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February 26, 2015, 06:56 |
Compatibility of gravity and rotating frame
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#1 |
Senior Member
Sangwoo Kim
Join Date: Jul 2014
Location: Seoul, South Korea
Posts: 115
Rep Power: 11 |
Hi all.
I'm simulating an underwater propeller. Cylindrical region around the propeller is made and it has its own rotating frame. (Tools > Reference Frames(right click) > New > Rotating) It may be a frozen rotor method.(I'm not sure) And I want to use gravity for hydrostatic pressure distribution. Here, can I use gravity and rotating frame at the same time? I'm going to use multiphase model for cavitation or something. And there are only 6 boundary conditions available when I activate multiphase model. wall symmetry plane flow-split outlet velocity inlet overset mesh pressure outlet Which one should I use for the far-field? Of course, only pressure outlet looks proper, but the calculation diverged if I use it. I have used other softwares, and began to learn STAR-CCM+ just a week ago. So any advice or comment(anything!!) will be very helpful. Thank you.
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February 27, 2015, 04:55 |
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#2 |
Senior Member
Sangwoo Kim
Join Date: Jul 2014
Location: Seoul, South Korea
Posts: 115
Rep Power: 11 |
Just FYI, narrow and long cylinder is not a duct, but just multi-block mesh for resolution of a water jet.
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March 1, 2015, 02:56 |
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#3 |
Senior Member
Gajendra Gulgulia
Join Date: Apr 2013
Location: Munich
Posts: 144
Rep Power: 13 |
i do not have the software at my disposal, but as far as i remember you need to select 'gravity'model under additional physics model when you set up your physics model, and then align the gravity with specified coordinate axis.
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March 3, 2015, 01:48 |
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#4 | |
Senior Member
Sangwoo Kim
Join Date: Jul 2014
Location: Seoul, South Korea
Posts: 115
Rep Power: 11 |
Quote:
My question was ambiguous. I know how to activate gravity model. What I asked was the possibility of using both of gravity and rotating frame, because I have experienced with another software that gravity and frozen rotor method cannot be used together; it diverged every time. (Of course the simulation was carried out very carefully. Gravity model worked well without rotating frame, and vice versa)
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