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Showing results 1 to 5 of 5 Search took 0.00 seconds. Search: Posts Made By: FMDenaro

Forum: Main CFD Forum March 22, 2017, 16:51

Replies: 13 Discrepancy in the Strouhal number of a flow past circular cylinder Views: 1,343 Posted By FMDenaro No, you have to consider the approximation of the... No, you have to consider the approximation of the first time derivative, not the increment, and the derivative is O(dt)

Forum: Main CFD Forum March 22, 2017, 15:24

Replies: 13 Discrepancy in the Strouhal number of a flow past circular cylinder Views: 1,343 Posted By FMDenaro That's not so simple! You will run much more... That's not so simple! You will run much more time-steps that cumulate a certain final error. First order time integration is not suitable for transient problems.

Forum: Main CFD Forum March 22, 2017, 06:59

Replies: 13 Discrepancy in the Strouhal number of a flow past circular cylinder Views: 1,343 Posted By FMDenaro just to add that the boundaries of the domain... just to add that the boundaries of the domain should be located quite far such to not interfer with the flow

Forum: Main CFD Forum March 22, 2017, 06:38

Replies: 13 Discrepancy in the Strouhal number of a flow past circular cylinder Views: 1,343 Posted By FMDenaro I do not understand your type of discretization,... I do not understand your type of discretization, it is not clear the stencil you are using. Then, first order accuracy in time ( O(dt) ) is totally inadeguate for a transient simulation and introduce...

Forum: Main CFD Forum March 21, 2017, 17:19

Replies: 13 Discrepancy in the Strouhal number of a flow past circular cylinder Views: 1,343 Posted By FMDenaro You a-priori should know if your discretization... You a-priori should know if your discretization has artificial viscosity, no matter of how many solutions you try to discover... Artificial viscosity is a consequence of a non-symmetric...

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