[thefinalyearkid]

Hello! So im currently working on a project that requires me to analyze the flow around a vehicle in this case - a renault clio

So i obtained this model and saved it as a parasoild and then imported it into ANSYS, then, i generated a enclosure to depict air as usual and went about creating a boolean to substract the vehicle from the air(enclosure)

This is where the error of 'non-manifold' bodies occurs, i have read some other posts on some inability to substract surfaces and im not too sure on how to go about resolving this issure!

Please help!

[Sixkillers]

Before subtract operation I would definitely unite the hole car into a one body.

[diamondx]

Yes the problem is the surface/solid operation.
Designmodeler cannot perform an operation between solid and surface.
when you import the car, you have to fill the inside with a some solid. There is a feature called FILL in designmodeler that let's you do that.
After the fill is done, delete those surfaces as you don't need them, you can do that with body operation then delete.
Then make that rectangle and perform the Boolean feature.

A more easy way is to import your car as a solid and not as a surface, i guess this is done when exporting you car in the CAD software in which you made the car ? try an extension like IGES , or STEP...

[diamondx]

also see this Bug in DM

[thefinalyearkid]

Ah yes! Brilliant, so the open surfaces is what causes the problem in DM,

anyhow guys i was doing some research and found this software called blender, and the link shows some amazing features that actually tell you the location of non-manifold body errors and allows for you to very simply cover up the open surfaces


the youtube link is :
http://www.youtube.com/watch?v=H6NXhfw9itI

and the website link is :
http://www.blender.org/download/get-blender/

[oewnce932c]

Hi thefinalyearkid.
i got the same problem. i imported ship hull from IGES(500+ surfaces), just half hull without deck. i wanted to creat a body from it. Done 2 surfaces: deck and mid-ship.
after that tryed with Body Operation: Sew this three objects: 2 created surfaces and surface-body(IGES(500+ surfaces))
with default tolerance was warning and errors:
"Warning: Sewing operation partial failure possibly due to incompatible attributes"
"Warning: not all bodies can be sewn or converted to solid body"
and by boolean: subtract
"Error: Operation would result in non-manifold bodies"

solution was to reduce the tolerance from default value(0.0015m) to 0.015m. after that it works fine!