Page 190 - TransAT_Tutorial_Manual

TransAT Tutorial Manual 4.5. Spillway

4.5.8 Input Tab

To set up the simulation parameters

• Click Input at the top of the TransATUI

Physical Models
In the Physical Models tab, the models that will be used during the simulation are chosen.
• Select the following equations in the Basic Equations section
Basic Equations :
Pressure : ON
U v e l o c i t y : ON
V v e l o c i t y : ON
W v e l o c i t y : ON
Temperature : OFF
Concentration : OFF

• In the Models and Properties section activate Turbulence Modelling and set the model
V-LES (drop-down list). In the V-LES set V-LES filter width to 0.01 m.

• Activate Gravity and click to the right.

• Set the following parameters in the Gravity window them click to save the settings
x : 0.0
y : −9.81
z : 0.0
CHECK Hydrostatic

• In the Multiphase section activate Phase Average and set the model (drop-down list) to
Algebraic Slip Model

• Click , set the following parameters then click
Number of phases : 2
Pressure gradient approximation : Hydrostatic
Activate turbulent d i s p e r s i o n : ON

Phase Properties
In the Phase Properties tab, the physical properties of the different phases are defined.
• To define the first phase, under Phase 1 choose Air in the Material Library drop-down
list.

• Proceed similarly to set the fluid of Phase 2 as Water Liquid

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