Journal of Fluids and Structures, Volume 27, Issue 8, November 2011, Pages 1376-1391
R.L. Campbell, E.G. Paterson
Fluids and Structural Mechanics Office, Applied Research Laboratory, The Pennsylvania State University, PO Box 30, State College, PA 16804, USA
Abstract
Large deformations of the highly flexible pump impellers result in a strong coupling between the impeller and fluid flow. The computational method therefore requires simultaneous solution of fluid flow and structural response. OpenFOAM provides the flow and mesh motion solvers and is coupled to a structural solver in a tightly coupled approach using a fixed-point iteration. The structural deformations are time-dependent because the material exhibits stress relaxation. The time-constant of the relaxation, however, is very large, thereby allowing quasi-steady simulations.
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