Numerical simulation of the incompressible internal flow through a tilting disk valveA numerical simulation of the incompressible viscous flow through a prosthetic tilting disk heart valve is presented in order to demonstrate the current capability to model unsteady flows with moving boundaries. Both steady and unsteady flow calculations are performed by solving the incompressible Navier-Stokes equations in three-dimensional generalized curvilinear coordinates. In order to handle the moving boundary problems, the chimera grid embedding scheme which decomposes a complex computational domain into several simple subdomains is used. An algebraic turbulence model for internal flows is incorporated to reach the physiological values of Reynolds number. Good agreement is obtained between the numerical results and experimental measurements. It is found that the tilting disk valve causes large regions of separated flow, and regions of high shear.
Document ID
19900035188
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Chang, I-Dee (Stanford University CA, United States)
Rogers, Stuart E. (Stanford Univ. CA, United States)
Kwak, Dochan (NASA Ames Research Center Moffett Field, CA, United States)