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Forum: Main CFD Forum

July 19, 2013, 05:32

Replies: 7

steady for unsteady flow?

Views: 1,670

Posted By FMDenaro

Many issues can be involved...it is difficult for...

Many issues can be involved...it is difficult for me thinking about without checking details ... also the chosen tolerance for the residuals can cause differences...

Forum: Main CFD Forum

July 19, 2013, 05:17

Replies: 7

steady for unsteady flow?

Views: 1,670

Posted By FMDenaro

yes, LTE = local truncation error Note that...

yes, LTE = local truncation error

Note that when the solution becomes unsteady at some Re number, you have to prescribe a suitable BC Un+1 at the outlet, otherwise you somehow will force the...

Forum: Main CFD Forum

July 19, 2013, 04:53

Replies: 7

steady for unsteady flow?

Views: 1,670

Posted By FMDenaro

yes, I mean a time-marching integration using a...

yes, I mean a time-marching integration using a physical time-step.

Are you sure that in your implicit method the BCs for Un+1 is never required? However, implicit and explicit integration of the...

Forum: Main CFD Forum

July 19, 2013, 04:27

Replies: 7

steady for unsteady flow?

Views: 1,670

Posted By FMDenaro

I would consider a different stategy: use always...

I would consider a different stategy: use always time-marching scheme, changing the Re number you will find that the steady solution is no longer reached.

Implicit or explicit schemes of the same...

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