Learning Forum

[PMwanza]

I've currently using ANSYS Academic version 2020 R1 . I have been trying to simulate a 3 blade VAWT  (Shown) in Fluent after creation of the geometry in space Claim but upon attempting to apply an enclosure before meshing I keep getting the following error.
 
" An error occurred while creating the enclosure - 2 bodies could not be subtracted from the enclosure body"
 

Kindly assist , what needs to be done.

[Rob]

Is the enclosure bigger than the blade? If a surface is touching are the two surfaces identical? For the latter it may be easier to extrude the blade slightly so it's sticking out of the enclosure. 

[PMwanza]

Yes the enclosure is 5 times bigger than the whole rotor comprising of the 3 blades and no surface surface is touching

[Keyur Kanade]

select bodies in structure tree --> right click --> select check geometry. 

your geometry must be error free before you use combine. 

Regards,

Keyur

 

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[PMwanza]

I have check the geometry and its coming out with no issue but upon using combine tool the error I am getting is as below;

Cannot merge bodies (operation failed because faces and edges would combine in a way that does not form a valid solid or surface)

[Rob]

In which case, are there any thin bodies in the cutting piece?

[PMwanza]

Yes there is

[PMwanza]

The problem is still unresolved. Any suggestions please

[Rob]

The first suggestion is not to post extra threads: they take time to clean up.

If there are thin bodies enclosure may struggle. Have a look at Fluent Meshing as I think you can put a shell around the object (same size & shape as your enclosure) and see how baffles are handled. 

[manelaero2020]

.

Hi

the problem is : Your surface is thin

solution :

1/ you can pull it ( pull function ) if your surface is not complicated

2/ you can use the stitch function

please look at the following video

3/ I don't know a lot about this function but you can try: facets then: thicken

Stitch function is enough to solve the problem

.