Page 150 - TransAT_Tutorial_Manual

TransAT Tutorial Manual 4.2. Sloshing

4.2.5.3 Simulation Parameters Tab
• Click Simulation Parameters on the left-hand side of the TransATUI

• Set the following parameters to solve for an unsteady flow with an implicit method.
Simulation Type : Unsteady
Time scheme : Euler 1 st Order
Control Parameters
Total Simulation Time : 1500
Max Number of Time Steps : 1000
I n i t i a l Time Step : 0.002
Max number of i t e r a t i o n s per timestep : 30

ENABLE Autorelaxation
Relaxation Factor : 0.8

• 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 : 0.15 Max : 0.30
D if fu s i o n Min : 0.15 Max : 0.30
Surface Tension Min : 0.15 Max : 0.30

4.2.5.4 Equations Section

• Select Other Variables in the equation tree and set the value of Convergence Tolerance
as follows:

Convergence Tolerance : 0.001

• Select Pressure in the equation tree then set the following value for Convergence Toler-
ance

Convergence Tolerance : 0.01
Solver : AMG R−cycle , Adaptive

c
Ascomp AG Switzerland 140 Version 5.7