Mesh motion vs. Frame motion Small-Wind turbine

Rafael Radtke · November 8, 2018, 16:01

Hey guys,

I'm simulating a 3d small wind turbine (1,5m diameter) using two ways.

When I simulated the turbine in Steady state using Frame motion I got the result of 11 Nm for the turbine Torque

When I simulated the turbine in Transient state and using Mesh motion I got the result of 9 Nm for the turbine (after the simulation stabilize). Does anyone knows if this is a problem or it could really happen?

Thanks

Gert-Jan · November 14, 2018, 03:16

You need to compare with experiments.

Which software did you use? In CFX, I found differences, although mostly not this large. But it depends on the operation condition and the geometry. So impossible to say.......

November 8, 2018, 16:01	Mesh motion vs. Frame motion Small-Wind turbine	#1
Rafael Radtke New Member Rafael Radtke Join Date: Nov 2018 Posts: 1 Rep Power: 0	Hey guys, I'm simulating a 3d small wind turbine (1,5m diameter) using two ways. When I simulated the turbine in Steady state using Frame motion I got the result of 11 Nm for the turbine Torque When I simulated the turbine in Transient state and using Mesh motion I got the result of 9 Nm for the turbine (after the simulation stabilize). Does anyone knows if this is a problem or it could really happen? Thanks

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November 14, 2018, 03:16		#2
Gert-Jan Senior Member Gert-Jan Join Date: Oct 2012 Location: Europe Posts: 1,827 Rep Power: 27	You need to compare with experiments. Which software did you use? In CFX, I found differences, although mostly not this large. But it depends on the operation condition and the geometry. So impossible to say.......