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Forum: Main CFD Forum

April 30, 2013, 04:16

Replies: 10

Smaller time step results in less accuracy!!

Views: 1,661

Posted By FMDenaro

yes, this one can be complementary ...

yes, this one can be complementary

http://onlinelibrary.wiley.com/doi/10.1002/fld.598/abstract

Forum: Main CFD Forum

April 30, 2013, 03:27

Replies: 10

Smaller time step results in less accuracy!!

Views: 1,661

Posted By FMDenaro

I analyzed these problems in some papers...

I analyzed these problems in some papers published some years ago on IJNMF. You can find many figures about the accuracy analysis ;)

Forum: Main CFD Forum

April 26, 2013, 14:35

Replies: 10

Smaller time step results in less accuracy!!

Views: 1,661

Posted By FMDenaro

Ok, follow these steps: 1) fix a uniform 128...

Ok, follow these steps:

1) fix a uniform 128 x 128 grid
2) compute the maximum error for dt=0.1, 0.05, 0.01, 0.05, 0.001
3) plot the error versus the dt in a double logarithmic scale.
4) repeat...

Forum: Main CFD Forum

April 26, 2013, 12:26

Replies: 10

Smaller time step results in less accuracy!!

Views: 1,661

Posted By FMDenaro

Hi, first, could you give these details? ...

Hi,
first, could you give these details?

1) what about the formulation you use, is it a projection method?
2) how do you perform the accuracy analysis, do you take dt/h constant (and in the...

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