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Showing results 1 to 7 of 7 Search took 0.00 seconds. Search: Posts Made By: FMDenaro

Forum: Main CFD Forum May 23, 2012, 13:52

Replies: 27 Pressure correction in fractional step method Views: 3,534 Posted By FMDenaro do you modify congruently near the boundaries the... do you modify congruently near the boundaries the source term in the Poisson equation?

Forum: Main CFD Forum May 22, 2012, 03:41

Replies: 27 Pressure correction in fractional step method Views: 3,534 Posted By FMDenaro be careful ... for Neumann conditions, the matrix... be careful ... for Neumann conditions, the matrix is singular but you have to fulfill the compatibility relation (that involves BCs) such that the system admits infinite solutions...this is an issue...

Forum: Main CFD Forum May 16, 2012, 17:29

Replies: 27 Pressure correction in fractional step method Views: 3,534 Posted By FMDenaro is not a problem if you then compute Vn+1=... is not a problem if you then compute Vn+1= V* - Grad P In any case, I am quite sure you have problems in setting pressure BCs ... you must write Div (Grad P) and substitute n.Grad P at...

Forum: Main CFD Forum May 16, 2012, 17:16

Replies: 27 Pressure correction in fractional step method Views: 3,534 Posted By FMDenaro maybe the time step is simply inserted in the P... maybe the time step is simply inserted in the P variable ...

Forum: Main CFD Forum May 14, 2012, 11:43

Replies: 27 Pressure correction in fractional step method Views: 3,534 Posted By FMDenaro The pressure equation must be discretized from... The pressure equation must be discretized from the Div Grad (*) operators, you should not use the Laplace operator. This allows you to substitute the correct BC in terms of the normal component of...

Forum: Main CFD Forum May 14, 2012, 11:19

Replies: 27 Pressure correction in fractional step method Views: 3,534 Posted By FMDenaro Are you using an exact or approximate projection... Are you using an exact or approximate projection method? You must be careful in the inner-outer product of discretized divergence-gradient operators

Forum: Main CFD Forum May 14, 2012, 03:44

Replies: 27 Pressure correction in fractional step method Views: 3,534 Posted By FMDenaro did you check if your method is divergence-free... did you check if your method is divergence-free in Cartesian coordinates? fractional step is a method to split pressure and velocity in the time integration, the system of coordinate is not involved

Showing results 1 to 7 of 7

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