[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 ?

Best Regards

[MuxaB]

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?

[hans_ina]

hi, U should define fan as GMO model, at example in flow3d are available
good luck!

[ck5285]

Hi Fathan
can you send me the link that shown the 3D fan example by Flow-3D? Thanks.

[hans_ina]

x:\flow3d\v9.3\examples\gmo_mixers

u can find sample at your computer directories above