Virtual Blade Model (VBM) for wind turbine.
 

Hi everybody,

I had a question about doing a simulation with help of VBM on a 2-bladed
horizontal axis turbine.

The mesh that I am working is a horizontal axis turbine in compare with the
tutorial example, that I had from FLUENT company, in which it
has a vertical axis rotor of a helicopter in its mesh.

My problem is at the very last step of defining the case in FLUENT. When I
put all my information in the "Rotor Inputs" panel, after clicking on
change/creat to save the changes, by clicking on OK button I will get the
fallowing error:

================================================== ===================
1000000 ERROR: Cell ID not determined 1000000 allocate_memory
/usr/local/Fluent.Inc/fluent6.3.26/Inamd64/3d/fluent.6.3.26[0xdd6fcb]
/usr/local/Fluent.Inc/fluent6.3.26/Inamd64/3d/fluent.6.3.26[0xdd6f21]
/lib64/libpthread.so.0[0x3de400e4c0]
libudf/inam64/3d/libudf.so(allocate_memory+0x6a9)[0x2ad5ac63ef5b]

Error: fluent.6.3.26 received a fatal signal (SEGMENTATION VIOLATION) Error
Object: #f
================================================== ===================

I am pretty sure that my settings have no problem, as long as I am able to
run the simulation for the tutorial example. My idea is that I am doing
something wrong, or should have something in my mesh. Because based on the above error, FLUENT can not recognize my rotor zone.


Thank you for your time and consideration and I am looking forward for your helps and answers.

With regards

Teymour Javaherchi

hellou, please you know where i can found a tutorial to to my blade design model in asys fluent?, i dontknow how to start,thanks

Hey,

The tutorial is not available on the web. We got it from FLUENT. You should contact them directly and request for the tutorials and the UDF's for the VBM (Note that the files are big and can't be sent via Email and you will receive it on a CD from FLUENT).

Provide me an Email address and I can send you the tutorial PDF, so that in mean while you can read about it.

I hope that this was helpful.

Good luck with you design! ;)

Hi Teymour

I need to the udfs and tutorial about the VBM model too and don't know how can access to it.

Would you please send me udfs and some tutorial about it? (Email adrress: ghazanfar.zahedi@gmail.com )

Specially thanks in advance for your favor
Ghazanfar Zahedi

Hi Teymour,
Is it possible to send me the tutorials too? I am new to Fluent. My email address is: kanyabm@clarkson.edu
Thanks.

Thesis help!
 

Hello!Is it possible to email me the tutorial and if possible the udf?I need them for my thesis!My email is: antoniskirkos@hotmail.com Thank you for your time!

Best regards!

can you send that tutorial to me at kirit.morshed@yahoo.com

kirit

Dear all,

After posting this post I received lot of CMs about sending the tutorials and files for VBM, but unfortunately I won't be able to do this for every single of you and I gave it up after sending it to very two requests. I advised you guys to contact FLUENT under aca-support@fluent.com and request the tutorials and related files from them. It is part of their customer service and support to respond you and send the required files to you. Please don't send me your Email to get those files.

I wish all of you best of luck with your projects and research.

With regards

-teymourj

hi every body, I am working on wind turbine blade on ansys, so could you please send me the pdf tutorial by mail (ali_jamaleldeen@hotmail.com)

Hi All,

I am working on wind turbine blade Fluent Ver. 6.3. I am really interesting Fluent Virtual Blade Model method to do it. Could you please send me the UDFs and pdf tutorial by email: trantoan2008@gmail.com

Thanks in advanced

Hey,

VBM UDF can be provided via the company that provides you FLUENT licences. Simply ask them and tell them the version of FLUENT that you are working with and they will send everything for you.

Best,

Teymour

Hi Teymour

Thank you for your response. Unfortunately, I am not Fluent's customer so that they provide that for me. If possible, Could you help me?

Best,
Tran

Hi Teymourj

I need to the udfs and tutorial about the VBM model too and don't know how can access to it.

Would you please send me udfs and some tutorial about it? (Email adrress: blgylovepeng@gmail.com )

Specially thanks in advance for your favor
yan liu

All of our developed VBM simulation are belong to you ;)
 

All of our previously developed RANS simulations (including VBM) are now publicly available here:

https://mhkdr.openei.org/submissions/all

Take advantage of them and cite us ;)

Hi Teymourj,this web about the vbm,all informance include cas and data file, is not yet available for download.

The data has been submitted few days ago. Allow some time for being process and checked. It should be available for public access soon :cool:.

I can not provide you the UDFs and case studies directly. Sorry about that! :D

hi teymourj, encountered the same problem with you,I want to know how you can solve this problem? I guess it should be a grid problem.
I tried out the grid many times and not succeeded.The grid needs to meet some certain conditions,maybe,but i don't know.
can you give me some hint?
error:
1000000 sum_icell_f = 6658, sum_icell_c0 = 610635, sum_icell_c1 = 20050
1000000 ERROR: Cell ID not determined
1000000 allocate_memory

Error: received a fatal signal (Segmentation fault).

Error: received a fatal signal (Segmentation fault).
Error Object: #f

thanks.

Reply-blgypeng
 

blgypeng,

It's been a while since I have resolved this error. Here is some tips for you:

1-Make sure in your mesh you have an full 360 unit circular face as the rot_face.

2-When meshing it make sure to mesh it separately and standalone as a face and mesh the rest of the volume based on that.

3-When entering the information on the VBM panel make sure to use very accurate data for sizes and position of the origin (i.e. take them from your mesher).

4-Eneter the blade section information one-by-one and hit change/create bottom and OK every time.

These should minimize your issues with VBM. Most of the time setting up the VBM model for the first time comes with many crashes and mistakes. It happens to everyone.

Good luck!

teymourj,
thank you for your quick response.I tried to do what you said,and made a test used a structure grid and succeeded.Prior to this, I used unstructured meshes，and the thickness of rotor fluid cell zone is not a layer,i guess this is a reasion the mesh not work. Anyway,i will try to use the structural grid to complete the windfarm simulation. Thank you very much.
And now,i have a another problem,about the VBM model parallel computing.Do not know if you have used parallel.I just want to know the VBM model UDF can be compiled in parallel?
Thank you very much.Best.

Reply2-blgypeng
 

Dear all,

Due to a high volume of contact about VBM and it's implementation for simulation of horizontal axis wind and tidal turbines and after some in-depth investigation I have found the proper sharing route of our methodology development and VBM UDF files.

Users can find the step-by-step methodological tutorial for implementation of VBM to model a horizontal axis wind turbine here:

http://nbviewer.jupyter.org/github/s...t/README.ipynb

As mentioned in one section of the tutorials all the required VBM UDF files compatible on version 14.0 and above can be downloaded from our github page at:
https://github.com/sfo-project/3D-fl...t/README.ipynb

Please feel free to check out our other tutorials for fundamental (Tier I) and complex (Tier II) implemented in Star CCM+, FLUENT and Open-foam (SFO-project) here at the SFO-project page:

http://faculty.washington.edu/teymourj/sfo-project.html

If you had a case study that wanted to add to our archive, we will be more than happy to help you do that under your name. The SFO-project team will help you and teach you how to do this process.

Let me know if you needed any more information on VBM.

teymourj,thank you very very much. Thank you for your paper.And i have your one paper in 2012 year,"Numerical analysis of Tidal Turbines using VBM Model and Single Rotating Reference Frame".I will study it in detial.

Best.Thanks again for your help.

what is trimming
 

Dear Teymour,

Thank you very much for your kind help with regard to virtual blade model in ansys.

I wanted to ask you what exactly is the function of "trimming" in the rotor panel that one can find after compiling and building the udf?

Thank you for your reply in advance.

Response
 

To best of my knowledge that is an option for simulation of helicopter or other blades that are not stiff and has more complex motion along the blade span.

For stiff blades we just simply did not use it.

For more details I would refer you to the original help manual of VBM on simulation of helicopter blades.

Hope this helps.

Thank you for your kind response.

May I know what exactly is this 'original help manual'?

Is this the note book on git hub you have posted?

Email me.
 

Email me and I will send it to you.

Please send me tutorial
 

Hello,

I don't know if it's too late but I'm just getting started on VBM for my final project. Would you mind sending me the tutorial please... My email is thinh@neuralmetrics.net.

Many thanks.

Link to tutorial and files for VBM.
 

Please check the following link and Email SFO team with any questions:

http://nbviewer.jupyter.org/github/s...t/README.ipynb

Require help for helicopter simulation
 

Hi, would like to enquire if it is possible for this original help manual to be sent to me as well!
May I get your email if it is possible?

Thanks in advance!
Greg