Immersogeometric analysis of moving objects in incompressible flows

dc.contributor.author Hsu, Ming-Chen
dc.contributor.author Xu, Songzhe
dc.contributor.author Xu, Fei
dc.contributor.author Ganapathysubramanian, Baskar
dc.contributor.author Kommajosula, Aditya
dc.contributor.author Hsu, Ming-Chen
dc.contributor.author Ganapathysubramanian, Baskar
dc.contributor.department Mechanical Engineering
dc.contributor.department Electrical and Computer Engineering
dc.contributor.department Plant Sciences Institute
dc.date 2019-07-15T21:50:53.000
dc.date.accessioned 2020-06-30T06:05:09Z
dc.date.available 2020-06-30T06:05:09Z
dc.date.copyright Tue Jan 01 00:00:00 UTC 2019
dc.date.issued 2019-07-15
dc.description.abstract <p>We deploy the immersogeometric approach for tracking moving objects. The method immerses objects into non-boundary-fitted meshes and weakly enforces Dirichlet boundary conditions on the object boundaries. The object motion is driven by the integrated surface force and external body forces. A residual-based variational multiscale method is employed to stabilize the finite element formulation for incompressible flows. Adaptively refined quadrature rules are used to better capture the geometry of the immersed boundaries by accurately integrating the intersected background elements. Treatment for the freshly-cleared nodes (i.e. background mesh nodes that are inside the object at one time step, but are in the fluid domain at the next time step) is considered. We assess the accuracy of the method by analyzing object motion in different flow structures including objects freely dropping in viscous fluids and particle focusing in unobstructed and obstructed micro-channels. We show that key quantities of interest are in very good agreements with analytical, numerical and experimental solutions. We also show a much better computational efficiency of this framework than current commercial codes using adaptive boundary-fitted approaches. We anticipate deploying this framework for applications of particle inertial migration in microfluidic channels.</p>
dc.description.comments <p>This is a manuscript of an article published as Xu, Songzhe, Fei Xu, Aditya Kommajosula, Ming-Chen Hsu, and Baskar Ganapathysubramanian. "Immersogeometric analysis of moving objects in incompressible flows." <em>Computers & Fluids</em> 189 (2019): 24-33. DOI: <a href="http://dx.doi.org/10.1016/j.compfluid.2019.05.018" target="_blank">10.1016/j.compfluid.2019.05.018</a>. Posted with permission.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/me_pubs/361/
dc.identifier.articleid 1363
dc.identifier.contextkey 14647867
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath me_pubs/361
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/55233
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/me_pubs/361/2019_HsuMingChen_ImmersogeometricAnalysisMoving.pdf|||Fri Jan 14 23:47:30 UTC 2022
dc.source.uri 10.1016/j.compfluid.2019.05.018
dc.subject.disciplines Computer-Aided Engineering and Design
dc.subject.disciplines Mechanical Engineering
dc.subject.keywords Moving objects
dc.subject.keywords Immersogeometric method
dc.subject.keywords Weakly enforced boundary conditions
dc.subject.keywords Particle inertial migration
dc.subject.keywords Fluid–structure interaction
dc.title Immersogeometric analysis of moving objects in incompressible flows
dc.type article
dc.type.genre article
dspace.entity.type Publication
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