{"id":317785,"date":"2023-11-15T12:39:08","date_gmt":"2023-11-15T12:39:08","guid":{"rendered":"\/forum\/forums\/reply\/317785\/"},"modified":"2023-11-15T12:39:08","modified_gmt":"2023-11-15T12:39:08","slug":"317785","status":"publish","type":"reply","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/317785\/","title":{"rendered":"Reply To: divergence detected in AMG solver"},"content":{"rendered":"<p>&lt;p&gt;Rob,&nbsp;&lt;\/p&gt;&lt;p&gt;i should mentined here that i was modelling this system in transient state now i am running it in steady state as impeller is moving at constant speed of 10000 RPM&#8230; all parameters are stable in scaled residuals except the bins i defined in population balance balance modelling part. i intialize the case with 7 bins each bin having 0.1 value excep bin 3 o.4 but it ran for 200 iterations ad give the divergence detected at every bin . then i change the scheme to bin 20 and initialized the bins with the specific arrangement in such a way that the bin having mean particle size was assigning higher values than other even now solver is not initiaing and at the begining giving the divergence detected in 3 to 20 bins and not the 1st two bins please guide&#8230; i think i just need to adjust the bins arrangements because all other parameters shows more or less straight line even in monitors all parameters like vol frac and number density is stable. if you have any suggestion on arranging the bin sizes then please help&lt;\/p&gt;&lt;p&gt;&nbsp;&lt;\/p&gt;&lt;p&gt;thank you&nbsp;&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-317785","reply","type-reply","status-publish","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"Rob, i should mentined here that i was modelling this system in transient state now i am running it in steady state as impeller is moving at constant speed of 10000 RPM... all parameters are stable 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