# Amg solver x-momentum problem

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 April 20, 2014, 10:54 Amg solver x-momentum problem #1 New Member   Rio de Janeiro Join Date: Apr 2014 Posts: 2 Rep Power: 0 Hi, my name is Lucas and Im learing how to use fluent. My teacher gave to us a mesh and all the step-by-step to solve the problem, but when i calculate, appear that error: Error: Divergence detected in AMG solver: x-momentum Error Object: #f I read another posts about it, but i didnt solve it yet. I dont know where i find "under relaxation factor" to reduce (one solution that a saw). So, could someone help me and explain step-by-step to solve this problem? Thanks

April 21, 2014, 09:51
#2
Senior Member

shoeb khan
Join Date: Nov 2011
Posts: 179
Rep Power: 5
Quote:
 Originally Posted by lucascluz92 Hi, my name is Lucas and Im learing how to use fluent. My teacher gave to us a mesh and all the step-by-step to solve the problem, but when i calculate, appear that error: Error: Divergence detected in AMG solver: x-momentum Error Object: #f I read another posts about it, but i didnt solve it yet. I dont know where i find "under relaxation factor" to reduce (one solution that a saw). So, could someone help me and explain step-by-step to solve this problem? Thanks
Dear Lucas

Kindly explain your problem, then i may suggest you something.

Regards
shk

 April 23, 2014, 17:17 Problem explanation #3 New Member   Rio de Janeiro Join Date: Apr 2014 Posts: 2 Rep Power: 0 My problem is 2D, transient,axisymmetric. I have to analyze the oil cooling process along the tube. I have the temperatures in each wall of the tube and all proprieties of the oil. I have to simulate 10 hours, so i put my time step 100 and number of time steps 360, to get 36000 seconds (10 hours). So, I put all this parameters on Fluent, but appear that error said above. Which parameters I have to change to solve this problem and run the program correctly? Sorry about my bad explanation

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