Problem with k-omega turbulence model

chripasch · December 6, 2016, 08:39

Dear experts,
when trying to simulate a "standard" free-surface flow situation with the k-omega turbulence model of FLOW-3D (v11.1), the following error occurs directly after preprocessing the simulation:

"fatal error, negative discriminant in quadratic solver 5.3174747E-01x^2 +x + NaN = 0.

Abnormal exit from solver"

The simulation stops afterwards. With the standard k-epsilon as well as with the RNG turbulence model, the simulation finishes without problems.

Do you have an idea how to solve the problem?
Thanks in advance and best regards

thunde47 · December 9, 2016, 12:30

Send over your prepin please. Thanks.

December 6, 2016, 08:39	Problem with k-omega turbulence model	#1
chripasch Member Chris Join Date: Jun 2014 Posts: 39 Rep Power: 12	Dear experts, when trying to simulate a "standard" free-surface flow situation with the k-omega turbulence model of FLOW-3D (v11.1), the following error occurs directly after preprocessing the simulation: "fatal error, negative discriminant in quadratic solver 5.3174747E-01x^2 +x + NaN = 0. Abnormal exit from solver" The simulation stops afterwards. With the standard k-epsilon as well as with the RNG turbulence model, the simulation finishes without problems. Do you have an idea how to solve the problem? Thanks in advance and best regards

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December 9, 2016, 12:30		#2
thunde47 Senior Member thunde47 Join Date: Dec 2015 Location: India, USA Posts: 133 Blog Entries: 1 Rep Power: 11	Send over your prepin please. Thanks.