NASA Technical Reports Server (NTRS) : Simulation pdf

NASA Technical Reports Server (NTRS) : Simulation

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Description of the Book:

A 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 state and unsteady flow calculations are done by solving the incompressible Navier-Stokes equations in 3-D 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

• Creator/s: NASA Technical Reports Server (NTRS
• Date: 1/1/1991
• Year: 1991
• Book Topics/Themes: NASA Technical Reports Server (NTRS), BLOOD FLOW, BOUNDARY VALUE PROBLEMS, COMPUTERIZED SIMULATION, HEART VALVES, PROSTHETIC DEVICES, SEPARATED FLOW, TURBULENCE MODELS, VALVES, COMPUTATIONAL GRIDS, EQUILIBRIUM FLOW, GRID GENERATION (MATHEMATICS), HEART, INCOMPRESSIBLE FLOW, MATHEMATICAL MODELS, NAVIER-STOKES EQUATION, REYNOLDS NUMBER, SPHERICAL COORDINATES, UNSTEADY FLOW, VISCOUS FLOW, Kiris, Cetin, Chang, I-Dee, Rogers, Stuart E., Kwak, Dochan

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