Scaling the Mesh

Training Guide > Rotating System Tutorials > Moving Reference Frames Tutorial > Scaling the Mesh

Scaling the Mesh

The original grid was built using millimeters as the length unit, but no scaling factor was applied when the grid was saved in the .ccm file. As can be seen from the output produced at import, the mesh regions extend from roughly -113 to 240 units in the x-direction, -133 to 98 in the y-direction and -16 to 184 in the z-direction. Without any further action, these values will be interpreted by STAR-CCM+ as meters, which would make this a rather large fan! The region therefore needs to be scaled by a factor of 0.001 so that the dimensions are correctly specified. To do this:

Select Mesh > Scale Mesh... from the menu bar

In the Scale Mesh dialog, make sure that the Fluid and Rotating regions are in the Selected list box

Enter a value of 0.001 for the scale factor

Click Apply to scale the domain and then click Close

When the Apply button is clicked, the mesh region will be reduced in size.

Click the

(Reset) button in the toolbar to restore the previous viewing distance from the scaled domain in the display

To verify that scaling has in fact been applied, you can perform the mesh diagnostics check and review the output values.

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