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December 12, 2012, 17:36 |
rotation
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#1 |
New Member
kris pani
Join Date: Mar 2012
Location: Greece
Posts: 14
Rep Power: 14 |
Hello,
I want your advice.. I am trying to simulate heat transfer in a natural convection problem. My cylinder can is on a rotating disc.. I don't get the results I want, so I am asking you: Do I have to use the Frame Motion option from Cell Zone Conditions in order to put the rotation speed and the Rotation-axis direction or I have to use the option Moving wall fron Boundary Conditions. Maybe both of them? Thank you.. K.P |
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December 13, 2012, 10:50 |
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#2 |
Senior Member
Rick
Join Date: Oct 2010
Posts: 1,016
Rep Power: 27 |
you can use moving wall only if you have a surface of revolution (a cylinder is a surface of revolution); you can't use moving wall for the other cases (ex: rushton impeller, which is not a surface of revolution).
Daniele |
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December 13, 2012, 12:14 |
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#3 |
New Member
kris pani
Join Date: Mar 2012
Location: Greece
Posts: 14
Rep Power: 14 |
Thank you Daniele !
K.P |
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December 14, 2012, 08:05 |
rotation
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#4 |
New Member
ali m
Join Date: Oct 2012
Posts: 8
Rep Power: 14 |
I am modeling an air turbine in millimeter dimension. and have a problem with these rotation setting!
what should i do? should i set a rotation velocity in cell zone condition for that region(the zone that is rotating)?or in wall rotation in boundary condition? or both of them? please answer me!! Thank u |
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December 14, 2012, 08:18 |
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#5 |
Senior Member
Rick
Join Date: Oct 2010
Posts: 1,016
Rep Power: 27 |
Set an absolute rotational velocity to cell zone adiacent to your rotating turbine, then set the walls inside this cell zone to rotate with 0 relative velocity.
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December 15, 2012, 03:34 |
hey
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#6 |
New Member
ali m
Join Date: Oct 2012
Posts: 8
Rep Power: 14 |
yeah
i think you are true but, how do i know (for design), how much of the cell zone, should be in rotating zone?maybe just near the turbine?or a bit far or ...? how much? tanx |
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December 15, 2012, 10:29 |
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#7 | |
Senior Member
Rick
Join Date: Oct 2010
Posts: 1,016
Rep Power: 27 |
Quote:
Daniele |
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Tags |
natural convection, rotation |
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