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Convergence issues with my k-w model

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Old   July 28, 2016, 20:44
Smile Convergence issues with my k-w model
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i've been using k-w sst model cause there´re separated flow in the chamber and downstream of it. I'm using y+~1 in my model but i can't achieve a residuals lower than 10-3. the inlet mass flow is around 419 kg/s of water and the pressure outlet 3e6 Pa. How you can see in the image i´m using tetraedrons cells and sweep some zones to reduce the CPU cost. pd: This is a pressure reducier system. i´m waiting for your help, Saludos.

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Old   July 30, 2016, 04:48
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Quote:
Originally Posted by pablosanchez03 View Post
i've been using k-w sst model cause there´re separated flow in the chamber and downstream of it. I'm using y+~1 in my model but i can't achieve a residuals lower than 10-3. the inlet mass flow is around 419 kg/s of water and the pressure outlet 3e6 Pa. How you can see in the image i´m using tetraedrons cells and sweep some zones to reduce the CPU cost. pd: This is a pressure reducier system. i´m waiting for your help, Saludos.

Attachment 49498

Attachment 49499
what is your skewness value?
tell the courant number you used for your simulation
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Old   July 30, 2016, 13:35
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Originally Posted by raghulvr View Post
what is your skewness value?
tell the courant number you used for your simulation
i´m using steady pressure-based model, so the model haven´t courant number i guess, the skewnees value is 0,16469. thx
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