wrong results in simulation

amwahba4 · August 8, 2020, 17:39

where the problem could be in such a case in simulation of vertical wind turbine
as the results are upnormal

bluebase · August 10, 2020, 17:45

Hi wahba,

abnormal is not a specific enough term to give concrete advice - other than asking you to put more thought in your question and post.
If you need advice, try to describe your problem in detail, what you have tried to solve it yourself, what you might not understand. This will increase your chance of receiving a voluntary advice.
Might these suggestion be helpful for you?

Best,
Sebastian

amwahba4 · August 10, 2020, 19:31

thanks sebastian for your interest,
i'm doing a simulation for on vertical wind turbine i got undesirable results such power coff is much higher normal ones in papers.
i noticed the velocity contour on low speeds such 40 rpm is logical but in high speed which i need to calculate at has the abnormal results as the high velocity occurs at the tip of rotating zone not the turbine tip as expected (the inserted pic)
i am using transiet flow with moving mesh and also the steady flow with MRF had the same high result.

August 8, 2020, 17:39	wrong results in simulation	#1
amwahba4 New Member wahba Join Date: Aug 2020 Posts: 4 Rep Power: 5	where the problem could be in such a case in simulation of vertical wind turbine as the results are upnormal

August 10, 2020, 17:45		#2
bluebase Senior Member Sebastian Engel Join Date: Jun 2011 Location: Germany Posts: 566 Rep Power: 20	Hi wahba, abnormal is not a specific enough term to give concrete advice - other than asking you to put more thought in your question and post. If you need advice, try to describe your problem in detail, what you have tried to solve it yourself, what you might not understand. This will increase your chance of receiving a voluntary advice. Might these suggestion be helpful for you? Best, Sebastian amwahba4 likes this.

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August 10, 2020, 19:31		#3
amwahba4 New Member wahba Join Date: Aug 2020 Posts: 4 Rep Power: 5	thanks sebastian for your interest, i'm doing a simulation for on vertical wind turbine i got undesirable results such power coff is much higher normal ones in papers. i noticed the velocity contour on low speeds such 40 rpm is logical but in high speed which i need to calculate at has the abnormal results as the high velocity occurs at the tip of rotating zone not the turbine tip as expected (the inserted pic) i am using transiet flow with moving mesh and also the steady flow with MRF had the same high result.