UDF for Transient analysis of a VAWT

fkanyako · February 9, 2013, 06:41

Hi All,
I' working on vertical axis wind turbine;Using the sliding method. am trying to write a UDF in order to :
1. get the time average torque, that FLUENT can't give you.
2. get the angle of attack as a function of blade azimuthal position and time for every 4 degree of rotation. I greatly appreciate your contribution

Can everybody help me?
Thanks.

CFDiran · February 10, 2013, 06:20

Hi fkanyako
I had this problem before,
you should write UDF for saving the Forces acting on every blade (in text file) in each Time Step.
you can use the Compute_Force_And_Moment macro for calculating the Force and Moment in every time step.

fkanyako · March 12, 2013, 03:54

Quote:

Originally Posted by CFDiran

Hi fkanyako
I had this problem before,
you should write UDF for saving the Forces acting on every blade (in text file) in each Time Step.
you can use the Compute_Force_And_Moment macro for calculating the Force and Moment in every time step.

Thank you very much CFDiran, I have just started learning UDF, I will get back to you if I need any help. Please my email is pujehun@live.com, you can send me a message if you don't want your email public. I really need your guidance.

billwangard · March 12, 2013, 13:24

I have a UDF which computes the forces and moments and can dump the output to a file.

fkanyako · March 12, 2013, 15:25

Quote:

Originally Posted by billwangard

I have a UDF which computes the forces and moments and can dump the output to a file.

Thanks Bill
Do you mind posting it or email me at pujehun@live.com

samcfd · April 19, 2013, 01:21

Quote:

Originally Posted by fkanyako

Thanks Bill
Do you mind posting it or email me at pujehun@live.com

Hi need a UDF for the same. Can u share it with me pls...

Thanks
sam.

fkanyako · October 1, 2013, 07:30

Quote:

Originally Posted by samcfd

Hi need a UDF for the same. Can u share it with me pls...

Thanks
sam.

I never got the UDF file.

armanpournasiri · February 9, 2016, 18:46

Hi all
I' working on vertical axis wind turbine;Using MRF method.Is to calculate the torque required to write udf in fluent?
if you have this UDF send me please.
thank you.

February 9, 2013, 06:41	UDF for Transient analysis of a VAWT	#1
fkanyako New Member Musa Join Date: Mar 2012 Posts: 14 Rep Power: 14	Hi All, I' working on vertical axis wind turbine;Using the sliding method. am trying to write a UDF in order to : 1. get the time average torque, that FLUENT can't give you. 2. get the angle of attack as a function of blade azimuthal position and time for every 4 degree of rotation. I greatly appreciate your contribution Can everybody help me? Thanks.

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February 10, 2013, 06:20		#2
CFDiran New Member Join Date: Feb 2013 Posts: 5 Rep Power: 13	Hi fkanyako I had this problem before, you should write UDF for saving the Forces acting on every blade (in text file) in each Time Step. you can use the Compute_Force_And_Moment macro for calculating the Force and Moment in every time step.

March 12, 2013, 13:24		#4
billwangard New Member Bill Wangard Join Date: Jan 2011 Posts: 21 Rep Power: 0	I have a UDF which computes the forces and moments and can dump the output to a file.

February 9, 2016, 18:46		#8
armanpournasiri New Member arman Join Date: Feb 2016 Posts: 11 Rep Power: 10	Hi all I' working on vertical axis wind turbine;Using MRF method.Is to calculate the torque required to write udf in fluent? if you have this UDF send me please. thank you.