A consistent sharp interface fictitious domain method for moving boundary problems with arbitrarily polyhedral mesh

2021 ◽  
Author(s):  
Guoliang Chai ◽  
Le Wang ◽  
Zhaolin Gu ◽  
Chunlei Yu ◽  
Yigen Zhang ◽  
...  
Keyword(s):  
Moving Boundary ◽  
Sharp Interface ◽  
Fictitious Domain ◽  
Moving Boundary Problems ◽  
Fictitious Domain Method ◽  
Boundary Problems ◽  
Domain Method ◽  
Polyhedral Mesh

scholarly journals Improving the Accuracy of Fictitious Domain Method Using Indicator Function from Volume Intersection

2019 ◽  
Vol 2019 ◽  
pp. 1-18
Author(s):  
Guoliang Chai ◽  
Junwei Su ◽  
Le Wang ◽  
Chunlei Yu ◽  
Yigen Zhang ◽  
...  
Keyword(s):  
Circular Cylinder ◽  
Boundary Problem ◽  
Moving Boundary ◽  
Indicator Function ◽  
Fictitious Domain ◽  
Moving Boundary Problems ◽  
Fictitious Domain Method ◽  
Boundary Problems ◽  
Domain Method ◽  
Volume Intersection

Fictitious domain method (FDM) is a commonly accepted direct numerical simulation technique for moving boundary problems. Indicator function used to distinguish the solid zone and the fluid zone is an essential part concerning the whole prediction accuracy of FDM. In this work, a new indicator function through volume intersection is developed for FDM. In this method, the arbitrarily polyhedral cells across the interface between fluid and solid are located and subdivided into tetrahedrons. The fraction of the solid volume in each cell is accurately computed to achieve high precision of integration calculation in the particle domain, improving the accuracy of the whole method. The quadrature over the solid domain shows that the newly developed indicator function can provide results with high accuracy for variable integration in both stationary and moving boundary problems. Several numerical tests, including flow around a circular cylinder, a single sphere in a creeping shear flow, settlement of a circular particle in a closed container, and in-line oscillation of a circular cylinder, have been performed. The results show good accuracy and feasibility in dealing with the stationary boundary problem as well as the moving boundary problem. This method is accurate and conservative, which can be a feasible tool for studying problems with moving boundaries.

Combination of direct-forcing fictitious domain method and sharp interface method for dielectrophoresis of particles

Particuology ◽  
2010 ◽  
Vol 8 (4) ◽  
pp. 351-359 ◽  
Author(s):  
Yang Shi ◽  
Zhaosheng Yu ◽  
Xueming Shao
Keyword(s):  
Sharp Interface ◽  
Fictitious Domain ◽  
Fictitious Domain Method ◽  
Domain Method ◽  
Sharp Interface Method ◽  
Direct Forcing

USNCCM-11: Computational fluid mechanics for free and moving boundary problems

2013 ◽  
Vol 87 ◽  
pp. 1
Author(s):  
Rekha R. Rao ◽  
S.A. Roberts ◽  
David R. Noble ◽  
Patrick D. Anderson ◽  
Jean-Francois Hétu
Keyword(s):  
Fluid Mechanics ◽  
Moving Boundary ◽  
Computational Fluid Mechanics ◽  
Moving Boundary Problems ◽  
Boundary Problems
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