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confusion in specifying domain flow direction and results |
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February 26, 2015, 01:59 |
confusion in specifying domain flow direction and results
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#1 |
New Member
ashwani
Join Date: Feb 2015
Posts: 15
Rep Power: 11 |
hi,
i m doing a problem on steam flow across a rotor blade at inlet i have used the flow direction as normal to boundary condition, but how can i provide an angle for steam flow at inlet ( picture attached) also in results for velocity, i m getting a vortex or reversed flow kind of situation across fluid domain, is there something wrong or it is ok ( picture attached) thankyou |
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February 26, 2015, 02:01 |
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#2 |
New Member
ashwani
Join Date: Feb 2015
Posts: 15
Rep Power: 11 |
domain picture
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February 26, 2015, 05:21 |
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#3 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,862
Rep Power: 144 |
I see lots of major issues:
* You appear to be modelling the blade as a solid region. You do not need to do this unless you intend to model heat transfer in the blade. Most people model blades as a hollow in the fluid domain. Refer to the tutorials for how to set this up. * Your top and bottom boundaries do not appear to be periodic boundaries. Refer to the tutorials for how to set this up. * You will get massive separations if you run the device far from its design operating point. But only worry about this point after you have fixed up the other two points. |
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February 27, 2015, 11:29 |
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#4 |
New Member
ashwani
Join Date: Feb 2015
Posts: 15
Rep Power: 11 |
thanks for replying
i m actually doing heat transfer analysis with initial cond's: total temp: 425 C, total pressure: 17 bars outlet cond's: 14 bar ( static temp) |
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February 28, 2015, 07:45 |
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#5 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,862
Rep Power: 144 |
OK, if you are modelling heat transfer in the blade then model the blade as a solid body.
But the other two points still hold. |
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