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June 29, 2009, 14:52 |
Problem with iterations in Fluent
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#1 |
New Member
Iaroslav
Join Date: May 2009
Posts: 16
Rep Power: 16 |
Hi everyone,
I am having an issue with iterating my solution in Fluent. I am currently running a subsonic impingement case. I am using the density based axisymmetric solver with all boundary conditions defined. The jet is impinged on a flat plate (bottom boundary). There is also a wall around the jet exit (upper boundary). The left boundary is the axis and the right boundary is a pressure outlet. Air is used as an ideal gas with the use of the standard k-e model for turbulent flow. The issue I am having is when I start to iterate the solution, fluent gives me the following: Error: Floating point error: invalid number Error Object: () I have attached the case file with this post so you can open it and view all my initial/boundary conditions. I have double checked all my values and I am sure they are absolutely correct. I would appreciate any help on this. Thank you, Iaroslav |
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June 30, 2009, 09:49 |
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#2 |
New Member
Iaroslav
Join Date: May 2009
Posts: 16
Rep Power: 16 |
Did anyone get a chance to look at this? Are my boundary conditions incorrect? For some reason, I am able to run the simulation in 2D instead of axisymmetric, but my results are inaccurate.
Thanks, Iaroslav |
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June 30, 2009, 11:32 |
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#3 |
Member
Akour
Join Date: May 2009
Posts: 79
Rep Power: 16 |
hi,
floating point error will be something to do with your boundary conditions usually, unless u have a UDF attached, which u dont. Im assuming you are aware that for axisymmetric problems in FLUENT the axis of symmetry MUST be the y axis (I THINK!, please check this in the manual), i.e. you cant just place an axis of symmetry along any coordinate direction you want...the fact that your simulation works using a 2D solver means that you have defined that boundary incorrectly. AK |
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June 30, 2009, 11:53 |
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#4 |
New Member
Iaroslav
Join Date: May 2009
Posts: 16
Rep Power: 16 |
Hi AK,
Thanks so much for your help. It turns out that I can to rotate my domain by 90 degrees so the x-axis is my axis. -Iaroslav |
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