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Forum: Main CFD Forum

May 3, 2013, 15:09

Replies: 10

Smaller time step results in less accuracy!!

Views: 1,661

Posted By farshadn12

That's exactly what I wasn't doing. Everything is...

That's exactly what I wasn't doing. Everything is fine now. Thanks for your response.

Forum: Main CFD Forum

May 3, 2013, 09:54

Replies: 10

Smaller time step results in less accuracy!!

Views: 1,661

Posted By farshadn12

So I was able to fix the problem and now the...

So I was able to fix the problem and now the spatial accuracy is second order. the temporal accuracy however is practically constant. It's zero order.

Forum: Main CFD Forum

April 26, 2013, 14:21

Replies: 10

Smaller time step results in less accuracy!!

Views: 1,661

Posted By farshadn12

Yes I use a projection method, Runge Kutta 3rd...

Yes I use a projection method, Runge Kutta 3rd order. Fully explicit.

Domain size is: 0 < x,y < 2*pi

Uniform grid 32x32

dt is constant. I run the case for dt = 0.001 and 0.0001 sec

Flow...

Forum: Main CFD Forum

April 26, 2013, 12:02

Replies: 10

Smaller time step results in less accuracy!!

Views: 1,661

Posted By farshadn12

Smaller time step results in less accuracy!!

Hi guys,

I'm writing a code in Fortran that solves a 2D Taylor-Green vortex problem. I'm implementing RK3 with central differences discretization in space and periodic boundary conditions...

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