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Showing results 1 to 14 of 14 Search took 0.00 seconds. Search: Posts Made By: Mina_Shahi

Forum: CFX August 20, 2012, 12:55

Replies: 36 convergence for transient/steady state simulation Views: 21,049 Posted By Mina_Shahi I hope i can get better results , thanks for all... I hope i can get better results , thanks for all your answers

Forum: CFX August 20, 2012, 03:08

Replies: 36 convergence for transient/steady state simulation Views: 21,049 Posted By Mina_Shahi Yes that is true what i meant from last... Yes that is true what i meant from last post was that in the case of hot flow in reality we have unstable condition and flow may be asymmetric as well but in the case of cold flow i am not sure ...

Forum: CFX August 20, 2012, 02:35

Replies: 36 convergence for transient/steady state simulation Views: 21,049 Posted By Mina_Shahi Thank you for the answer, in the case of... Thank you for the answer, in the case of hot flow (with combustion) yrs but when it is cold no i don't think so :(

Forum: CFX August 19, 2012, 11:11

Replies: 36 convergence for transient/steady state simulation Views: 21,049 Posted By Mina_Shahi Hi i understood when i use inflation layer... Hi i understood when i use inflation layer high-skewed cells and quality of mesh decreases while without inflation layer the quality is very good skewness is very low and ... but without...

Forum: CFX August 16, 2012, 08:07

Replies: 36 convergence for transient/steady state simulation Views: 21,049 Posted By Mina_Shahi yes i know the maximum skewness is high for... yes i know the maximum skewness is high for unstructured mesh, but not for structured grid. and ok ok Ok is what CFX solver gives me for structured. for unstructured as i told before it shows (!)

Forum: CFX August 16, 2012, 08:02

Replies: 36 convergence for transient/steady state simulation Views: 21,049 Posted By Mina_Shahi Sure , but probably you would say the same for... Sure , but probably you would say the same for this one :) becasue i already knew that the results by using this mesh are very bad 15209

Forum: CFX August 16, 2012, 04:22

Replies: 36 convergence for transient/steady state simulation Views: 21,049 Posted By Mina_Shahi 15203 this shows that the quality of my... 15203 this shows that the quality of my mesh is ok at least for structured case.

Forum: CFX August 16, 2012, 03:21

Replies: 36 convergence for transient/steady state simulation Views: 21,049 Posted By Mina_Shahi what can i do? i have very narrow space 3 mm and... what can i do? i have very narrow space 3 mm and over there i need some elements, or in the fulel inlet i have 1 mm dimension , which i need some elements there ... on the other hand if i want to...

Forum: CFX August 15, 2012, 08:18

Replies: 36 convergence for transient/steady state simulation Views: 21,049 Posted By Mina_Shahi this is the geometry i am dealing with: ... this is the geometry i am dealing with: 15194 15193 i have two inlets: one is for ch4 (mass flow rate is defined) and one is for air (velocity is given) i have outlet which is zero...

Forum: CFX August 15, 2012, 04:04

Replies: 36 convergence for transient/steady state simulation Views: 21,049 Posted By Mina_Shahi Thanks for the answer, But i don't think that... Thanks for the answer, But i don't think that it is just because of quality. the flow in really is unstable due to acoustic and if you monitor pressure inside the chamber you will see pressure...

Forum: CFX August 14, 2012, 08:55

Replies: 36 convergence for transient/steady state simulation Views: 21,049 Posted By Mina_Shahi Dear Glenn the graph i showed is relatet to... Dear Glenn the graph i showed is relatet to the coarser mesh, but you can see assymetric behaviour for finer mesh as well you can see in this attached graph comparing the velocity profile for...

Forum: CFX August 14, 2012, 08:29

Replies: 36 convergence for transient/steady state simulation Views: 21,049 Posted By Mina_Shahi 15162 this figure shows the convergence of... 15162 this figure shows the convergence of model by using structured mesh

Forum: CFX August 14, 2012, 08:26

Replies: 36 convergence for transient/steady state simulation Views: 21,049 Posted By Mina_Shahi 15161 15160 after 100 iteration... 15161 15160 after 100 iteration you can see a sudden change this is because of changing from upwind to high resolution scheme . as i mentioned with high resolution i didn't have...

Forum: CFX August 14, 2012, 04:33

Replies: 36 convergence for transient/steady state simulation Views: 21,049 Posted By Mina_Shahi Hi Glenn I am simulating a mixing flow... Hi Glenn I am simulating a mixing flow inside a chamber (with rectangular cross section) I used SST turbulence model for steady state simulation. and i used two king of mesh : structural and...

Showing results 1 to 14 of 14

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