Page 432 - TransAT_Tutorial_Manual

TransAT Tutorial Manual 10.3. Droplet Impact on a Flat Plate

Simulation Parameters
This tab is used to define the numerical properties of the simulation.

Simulation Type and Control Parameters

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

• Set the following parameters to solve for an unsteady flow

Simulation Type : Unsteady
Time scheme : Euler 1 st Order

Control Parameters
Total Simulation Time : 0.02
Max Number of Time Steps : 3000
I n i t i a l Time Step : 0.01
Max number of i t e r a t i o n s per Time Step : 20

ENABLE Autorelaxation
Relaxation Factor : 0.6

• 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 : 0.5 Max: 1.0
Surface Tension Min : 0.2 Max: 0.5

• In the Equations section, select All Quantities in the equation tree

• Set Convergence Tolerance to 1e-2

Initial Conditions
In this tab simple initial conditions can be set. In this case, initial values of the velocity
components will be set along the pressure. The distance function of the Level-Set method will
be set up later on in the tutorial using user-defined initial conditions.

• Select the Initial Conditions tab on the left-hand side of the TransAT user interface

• Click U-Velocity in the quantity tree

• Set Method to Constant and Value to 0.4

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