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-   -   Mystic error in FLUENT Solution initializtion (http://www.cfd-online.com/Forums/fluent/115284-mystic-error-fluent-solution-initializtion.html)

Abhya March 27, 2013 10:50

Mystic error in FLUENT Solution initializtion
 
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)

http://2imgs.com/2i/t/5aac2f05d6.jpg

http://img44.imagehaven.net/img.php?...ZX2M_suraj.png
it worked 100% right....got the results....

2nd time I tried it constructing in the vertical orientation as shown below:
http://2imgs.com/2i/t/fef97a5083.jpg


http://img44.imagehaven.net/img.php?...S16UYL3_my.png
I gave the same BCs .. axial vel etc ..but got the following weird symbols in the initialization :
http://2imgs.com/2i/t/abac2f05d6.jpg

http://img22.imagehaven.net/img.php?...8JGP_error.png

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

oj.bulmer March 27, 2013 10:56

Can't see the images!

OJ

chaosh March 27, 2013 16:15

Axis
 
Axisymmetry only works in fluent when the axis of symmetry is the x-axis.

Abhya March 28, 2013 08:24

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!

oj.bulmer March 28, 2013 08:43

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"

OJ

chaosh March 28, 2013 14:32

What OJ said


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