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JCPHY
2011

Numerically stable fluid-structure interactions between compressible flow and solid structures

8 years 1 months ago
Numerically stable fluid-structure interactions between compressible flow and solid structures
We propose a novel method to implicitly two-way couple Eulerian compressible flow to volumetric Lagrangian solids. The method works for both deformable and rigid solids and for arbitrary equations of state. The method exploits the formulation of [11] which solves compressible fluid in a semi-implicit manner, solving for the advection part explicitly and then correcting the intermediate state to time tn+1 using an implicit pressure, obtained by solving a modified Poisson system. Similar to previous fluid-structure interaction methods, we apply pressure forces to the solid and enforce a velocity boundary condition on the fluid in order to satisfy a no-slip constraint. Unlike previous methods, however, we apply these coupled interactions implicitly by adding the constraint to the pressure system and combining it with any implicit solid forces in order to obtain a strongly coupled, symmetric indefinite system (similar to [17], which only handles incompressible flow). We also show t...
Jón Tómas Grétarsson, Nipun K
Added 15 Sep 2011
Updated 15 Sep 2011
Type Journal
Year 2011
Where JCPHY
Authors Jón Tómas Grétarsson, Nipun Kwatra, Ronald Fedkiw
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