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-   -   VAWT simulation (http://www.cfd-online.com/Forums/flow-3d/79115-vawt-simulation.html)

kaje August 12, 2010 23:44

VAWT simulation
 
Hi all,

I'm just new with Flow 3D software.

I want to know the following

How can we simulate a Vertical Axis Wind Turbine in open air? for example we have a 7 m/s wind speed, Can we compute the rotation of the Blade of the Rotor? and also the Torque?

What is the proper set-up of its Mesh Geometry, Boundary Condition, Initial, Physic and all other paramters?

Thanks in advance for you help

MuxaB August 27, 2010 00:14

i think this is doable, but may be a time-consuming simulation, especially if the turbine blades are thin compared to its span. I would define a mesh box around it, mesh it so that the geometry is well resolved and define a wind velocity at one boundary and pressure at all others. Turbulence will be important, gravity - not so much.

The turbine itself shall be modeled as a fixed-axis GMO component.

kaje September 13, 2010 01:16

thanks for your reply, michael..

but i having a problem right now.. for there is still no movement on the blades..

MuxaB September 14, 2010 23:00

Quote:

Originally Posted by kaje (Post 274926)
thanks for your reply, michael..

but i having a problem right now.. for there is still no movement on the blades..

Are the blades represented by a prescribed-motion or coupled-motion GMO component? I presume it should be prescribed-motion, in which case it should be a fixed-axis rotation component with a predefined angular velocity, right?

There is an Example problem called GMO mixers in $F3D_HOME folder that has a simple but similar setup for two rotating GMO components.


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