February 27, 2022 at 4:34 amganesh2516822Subscriber
I'm trying to find out the thrust generated by an air bearing that I've designed. For that I need to know the pressure drop across the porous graphite. Below figure shows the inlet portion of the graphite section (porous media).February 28, 2022 at 4:49 pmRobAnsys EmployeeHow well resolved is the mesh? Please plot a velocity contour across the device so we can see what's going on.
March 1, 2022 at 6:43 amganesh2516822SubscriberThank you for your response
I'll give you some mesh metrices Aspect ratio: 1.82
Orthogonal quality: 0.78
The velocity contours are given below I've a hard time believing these results since there is zero velocity throughout the entire porous medium and also the residuals starts to diverge after about 350 iterations
March 1, 2022 at 12:05 pmRobAnsys EmployeeI don't like the streaking in the lower image. Please zoom in on one of the narrow sections in the top image and replot with node values off.
March 2, 2022 at 11:43 amMarch 2, 2022 at 11:52 amRobAnsys EmployeeMore or less. Zoom in more on the higher velocity region. Top left of the contour panel you'll see an option for node values, deselect it.
March 2, 2022 at 1:58 pmMarch 2, 2022 at 2:22 pmRobAnsys EmployeeOK, that's the image I want, but do the post processing in Fluent.
March 2, 2022 at 2:36 pmMarch 3, 2022 at 2:16 pmRobAnsys EmployeeThat looks like you have only two cells across the high(er) velocity region. You want at least 6, possibly more depending on the flow.
March 4, 2022 at 3:06 amMarch 4, 2022 at 4:53 pmRobAnsys EmployeeBetter. How's the solver behaving now?
March 5, 2022 at 6:00 amMarch 7, 2022 at 5:15 pmRobAnsys EmployeeThat's a weird looking convergence plot. Try with a velocity inlet and see how it behaves.
March 8, 2022 at 6:08 amMarch 8, 2022 at 11:38 amRobAnsys EmployeeWhat are you using to initialise the model? I think you've got energy on; what is the gas density and how does the temperature field look?
March 8, 2022 at 4:52 pmViewing 16 reply threads
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