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-   -   Calculation of Drag Force per unit Length (http://www.cfd-online.com/Forums/cfx/25010-calculation-drag-force-per-unit-length.html)

Mohammad Faridul Alam January 10, 2008 04:31

Calculation of Drag Force per unit Length
 
Hi,

I am running an unsteady simulation of flow past a 2D circular cylinder.

I wanna know the way to calculate Drag force per unit length (D/length) in CFX-post.

Thanks

Farid


CycLone January 10, 2008 11:29

Re: Calculation of Drag Force per unit Length
 
Calculate the drag. Divide by the length.

Mohammad Faridul Alam January 11, 2008 02:39

Re: Calculation of Drag Force per unit Length
 
Hi,

can you tell me for drag calculation which function I should use?

CycLone January 11, 2008 17:12

Re: Calculation of Drag Force per unit Length
 
Hi Mohammad,

You can use:

force_x()@boundary or force_y()@boundary or force_z()@boundary

You may need to do some trig to align it with your direction of motion if it isn't aligned with an axis. Replace "boundary" with the name of your boundary region or a surface group which includes all the relevant surfaces.

-CycLone


adel.rezvanivandefanayi January 11, 2013 08:19

terminal velocity
 
hi every body
can help me about calculate drag cofficient and terminal velocity in a cyclone in fluent
thank you


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