# analysis 3D fan

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 December 12, 2009, 03:33 analysis 3D fan #1 New Member   Vahid Memar Join Date: Dec 2009 Posts: 15 Rep Power: 7 Hi all I want to analysis 3D modeling of fan and measure axial force on blade, Moment on blade and flow that it can produce. I create 3D modeling and mesh them, but I can not know what must do I do for definition then boundary condition specially for boundary condition for Blade(define as wall), Moving wall or stationary wall ? and what is the sign of angular velocity ? Best Regards

December 31, 2009, 20:39
#2
Senior Member

michael barkhudarov
Join Date: Mar 2009
Posts: 331
Rep Power: 9
Quote:
 Originally Posted by v_h_memar Hi all I want to analysis 3D modeling of fan and measure axial force on blade, Moment on blade and flow that it can produce. I create 3D modeling and mesh them, but I can not know what must do I do for definition then boundary condition specially for boundary condition for Blade(define as wall), Moving wall or stationary wall ? and what is the sign of angular velocity ?
The blade will have to be defined as a moving component. With a prescribed velocity OR torque. The positive direction of both torque and velocity are defined in the conventional way. You can quickly see which way the blade will rotate once you start the simulation.

The mesh boundary conditions can of fixed pressure, with the pressure equal to the ambient. What kind of blade is it?

 February 4, 2010, 09:43 #3 New Member   Join Date: Mar 2009 Location: green earth, blue ocean Posts: 29 Rep Power: 8 hi, U should define fan as GMO model, at example in flow3d are available good luck!

 February 5, 2010, 00:03 #4 Senior Member   Join Date: Mar 2009 Posts: 129 Rep Power: 8 Hi Fathan can you send me the link that shown the 3D fan example by Flow-3D? Thanks.

 February 5, 2010, 21:26 #5 New Member   Join Date: Mar 2009 Location: green earth, blue ocean Posts: 29 Rep Power: 8 x:\flow3d\v9.3\examples\gmo_mixers u can find sample at your computer directories above

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