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Strategy for Creating Geometry

We know that To model this flow, we need a cylinder and farfield boundaries. We also know that there will be active regions around cylinder need finer meshes around the cylinder to capture the active region (call this radius of influence). Therefore we would want the area around cylinder to be of finer mesh. We also know Downstream of the flow, there will be wake downstream of the flow behind the cylinder. Therefore we also want finer mesh around that region. Figure below shows the number of faces required to make such meshgenerated by the cylinder, which requires finer mesh to better capture this phenomena. To be able to specify such regions, we split the model into different faces as shown below.

We set the geometry upstream to be shorter because we have less activity around the regionbefore flow through cylinder. We set the geometry downstream of the cylinder to be relatively longer because we would like to capture the activity of the wake induced by the cylinderwant to make sure that the downstream farfield boundary is not affected by the wake generated.

Create a Working Directory

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