Existing implicit numerical methods to solve turbulent flows using k - ε models have poor convergence properties. This paper presents modifications to these methods which improve their convergence rates and reduce the computational time by about a factor of 10. We start with an implicit finite-volume method in which the mean flow and turbulence model equations are fully coupled and the turbulent source terms are linearized accurately. The convergence properties of this formulation is similar to other widely-used methods. However, all these conventional methods have numerical instabilities that result in poor convergence. These instabilities are eliminated by two modifications, which greatly improve their convergence rates.
|Original language||English (US)|
|Number of pages||12|
|State||Published - Jan 1 1998|
|Event||29th AIAA Fluid Dynamics Conference - Albuquerque, United States|
Duration: Jun 15 1998 → Jun 18 1998
|Other||29th AIAA Fluid Dynamics Conference|
|Period||6/15/98 → 6/18/98|