# 2D---axisymmetric

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 November 28, 2010, 09:51 2D---axisymmetric #1 New Member   Eddie Join Date: Aug 2010 Posts: 8 Rep Power: 7 when I use 2D solver my case worked successfully but when I changed it to axisymmetric the following error was appeared: floating point error I should mention that I checked the boundary conditions and change them if needed. can anyone help me?

 November 28, 2010, 11:52 #2 New Member   Eddie Join Date: Aug 2010 Posts: 8 Rep Power: 7 ?????????????????????????????????????????????????? ??????? Last edited by eddiegolpesar; November 28, 2010 at 12:40.

 November 29, 2010, 08:15 #3 New Member   Join Date: Apr 2010 Posts: 13 Rep Power: 8 check that your rotation axis is in positive y-range

November 30, 2010, 06:56
#4
New Member

Eddie
Join Date: Aug 2010
Posts: 8
Rep Power: 7
Quote:
 Originally Posted by samsi check that your rotation axis is in positive y-range
Could you please explain more. where can I check it....
THanks

 November 30, 2010, 07:41 #5 Member   Join Date: Oct 2010 Posts: 44 Rep Power: 7 hey, i) you must re-orient your geometry such that it lies fully along +X, +Y, +Z i.e, nothing should go below origin in any of the planes. ii) Then before you start axisymmetric analysis in Fluent, ensure that the r,theta & z of the model lie along +Z, +Y and +X respectively For more info, refer to Fluent user guide.

 December 2, 2010, 07:58 #6 Member   JP Join Date: Mar 2009 Posts: 57 Rep Power: 10 If you used Gambit, just move the entire geometry so that your geometry is in the +x+y quadrant and reload the case.

 December 5, 2010, 03:04 #7 New Member   Join Date: Nov 2010 Posts: 19 Rep Power: 7 hi do you know that in 2D aximetry problem fluent just solve the geometries that have the axis boundary condition on x direction? for example you have a pipe and your pipe is vertical and your flow is water and come down through the pipe by force of gravity (-9.8 in y direction) when you want to solve this problem with axis boudary you must make a geometry of a horizental pipe with -9.8 gravity on x direction, you must actually rotate your geometry for 90 degree. hope you will solve your problem Last edited by m.beh; December 5, 2010 at 03:52. Reason: a misrake I make

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