The user can set a global initial condition for the simulation or through subdomain(s). Initial conditions can help solutions to converge faster so that it could save computing resources. Initial conditions define the starting values for each solution field. They play a vital role in the stability and computing time for steady-state simulations. Therefore, it is very important to define appropriate initial conditions for your simulations.

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Uniform initialization 

Before the beginning of the simulation, it assigns the prescribed value for a variable over the complete domain as the initial condition. Depending on the type of field to be initialized, the value can be a scalar or vector.

 

*For steady-state flow simulations, we recommend to set the value close to the expected solution to enhance the convergence behaviour.

 

There are four sub-section in the initial condition

 

 

 

 

 

 

 

 

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Figure 3: Initial condition sub-section