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

Forum: OpenFOAM Running, Solving & CFD October 1, 2014, 10:03

Replies: 29 Simulations with large time steps (high CFL) Views: 6,762 Posted By akidess I don't really use the pimple solver, so I can... I don't really use the pimple solver, so I can only guess. To me it looks like while your solution seems to be ok with the relaxation, the final result in iteration 24 is still not a great initial...

Forum: OpenFOAM Running, Solving & CFD October 1, 2014, 08:07

Replies: 29 Simulations with large time steps (high CFL) Views: 6,762 Posted By akidess Yes, I agree the methods are related, but I don't... Yes, I agree the methods are related, but I don't think that's a strong argument to assume very similar numerical behavior (side-note: similarly, you could argue first and second order time...

Forum: OpenFOAM Running, Solving & CFD October 1, 2014, 05:39

Replies: 29 Simulations with large time steps (high CFL) Views: 6,762 Posted By akidess Phillip, read Jasak's comments on transient... Phillip, read Jasak's comments on transient SIMPLE here: http://www.cfd-online.com/OpenFOAM_Discus/messages/1/1807.html Then have a look at:...

Forum: OpenFOAM Running, Solving & CFD October 1, 2014, 05:16

Replies: 29 Simulations with large time steps (high CFL) Views: 6,762 Posted By akidess Just because you apply underrelaxation and more... Just because you apply underrelaxation and more iterations does not make your PISO loop (which pimple still is) SIMPLE. You are still comparing two different algorithms which both have their pros and...

Forum: OpenFOAM Running, Solving & CFD October 1, 2014, 03:39

Replies: 29 Simulations with large time steps (high CFL) Views: 6,762 Posted By akidess Transient SIMPLE is not like Pimple (Pimple is... Transient SIMPLE is not like Pimple (Pimple is still basically PISO). The trade-off between SIMPLE and PISO is that you need to apply under-relaxation (yet another tuneable parameter!) and a lot more...

Forum: OpenFOAM Running, Solving & CFD September 18, 2013, 11:30

Replies: 29 Simulations with large time steps (high CFL) Views: 6,762 Posted By akidess Even without access to the code you should be... Even without access to the code you should be able to get everything you need from theory guides or white papers or such.

Forum: OpenFOAM Running, Solving & CFD September 18, 2013, 03:20

Replies: 29 Simulations with large time steps (high CFL) Views: 6,762 Posted By akidess Find out what makes Overflow and Fun3D faster.... Find out what makes Overflow and Fun3D faster. What algorithms do they implement? Are all other settings the same? It wouldn't surprise me if those codes implement algorithms that outperform OpenFOAM...

Showing results 1 to 7 of 7

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