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Direct Numerical Simulations of the Turbulent Flow over a Stratford Ramp
| Content Provider | Semantic Scholar |
|---|---|
| Author | Zhang, Liu Department, H. F. Fasely |
| Copyright Year | 2007 |
| Abstract | A numerical method is presented for Direct Numerical Simulations (DNS) of a turbulent boundary layer ow over a curved wall. The incompress-ible, unsteady Navier-Stokes equations in vorticity-velocity formulation and curvilinear coordinates are solved using compact diierences of fourth order accuracy and a fourth-order Runge-Kutta method. The resulting DNS code with a curved wall capability is compatible in code structure with a Carte-sian version of Meitz and Fasel 3], from which the new code was developed. The computational ee-ciency is also comparable to the Cartesian version. Employing this new code the turbulent boundary layer ow on a Stratford ramp was simulated. It was found that (1) a boundary layer with both strong adverse pressure gradient and curvature can be maintained close to separation over an extended distance of the Stratford ramp; and (2) the ow displays strong non-equilibrium eeects, and thus would require more advanced turbulence models for Reynolds Averaged Navier-Stokes calculations. The present numerical results agree well with experimental measurements from Elsberry et al. 15]. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://cfd.ame.arizona.edu/~hui/ps/norfolk99.ps.gz |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Computer simulation Direct numerical simulation Ethinyl Estradiol Gradient Numerical linear algebra Numerical method RAMP Simulation Software for Modelling Reliability, Availability and Maintainability Reynolds-averaged Navier–Stokes equations Runge–Kutta methods Turbulence modeling Velocity (software development) |
| Content Type | Text |
| Resource Type | Article |
