Step 6: Solution: Steady Flow

  In this step, you will generate a steady-state flow solution that will be used as an initial condition for the time-dependent solution.

1.   Set the solution parameters.

Solution Methods

(a)   Retain all default discretization schemes in the Solution Methods task page.

  This problem has been found to converge satisfactorily with these default settings.

2.   Set the relaxation factors.

Solution Controls

(a)   Retain the default values for Under-Relaxation Factors in the Solution Controls task page.

3.   Enable the plotting of residuals during the calculation.

Monitors Residuals Edit...

(a)   Make sure Plot is enabled in the Options group box.

(b)   Click OK to close the Residual Monitors dialog box.

4.   Initialize the solution.

Solution Initialization

(a)   Select inlet from the Compute From drop-down list.

(b)   Click Initialize in the Solution Initialization task page.

5.   Save the case file ( valve_init.cas.gz).

File $\rightarrow$ Write $\rightarrow$ Case...

6.   Start the calculation by requesting 150 iterations.

Run Calculation

  The solution converges in approximately 100 iterations.

7.   Save the case and data files ( valve_init.cas.gz and valve_init.dat.gz).

File $\rightarrow$ Write $\rightarrow$ Case & Data...