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/UPWM/TG |
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/UPWM/TG |
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»Click here to display Table of Contents«
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/UPWM/TG |
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/UPWM/TG |
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/UPWM/TG - Upwind Method for Momentum Advection
Description
Describes the Taylor Galerkin method for momentum advection. This method is not available with multi-material law 51 (/MAT/MULTIMAT).
Format
/UPWM/TG
Data |
Description |
fac |
Coefficient for upwind term. Default = 1.00 (Comment 3) |
| 1. | A Taylor development is applied on velocity vector and substituted in Navier Stokes equations. Integration is performed using standard Bubnov Galerkin integration. This introduces terms with a streamline character. Assumption is made that viscous stress is negligible (high Reynolds number). This is also not valid for stationary cases. |
| 2. | If this keyword is used, the usual upwind method for momentum advection (defined with coefficient  1 from /UPWIND) is replaced. |
| 3. | Best results are obtained for: |
Where, M is the Mach number. Which means for subsonic simulation, coefficient fac > 1 is advised. The original TG method is obtained for fac = 1.00 and does not take into account compressibility for stability time step (upwind term is proportional to it).
| 4. | The /SUPG and /TG options are available in 3D Euler, 3D ALE and 2D Euler, although they are not recommended in axisymmetric cases. |
See Also: