How to slice and structure turbine rotor's inner domain?

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  • Last Post 11 March 2020
Hazem posted this 10 March 2020

Dear members,

I have a 3 blade wind turbine rotor drawn here along with it's rotating domain and outer domain, I have sliced the outer domain and structured it such that on mesh it became a good hex mesh.
Now on solving this the Y+ for the blade walls was found too high and I need to decrease it. of course inflation isn't an option as it spoils the whole outer hex domain and worsens the quality insanely .

I'm looking to make the inner domain structured now(see the attached), any clue how to slice that so it has edges I can give bias to in meshing ?

(note that the turbine blades and the nose are no longer bodies as I subtracted them from the inner domain and chose not to preserve tool bodies as they're solids not flow)

 

Current inner domain mesh (Section view)

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rwoolhou posted this 10 March 2020

Have you looked at adaption on the hex mesh? Otherwise I'd just use tet or poly (for Fluent) mesh with inflation. 

Hazem posted this 10 March 2020

What's adaptation please? And no, I actually have to use hex mesh

kkanade posted this 11 March 2020

With blades, it is very very very difficult to get hex mesh in that domain. You may need to use ICEMCFD for that. So right now you will have to use inflation plus tet mesh. 

For adaption, please see following in help. 

2020 R1 > Fluent User's Guide > 48.2.55. Manage Adaption Registers Dialog Box

Fluent User's Guide Contents 48.2.55. Manage Adaption Registers Dialog Box The Manage Adaption

 

2020 R1 > Fluent Theory Guide > 29.1. Adaption Process

Fluent Theory Guide Contents 29.1. Adaption Process The adaption process is separated

 

2020 R1 > Fluent User's Guide > 38.5.1. Performing Geometry-Based Adaption

Fluent User's Guide Contents 38.5.1. Performing Geometry-Based Adaption The Geometry Based

 

Regards,

Keyur

 

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