that facilitates the computation of incompressible fluid flow in complex flow domains. We apply this method to simulate the flow in cerebral aneurysms, and focus on the accuracy with which the flow field and the corresponding shear stress field are computed. The method is applied to laminar, incompressible flow in curved cylindrical vessels and in a model aneurysm. The time-dependent shear stress distributions over the vessel walls are visualized and interpreted in terms of the flow fields that develop. We compute shear stress levels at two different Reynolds numbers, corresponding to a steady and an unsteady flow. In the latter situation strong fluctuations in the shear stress are observed, that may be connected to raised risk-levels of aneurysm rupture.
Item Type:	Conference or Workshop Item
Faculty:	Electrical Engineering, Mathematics and Computer Science (EEMCS)
Research Group:	Mathematics of Computational Science (MaCS) Signals and Systems (SAS)
Link to this item:	http://purl.utwente.nl/publications/79147
Official URL:	http://web.univ-ubs.fr/limatb/EG2M/Disc_Seminaire/ECCOMAS-CFD2010/papers/01156.pdf
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