Negative initial temperatures using buoyantSimpleFoam

CFDave_ · November 4, 2020, 11:03

Hi,

I'm getting a Fatal error using buoyantSimpleFoam, with negative initial values. I first used a simple geometry were the Simulation ran fine. After extending the geometry to an S like shape with a longer inlet and outlet I am suddenly getting negative temperatures and an unusual pressure field.

I have atechd a file with the boundary conditions and a plot of the pressure Field.

I am guessing the problems are the boundary conditions,

i would be greatfull for any help.

bineet_aero · November 4, 2020, 11:21

check your mesh !!! i faced the same error for almost similar problem, got rid of the error by improving my mesh without making any other change

CFDave_ · November 4, 2020, 12:02

thanks for the quick reply, I already checked, I also get a strange pressure field and no flow with a perfect mesh.

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November 4, 2020, 11:21		#2
bineet_aero Member Bineet Mehra Join Date: Aug 2013 Posts: 61 Rep Power: 13	check your mesh !!! i faced the same error for almost similar problem, got rid of the error by improving my mesh without making any other change

November 4, 2020, 12:02		#3
CFDave_ New Member David Join Date: Nov 2020 Posts: 5 Rep Power: 6	thanks for the quick reply, I already checked, I also get a strange pressure field and no flow with a perfect mesh.