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Old   April 11, 2013, 10:09
Question Grid sensitivity question
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Hello,

I'm doing a grid sensitivity study. Hypothetically let's say I have three meshes:
- Mesh 1
- Mesh 2
- Mesh 3

Each mesh is different.

I have a transient solution for mesh 1, but not for mesh 2 or 3.

Is it acceptable to use the results from mesh 1 as the initial guess for mesh 2? Likewise is it acceptable to use the results from mesh 2 as the initial guess for mesh 3?

The alternative method is to (for all three meshes):
- Compute a solution using steady state
- Using the steady state solution as the initial guess compute the transient solution

I hope that makes sense!
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Old   April 11, 2013, 10:59
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An initial guess is just a guess, so as long as your simulation converges you should be fine with using the coarser mesh as initial guess on the finer meshes.
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Old   April 11, 2013, 11:15
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Ta muchly.
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