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RNG k-Epsilon - overflow

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Old   February 14, 2014, 09:35
Default RNG k-Epsilon - overflow
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Danijela Djuric Mijovic
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I have simple model - 100 meters high building of simple geometry in the domain (1x3x0.6 km). I need mean pressures on the building facades. The model is working good until the elements on the facades (Mesh-Face sizing) are 1.5m. When I put them to be 1m the solver make just 10 steps and I have the message: Fatal overflow in linear solver. When I switch the turbulent model from RNG k-Epsilon to k-Omega it works.
What can be the potential problems and solutions ?
Thank You in advance!
Danijela
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