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[Ak Muhammad Adam Pg Hj Ahmad]

Original post is here https://www.reddit.com/r/ANSYS/comments/zy3t2i/infinitely_increasing_power_coefficient_with/?utm_source=share&utm_medium=ios_app&utm_name=iossmf

Hello friends,

I am attempting to run a simulation using a whole rotor geometry and i was told to add inflation in my meshing for accuracy because my current mesh resulted in infinitely increasing torque on rotor blades with respect increasing angular velocity. 

 

However i am unable to employ inflation on my turbine properly, can i get a guide on how i can apply inflation on complex geometry such as a rotor, with turbine blade and hub connected

 

[Keyur Kanade]

Please check following videos

Ansys Meshing Sizing:
https://www.youtube.com/watch?v=w4q6q8nKF3U

Ansys Meshing: Inflation:
https://www.youtube.com/watch?v=lrEHXizrhC0

Please go through help manual for more details 

Regards,

Keyur

How to access Ansys Online Help Document

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[Nikhil N]

Hello, 

 

Can you post some images of your geometry and the existing mesh in the comments? 

 

I would recommend you to assign named selection to the rotor surfaces at the CAD level. With this, you can explicitly add boundary layers on the rotor surfaces (and not on hub).

Also, I would recommend you to use Ansys Fluent Meshing Watertight Workflow. 

Check out this free course on how to add boundary layers (inflation layers): Add Boundary Layers - ANSYS Innovation Courses

 

Thanks!

Nikhil

[Ak Muhammad Adam Pg Hj Ahmad]

Hello keyur and nikhil,

thanks for the video suggestion keyur 

 

and for nikhil, im tried to inflate this blade geometry but this is how it ended up im not sure, can you suggest where i should select for the boundary?

[Ak Muhammad Adam Pg Hj Ahmad]

Hello Ansys employee,

Any new advice, you can help me with?

[Ak Muhammad Adam Pg Hj Ahmad]

Do i need to apply sizing along the edges on the blade in order for this to work? i tried to follow the video but as u can see the blade geometry is not as simple as box and cylinder please advise me on this dear ansys employee keyur and nikhil

[Keyur Kanade]

Please use tetrahedron method. Then use inflation with aspect ratio method. 

Please go through help manual for more details 

Regards,

Keyur

How to access Ansys Online Help Document

Guidelines on the Student Community

 

[Green OKon]

Ansys reports that “Update Dynamic mesh failed” when I apply the inflation layer as you describe. What should I do about “negative cell volume detected” and other errors?

geometry dash

 

 

 

[Keyur Kanade]

This could be related to Fluent Solver. Request you to open a new post. 

Regards,

Keyur

How to access Ansys Online Help Document

Guidelines on the Student Community

Fluids Engineering Courses | Ansys Innovation Courses