Page 75 - TransAT_Tutorial_Manual

TransAT Tutorial Manual 2.2. Flow over a group of Buildings

• Set the BMR Iterations and the Relative Solver Tolerance values to the following
BMR I t e r a t i o n s : 10
Relative Solver Tolerance : 0.1

• Select Other Variables in the Equation tree

• Set the Convergence Tolerance value to the following
Convergence Tolerance : 1.0 e−2

• Set the BMR Iterations and the Relative Solver Tolerance values to the following

BMR I t e r a t i o n s : 10
Relative Solver Tolerance : 0.01

Initial Conditions
In this tab simple initial conditions can be set. In this case, initial values for all the relevant
quantities will be set to 0 except the velocity component in the x-direction.

• 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 1

• Proceed as above to set the initial state of the remaining quantities as follows

V−Velocity
Method : Constant
Value : 0

W−Velocity
Method : Constant
Value : 0

Pressure
Method : Constant
Value : 0
TKE
Method : Automatic
Epsilon
Method : Automatic

c
Ascomp AG Switzerland 65 Version 5.7