Comparison between two finite‐difference schemes for computing the flow around a cylinder
Copyright policy )Comparison between two finite‐difference schemes for computing the flow around a cylinder
AbstractSeparated flow past a circular cylinder is computed from two finite‐difference Navier–Stokes models. Stream functions are calculated using a successive‐over‐relaxation (SOR) procedure. Alternating‐direction‐implicil (ADI) and ‘upwind’ directional difference explicit (DDE) numerical schemes for solving the vorticity‐transport equation are compared. The ‘upwind’ differencing technique produces artificial viscosity which damps the wake and suppresses vortex shedding. It is shown to be unreliable and so the ADI approach is recommended.
- University of Salford United Kingdom
finite-difference Navier Stokes models, Navier-Stokes equations for incompressible viscous fluids, Basic methods in fluid mechanics, vorticity-transport- equation, laminar fluid flow, first- order upwind differencing method, Implicit methods, Separated flow, alternating-direction-implicit scheme, circular cylinder, upwind directional difference explicit numerical schemes
finite-difference Navier Stokes models, Navier-Stokes equations for incompressible viscous fluids, Basic methods in fluid mechanics, vorticity-transport- equation, laminar fluid flow, first- order upwind differencing method, Implicit methods, Separated flow, alternating-direction-implicit scheme, circular cylinder, upwind directional difference explicit numerical schemes
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