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

Forum: CFX December 1, 2013, 04:29

Replies: 15 high speed flow, phase change problem Views: 3,000 Posted By ghorrocks The root cause of this problem is much more... The root cause of this problem is much more likely to be a physical or numerical instability which is leading to temperatures less than absolute zero. This is quite common as you develop simulations...

Forum: CFX November 27, 2013, 04:32

Replies: 15 high speed flow, phase change problem Views: 3,000 Posted By ghorrocks If you have tight restrictions on mesh quality it... If you have tight restrictions on mesh quality it is going to be tough to do a 2D axisymmetric simulation. It means mesh the elements along the axis are wedges with a 2° angle and that is a terrible...

Forum: CFX November 26, 2013, 16:51

Replies: 15 high speed flow, phase change problem Views: 3,000 Posted By ghorrocks As your material properties get more complex then... As your material properties get more complex then convergence gets harder. So that makes a high quality mesh, double precision, good initial conditions and those factors even more important. I bet...

Forum: CFX November 22, 2013, 04:43

Replies: 15 high speed flow, phase change problem Views: 3,000 Posted By ghorrocks Let me quote post #2: Your post after... Let me quote post #2: Your post after it says you tried some of the things discussed, but not all. Improving mesh quality, a better initial condition and several others are important to do as...

Forum: CFX November 21, 2013, 16:48

Replies: 15 high speed flow, phase change problem Views: 3,000 Posted By ghorrocks So it sounds like you have a problem with... So it sounds like you have a problem with introducing real gas properties. This is very common, it is difficult to get these to converge at the best of times. Loosening the convergence tolerance...

Forum: CFX November 20, 2013, 16:13

Replies: 15 high speed flow, phase change problem Views: 3,000 Posted By ghorrocks You are modelling high speed compressible flow... You are modelling high speed compressible flow with phase change. You have to expect convergence difficulties with a tough model like that. If you are not familiar with how to get convergence with...

Forum: CFX November 19, 2013, 17:54

Replies: 15 high speed flow, phase change problem Views: 3,000 Posted By ghorrocks Assuming your physics is correctly set up then... Assuming your physics is correctly set up then this problem is similar to the linear solver failure error. This FAQ tells you the key things to look at:...

Showing results 1 to 7 of 7

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