Numerical Solution

5. Solution

Second Order Upwind Momentum Scheme

Solution > Solution Methods > Spatial Discretization.
Set Momentum to Second Order Upwind

Convergence Criterion

Solution > Monitors > Residuals > Edit....
Set the Absolute Criteria for continuity, x-velocity and y-velocity all to 1e-6. Click ok

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Solution > Monitors > Drag > Edit...> Create > Drag

NOTE: In ANSYS 18.2, implementing the drag monitor is slightly different. The pictures below do not match exactly with version 18.2. See this tutorial video for version 18.2.

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Then check Print to Console and Plot. Next, click cylinderwall, which is located under Wall Zones. Lastly, click ok

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Initial Guess

Solution > Solution Initialization > Standard Initialization.
Set Compute From to farfield1. Alternately, you can simply set X Velocity to 1 m/s. Then, click Initialize.

Iterate Until Convergence

Solution > Run Calculation.
Set the Number of Iterations to 2000. Then, click Calculate. (You may have to hit Calculate twice.) Now, have a cup of coffee. The solution should converge after approximately 1414 1600 iterations. NOTE: In newer versions of ANSYS, solution may converge in lesser number of iterations.

Save Project

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