Document Detail

A Sharp-Interface Immersed Boundary Method with Improved Mass Conservation and Reduced Spurious Pressure Oscillations.
MedLine Citation:
PMID:  21857745     Owner:  NLM     Status:  Publisher    
A method for reducing the spurious pressure oscillations observed when simulating moving boundary flow problems with sharp-interface immersed boundary methods (IBMs) is proposed. By first identifying the primary cause of these oscillations to be the violation of the geometric conservation law near the immersed boundary, we adopt a cut-cell based approach to strictly enforce geometric conservation. In order to limit the complexity associated with the cut-cell method, the cut-cell based discretization is limited only to the pressure Poisson and velocity correction equations in the fractional-step method and the small-cell problem tackled by introducing a virtual cell-merging technique. The method is shown to retain all the desirable properties of the original finite-difference based IBM while at the same time, reducing pressure oscillations for moving boundaries by roughly an order of magnitude.
Jung Hee Seo; Rajat Mittal
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Publication Detail:
Journal Detail:
Title:  Journal of computational physics     Volume:  230     ISSN:  0021-9991     ISO Abbreviation:  -     Publication Date:  2011 Aug 
Date Detail:
Created Date:  2011-8-22     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9883524     Medline TA:  J Comput Phys     Country:  -    
Other Details:
Languages:  ENG     Pagination:  7347-7363     Citation Subset:  -    
Department of Mechanical Engineering, Johns Hopkins University, Baltimore, MD, 21218.
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Grant Support
R01 DC007125-01A1//NIDCD NIH HHS; R01 DC007125-02//NIDCD NIH HHS; R01 DC007125-03//NIDCD NIH HHS; R01 DC007125-04//NIDCD NIH HHS

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