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Operation Toolpad > Geometry Command Button > Vertex Command Button > Image Removed

Create Upstream Boundary

We will first create the semi-circle upstream boundary. 

Operation Toolpad > Geometry Command Button Image Removed > Edge Command Button Image Removed > Create Edge Image Removed > Arc Image Removed > Image Removed

Input the following data and click Apply.

Create Downstream Boundaries

In creating downstream boundaries, we will use bottom up approach where we first create vertices and join the vertices to form edges.

Create vertices with following coordinates:

Operation Toolpad > Geometry Command Button Image Removed > Vertex Command Button Image Removed > Create Vertex Image Removed

Create the vertices by entering the coordinates under Global.

Click the FIT TO WINDOW button to scale the display so that you can see all the vertices.

Connect AB, BC and CD to form three edges.

Operation Toolpad > Geometry Command Button Image Removed > Edge Command Button Image Removed > Create Edge Image Removed 

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You should see have this geometry up till this step.

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Split Edges

We would like to have more mesh elements at the downstream of the flow, to the right of the cylinder. To accomplish this, we would have to split some edges.

Split the edge according to the figure shown below:

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First split the straight edges

Select appropriate edge one by one. For example, to create vertex H, we have to split the bottom edge.

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Select the vertex and associated edge. Make sure to select Split edge. At the end of this, you should have 4 new vertices

And then select the bottom edge. Enter the coordinate value for vertex H. Do this for the rest of vertices.

Now, we will split the curved edges

Operation Toolpad > Geometry Command Button Image Removed > Edge Command Button Image Removed > Split Edge Image Removed

Change the coordinate Type to Cylindrical and create vertex point F and G.

Connect all Vertices

Finally, connect all the remaining vertices KL, LM, NO, OP, FI and GJ.

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