# Convergance problem

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 May 23, 2012, 20:15 Convergance problem #1 New Member   Osama Join Date: Mar 2012 Posts: 26 Rep Power: 7 Hi. I have been running some simulations simple geometry. A rectangular 2D geometry with fillets and chamfers on front. domain is approx 9500mm(length) x 5000mm(height). the rectangle is 400mm(height) x 1000 mm(length). continuity residual does not converge(drop below 10e-6) even after 20,000 iterations. it varies in the range of 10e-6 and fluent does not say solution has converged ..other residuals drop to 10-8. and the Cd value does not change for more than 100 iterations.. the mesh quality is also good; cell squish varies between 0.2 to 0.55.. for example, for one case.its; Mesh Quality: Applying quality criteria for quadrilateral cells. Maximum cell squish = 3.92392e-001 Maximum aspect ratio = 2.68100e+001 I have also checked the values of wall Y+ on the rectangle and they are also approximately in the range of 30-300 as I have used standard wall function.. regards, Osama

 May 23, 2012, 22:58 #2 Super Moderator   Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,329 Blog Entries: 6 Rep Power: 45 Your solution is converged

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