Page 336 - TransAT_Tutorial_Manual

TransAT Tutorial Manual 7.3. Oilspill

Autorelaxation : ON
Relaxation Factor : 0.67

• For Time Stepping select Adaptive then click

• Set the following parameters in the Adaptive Time-Stepping window then click to save
the settings and close the window

CFL Limits Min : 0.6 Max: 1.0
D i ff u s i o n Min : 0.6 Max: 1.0

Equations
In this tab the convergence threshold is defined, as well as the convection scheme and the
solvers used by TransAT.

• Select Pressure in the equation tree and modify the parameters as follows
Convergence Tolerance : 1e−2
Solver : AMG, R−cycle Adaptive
Max Solver I t e r a t i o n s : 10
BMR I t e r a t i o n s : 10
Relative Solver Tolerance : 0.1

• Select Other Variables in the equation tree and modify the parameters as follows
Convergence Tolerance : 1e−2
Solver : GMRES
Preconditioner : Block Jacobi
Subpreconditioner : ILU
Max Solver I t e r a t i o n s : 60
BMR I t e r a t i o n s : 5
Relative Solver Tolerance : 0.01

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