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Mesh

In this section the geometry will be meshed with 18,432 elements. The geometry will be given 192 circumferential divisions and 96 radial divisions. Mapped face meshing will be used and biasing will be used in order to significantly increase the number of elements located close to the cylinder.

Launch Mesher

(Double Click) Mesh

Mapped Face Meshing

(Right Click) Mesh > Insert > Mapped Face Meshing
Set Geometry to both portions of the surface body. You will have to hold down control in the selection process in order to highlight both halves. Click Update.

Circumferential Edge Sizing

(Right Click) Mesh > Insert > Sizing
Set Geometry to both edges of the surface body. You will have to use the edge selection filter and you will have to hold down control in the selection process in order to highlight both halves. Set Type to Number of Divisions, set Number of Divisions to 96 and set Behavior to Hard. Click Update to generate the new mesh.

Radial Edge Sizing 1 (Top Half)

(Right Click) Mesh > Insert > Sizing
Set Geometry to the top half of the bisecting line. Set Type to Number of Divisions, set Number of Divisions to 96 and set Behavior to Hard. Then, set Bias Type to the first option and set Bias Factor to 460. These selections are shown in the image below.

Radial Edge Sizing 2 (Bottom Half)

(Right Click) Mesh > Insert > Sizing
Set Geometry to the bottom half of the bisecting line. Set Type to Number of Divisions, set Number of Divisions to 96 and set Behavior to Hard. Then, set Bias Type to the second option and set Bias Factor to 460. These selections are shown in the image below.



Then, click Update to generate the new mesh. You should obtain the mesh, that is shown below.

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Verify Mesh Size

(Click) Mesh > (Expand) Statistics
You should have 18,624 nodes and 18,432 elements.

Create Named Selections

In this section the various parts of the geometry will be named according to the image below.

First create a named selection for the left half of the outer boundary and call it "farfield1". To create the named selection, choose the edge selection filter ,Then choose the left half of the outer boundary. After the edge is chosen, it should appear to be green. Then right click and select "Create Named Selection". In the new window that appears, type in farfield1 and select "OK" to confirm.

Next, similarly create a named selection for the right half of the outer boundary and call it "farfield2".  Create a named selection for both sides of the inner circle(cylinder) and call it "cylinderwall". When creating the third named selection, make sure that you included both halves of the circle. You will have to hold down control to select both edges.

Lastly, create a named selection for the flow domain. Select the face of the flow domain between the cylinder wall and farfield1 and farfield2 and call it "flowdomain". 

Save Project; Close ANSYS Mesher.

Go to Step 4: Physics Setup

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