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Fan simulation with inlet and outlet duct

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Old   June 27, 2014, 08:59
Default Fan simulation with inlet and outlet duct
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hashim chaudhry
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Hi, I am working on a simulation of axial fan with inlet and outlet duct in order to investigate the pressure drop across the fan. My fan Dia is 116 mm and i made the inlet of 300 mm, outlet of 500mm. I am using moving frame refernece for this case in which i am giving fixed rpm to a rotating region with velocity inlet and pressure outlet. The issue is whenever i run the simulation reversed flow occur and after few iterations it shows the error of floating point overflow/ kturbukence.
I am using surface remesher, segregated flow and polyhedral mesh as a mesh condition and steady, constant density with kepsilon turbulence model. I also attached the pictures of geometry, pressure and velocity results.

Please help me out I would be very thankful to you
Regards
Hashim
Attached Images
File Type: jpg geometry.jpg (40.3 KB, 56 views)
File Type: jpg pressure_plot.jpg (89.4 KB, 57 views)
File Type: jpg velocity_plot.jpg (20.6 KB, 44 views)

Last edited by chaudhry_hashim; June 27, 2014 at 09:40. Reason: add pictures
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