Print Email Facebook Twitter Level-set Based Fluid-structure Interaction Modeling with the eXtended Finite Element Method Title Level-set Based Fluid-structure Interaction Modeling with the eXtended Finite Element Method Author Bosma, T. Contributor Langelaar, M. (mentor) Van Keulen, F. (mentor) Maute, K. (mentor) Faculty Mechanical, Maritime and Materials Engineering Department Precision and Microsystems Engineering Date 2013-12-04 Abstract This study focuses on solving steady state fluid-structure interaction (FSI) problems subjected to incompressible flow at low Reynolds numbers and linear elastic structural behavior. The fluid-structure interface geometry is described with a levelset method (LSM). The governing equations are discretized in space with the eXtended Finite Element Method (XFEM). At the fluid-structure interface, a traction and a no-slip condition are enforced to model the interaction between the two phases. Combining XFEM and LSM gives crisp and clear physical behavior at the fluid-structure interface, which is beneficial for topology optimization purposes. Two different solvers, a staggered and a monolithic solver, are used to test the accuracy of the results of the steady state solution and to check whether a numerically consistent Jacobian is built. The results show that the implementation needs to be improved in order to monolithically solve the system successfully. Finite differences are used to check the consistency of the Jacobian and show that Jacobian terms related to the levelset field are inconsistent. The proposed LSM introduces secondary coupling between neighboring elements, which is not correctly handled in the current implementation. Subject fluid-structuremodelingfinite element method To reference this document use: http://resolver.tudelft.nl/uuid:d1591c66-84ed-48ee-83e1-bbb1159e3195 Embargo date 2014-01-01 Part of collection Student theses Document type master thesis Rights (c) 2013 Bosma, T. Files PDF EM_2013_032_-_Bosma_-_MSc ... Thesis.pdf 33.77 MB PDF EM_2013_032_-_Bosma_-_MSc ... tation.pdf 2.9 MB Close viewer /islandora/object/uuid:d1591c66-84ed-48ee-83e1-bbb1159e3195/datastream/OBJ1/view