Page History

...

Here, the flow field will be initialized to the values at the inlet. In order to carry out the initialization click on Solution Initialization then click on Compute from and select inlet as shown below. 

Click Here for Higher Resolution

...

FLUENT reports a residual for each governing equation being solved. The residual is a measure of how well the current solution satisfies the discrete form of each governing equation. We'll iterate the solution until the residual for each equation falls below 1e-6. In order to specify the residual criteria (Click) Monitors > Residuals > Edit..., as shown in the image below. 

Click Here for Higher Resolution

Next, change the residual under Convergence Criterion for continuity, x-velocity,and y-velocity, all to 1e-6, as can be seen below.

Click Here for Higher Resolution

...

Note that, we have to run the transient simulation to a statistically stationary state and then collect statistics. Click on Run Calculation then choose the Time Step Size(s) as 1e-05 and the Number of Time Steps  as 20000. Also choose Extrapolate Variables option (refer to FLUENT documentation for information) and leave the Max Iterations/Time Step as 20 (default). The corresponding image is shown below.

Click Here for Higher Resolution

...