458

RWTH Publication No: 674007 2016 IGPM458.pdf 
TITLE 
Fluidstructure coupling of linear elastic model with compressible flow models 
AUTHORS 
Michael Herty, Siegfried Müller, Nils Gerhard, Gaoming Xiang, Bing Wang 
ABSTRACT 
A novel coupling strategy for the simulation of fluidstructure interactions is introduced. The strategy is motivated by recent work on coupling of flows on networks. Here the novelty is to use an explicit approach rather an implicit approach that avoids costly nested iterations where the fluid solver and the solid solver are called alternatingly. This concept is exemplified for the coupling of a linear elastic structure with an ideal gas. The coupling procedure relies on the solution of a nonlinear equation. Existence and uniqueness of the solution is proven. The coupling conditions are validated by means of quasi1D problems for which an explicit solution can be determined. For a more realistic scenario a 2D application is considered where a hot gas bubble at low pressure collapses in a cold gas at high pressure near an adjacent structure. 
KEYWORDS 
fluidstructure interaction, coupling conditions, linear elastic model, compressible flow 
DOI 
10.1002/fld.4422 
PUBLICATION 
International Journal for Numerical Methods in Fluids (IJNMF)(br/>
Volume 84, Issue 5, Pages 268–291, 2017
