Again, the geometry for this example is created using the Pre-processor module of the system. First we have to create the points with the co-ordinates given below, and then join them into lines (the edges of the control volume).
Points: |
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Nº: | Coordinates: | ||
1. | -4.000000 | -3.500000 | 0.000000 |
2. | -4.000000 | 0.000000 | 0.000000 |
3. | -4.000000 | 3.500000 | 0.000000 |
4. | 9.000000 | 3.500000 | 0.000000 |
5. | 9.000000 | 0.000000 | 0.000000 |
6. | 9.000000 | -3.500000 | 0.000000 |
7. | 0.500000 | 0.000000 | 0.000000 |
8. | -0.500000 | 0.000000 | 0.000000 |
Then we create the circle representing the cylinder's section using the Copy utility (Utilities Menu) for copying the point while rotating it around a specified centre.
By choosing the Copy window options showed in Figure 21 and applying them to point Nº. 7, the point will rotate 180º around the z-axis (default for the selected "two dimensions") about the centre entered as First point. The option Do extrude: Lines results in the tracing of the upper half of the circle. In order to draw the rest of the circle, apply the same action to point Nº 8.
Figure 21 Copy window; extrude circle |
Finally the surfaces of the geometry can be created. The outcome of this process is the geometry shown in Figure 22.
Figure 22 Initial geometry for analysis |
Finally we have to create the control volume. To do this we apply again an extrusion (see Figure 23) to the planar geometry of Figure 22.
Figure 23 Copy window; extrude geometry |
The final geometry is shown in Figure 20.
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