The INITIAL VALUES Section
The INITIAL VALUES section is used to initialize the dependent variables.
When not specifically initialized, the dependent variables are initialized to zero.
For steady state problems the INITIAL VALUES section is optional.
For time dependent problems, the INITIAL VALUES section should include a value assignment statement for each dependent variable.
Initial value statements are formed by following the dependent variable name with the assignment operator '=' and either a constant, function, expression or previously defined definition.
U = 1.0-x
Setting Initial Values from an imported table:
An intermediate name must be defined by the TABLE or TRANSFER command, and then assigned to the initial value:
U = U0
Setting Initial time derivatives:
In some problems, especially moving mesh problems, it is important to specify initial time derivatives that are not zero.
This can be done by specifying DT(variable) = expression
DT(U) = V0
See script examples :