wind rotor problem in Fluent

dark0807 · January 2, 2011, 09:30

I'm doing simulations of rotating Savonius wind rotor in transient problem

I do that using k-e model, moving mesh and caculate cp by the average torque value of a round rotating

but the cp are always lower than experiment values from a reference paper

it's no use by increasing the domain or higher the number of grids

how to setting the scheme in this problem or what can I do for this?

thanks

Rich1979 · January 10, 2011, 09:42

Hi,
first of all are you making 2d or 3d simulations?
How have you choosen the turbulence modeling?Intensity and lenght scale?
Is your timestep ok?
I am asking this because all of these factors influences the result of your simulation.
If you haven't done,give a look at this thread : http://www.cfd-online.com/Forums/flu...light=savonius , it gave me a lot of answers.
Hope to be helpful.

January 2, 2011, 09:30	wind rotor problem in Fluent	#1
dark0807 New Member Johnson Join Date: Oct 2010 Posts: 5 Rep Power: 15	I'm doing simulations of rotating Savonius wind rotor in transient problem I do that using k-e model, moving mesh and caculate cp by the average torque value of a round rotating but the cp are always lower than experiment values from a reference paper it's no use by increasing the domain or higher the number of grids how to setting the scheme in this problem or what can I do for this? thanks

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January 10, 2011, 09:42		#2
Rich1979 Member Join Date: Dec 2009 Posts: 41 Rep Power: 16	Hi, first of all are you making 2d or 3d simulations? How have you choosen the turbulence modeling?Intensity and lenght scale? Is your timestep ok? I am asking this because all of these factors influences the result of your simulation. If you haven't done,give a look at this thread : http://www.cfd-online.com/Forums/flu...light=savonius , it gave me a lot of answers. Hope to be helpful.