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Mystic error in FLUENT Solution initializtion

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Old   March 27, 2013, 10:50
Default Mystic error in FLUENT Solution initializtion
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Hi .. I created the attached geometry mode in GAMBIT and exported it in ".msh" format.
I first created the geometry as is in the pic below (Only the part above the axis .. its an axisymmetric case)




it worked 100% right....got the results....

2nd time I tried it constructing in the vertical orientation as shown below:




I gave the same BCs .. axial vel etc ..but got the following weird symbols in the initialization :




I tried to initialize manually by putting the inlet value in the initialization boxes.. but it gives "Divergence detected in AMG solver .. (for all equations if i try to change the cycle type and stability method in solutions - advanced options"

(Its v imp for my project ... after having worked so much and coming to the end of writing a huge UDF for vertical case i have come across this error! . NOTE : no udf was loaded in the above case i mentioned..its later part

Last edited by Abhya; March 28, 2013 at 08:19.
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Old   March 27, 2013, 10:56
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Can't see the images!

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Old   March 27, 2013, 16:15
Default Axis
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Axisymmetry only works in fluent when the axis of symmetry is the x-axis.
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Old   March 28, 2013, 08:24
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sry fixed the image links!
@chaosh
Thanks a lot mate! .. can I know how did u come to know about that? If im not wrong.its nowhere in the manual!
I really wonder why FLUENT COULD HAVE SUCH A RESTRICTION/FLAW!
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Old   March 28, 2013, 08:43
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It is very well documented in FLUENT documentation:

// User's Guide :: 2 // 5. Reading and Manipulating Meshes // 5.2. Mesh Requirements and Considerations // 5.2.1. Geometry/Mesh Requirements

"Axisymmetric geometries must be defined such that the axis of rotation is the x axis of the Cartesian coordinates used to define the geometry"

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Old   March 28, 2013, 14:32
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What OJ said
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