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-   -   how to give swirl flow in 3D cylinder by using fluent 6.3 (http://www.cfd-online.com/Forums/fluent/102809-how-give-swirl-flow-3d-cylinder-using-fluent-6-3-a.html)

shivampm June 3, 2012 07:12

how to give swirl flow in 3D cylinder by using fluent 6.3
 
hi
i am trying to give swirl flow of different swirl no. like 0.4,0.8,1.4,2.7 etc using fluent 6.3. In 3d cylinder body how can i give swirl flow. suggest me procedure please....
thanks in advance

LuckyTran June 3, 2012 13:13

Quote:

Originally Posted by shivampm (Post 364492)
hi
i am trying to give swirl flow of different swirl no. like 0.4,0.8,1.4,2.7 etc using fluent 6.3. In 3d cylinder body how can i give swirl flow. suggest me procedure please....
thanks in advance

what is the flow domain? your description is inadequate.

you can specify any number of velocities, wall shear stresses, or applying moving walls to get swirl flows. it is rather straight forward. there is nothing special about swirl, it is just velocity in a different direction and you just proceed with that in mind. If you are trying to apply swirl to a plane inlet velocity, then it is a little more difficult.

shivampm June 3, 2012 15:09

1 Attachment(s)
Quote:

Originally Posted by LuckyTran (Post 364518)
what is the flow domain? your description is inadequate.

you can specify any number of velocities, wall shear stresses, or applying moving walls to get swirl flows. it is rather straight forward. there is nothing special about swirl, it is just velocity in a different direction and you just proceed with that in mind. If you are trying to apply swirl to a plane inlet velocity, then it is a little more difficult.

thank you for your suggestion.Flow domain is as mention in the diagram ( fig 1).
I want to give swirl velocity with axial velocity from inlet face as shown in diagram...
wts procedure for it???????

LuckyTran June 3, 2012 19:54

You can apply "swirl" through the velocity inlet boundary condition settings

Choose components as your velocity specification method, and use a local cylindrical coordinate system

specify your cylindrical coordinate system and then specify the angular velocity to get the swirl number you are looking for. Obviously this method only works for constant swirl. If you want varying swirl number you need to do more work.


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