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Old   February 28, 2007, 10:08
Default Now newtonian convergence
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Gustavo
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Hi, Im simulating a steady flow in a tube. As its a 'well-behaved' flow, i used extruded 2d simulation. For the newtonian fluid I got great results. But for the non-newtonian fluid it either doesnt converge or the results arent physically correct. How can can I get a good result? I've tried chganging the mesh, altering the inlet velocity, using other turbulence models and nothing worked. Thanks
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Old   February 28, 2007, 10:22
Default Re: Now newtonian convergence
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opaque
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Dear Gustavo,

What "non-newtonian model" are you using?

Opaque

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Old   February 28, 2007, 11:26
Default Re: Now newtonian convergence
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Gustavo
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Visc=k*y^(n-1), and I also bound the equation with a min and a max, just like in the tutorial.
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Old   February 28, 2007, 11:40
Default Re: Now newtonian convergence
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opaque
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Dear Gustavo,

I assume that "y" mean shear strain rate, and not "y coordinate".. Correct?

Opaque..

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Old   February 28, 2007, 19:27
Default Re: Now newtonian convergence
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Gustavo
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Yes...
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