IngentaConnect Studies of Turbulence Models in a Computational Fluid Dynamics Mo...

Authors: Song X.; Wood H.G.¹; Day S.W.¹; Olsen D.B.²

Source: Artificial Organs, Volume 27, Number 10, October 2003 , pp. 935-937(3)

Abstract:

Computational fluid dynamics (CFD) is used widely in design of rotary blood pumps. The choice of turbulence model is not obvious and plays an important role on the accuracy of CFD predictions. TASCflow (ANSYS Inc., Canonsburg, PA, U.S.A.) has been used to perform CFD simulations of blood flow in a centrifugal left ventricular assist device; a k- epsiv

model with near-wall functions was used in the initial numerical calculation. To improve the simulation, local grids with special distribution to ensure the k- ohgr

model were used. Iterations have been performed to optimize the grid distribution and turbulence modeling and to predict flow performance more accurately comparing to experimental data. A comparison of k- ohgr

model and experimental measurements of the flow field obtained by particle image velocimetry shows better agreement than k- epsiv

model does, especially in the near-wall regions.

Keywords: Computational fluid dynamics; Turbulence model; Blood pump

Document Type: Research article

DOI: 10.1046/j.1525-1594.2003.00025.x

Affiliations: 1: Department of Mechanical and Aerospace Engineering, University of Virginia, Charlottesville, VA; and 2: Utah Artificial Heart Institute, Salt Lake City, UT, U.S.A.

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Studies of Turbulence Models in a Computational Fluid Dynamics Model of a Blood Pump