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Forum: Main CFD Forum

August 5, 2011, 03:03

Replies: 18

flat residuals

Views: 2,370

Posted By cfdnewbie

wouldn't that only help with the initial phase of...

wouldn't that only help with the initial phase of the flow, i.e. the disturbances due to initialization? If the physics are indeed unsteady, then after some time the fluctuations will start to build...

Forum: Main CFD Forum

August 5, 2011, 03:01

Replies: 18

flat residuals

Views: 2,370

Posted By cfdnewbie

If your problem worsens as you refine the grid,...

If your problem worsens as you refine the grid, that is because you are capturing more waves on a finer/higher order grid....
so there are two options:
a) your problem is inherently unsteady, that...

Forum: Main CFD Forum

August 4, 2011, 02:33

Replies: 18

flat residuals

Views: 2,370

Posted By cfdnewbie

Thoughts about your prob: a) what kind of...

Thoughts about your prob:

a) what kind of scheme are you using? FV? Explicit or implicit?

b) If your O1 solution looks steady, and your O2 doesnt, then it means just that the O2 captures more...

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