Flow Simulation in SW (inlet-outlet) 1

[cardiomed]

The object(a chamber with a filter inside) is ready for the flow simulation, you should close the inlet and outlet as SW prompts you by putting "lids" to get the simulation run, I did so but it keeps giving the error saying: "The selected face dose not contact fluid or it is an external face of the model"

I changed the lids few times but still doesn't proceed the flow running to the chamber,

Any idea??
Thanks alot

 

[MikeHalloran]

Choose a different face?


Mike Halloran
Pembroke Pines, FL, USA

 

[MikeHalloran]

By which I mean,

try choosing, e.g. the edge at the intersection of a port face and the port bore when constructing a lid.

( I don't have access to SW right now, but I remember having the exact same problem as you when I tried flow simulation. )

Mike Halloran
Pembroke Pines, FL, USA

 

[cardiomed]

Well, I dont wanna change my inlet-outlet ports,

 

[cardiomed]

FYI, I swapped the inlet and outlet ports, now inlet is accepted but not the outlet(or the real inlet),

I'll have to play around with the geometry I guess,

 

[SteveMartin]

Is your filter defined as porous? If not, and assuming the filter body is fully seated all around (fluid can't go around it) your inlet & outlet ports will be blocked by the (solid) filter body, and the outlet won't be connected to the fluid flowing in the inlet.

Another possibility: make sure you're selecting the face of the lid that is internal to the assembly. Your fluid doesn't flow through the lid, it starts at it and flows away from (or into) whichever face you selected.

 

[MikeHalloran]

Yeah, that's the trick I couldn't remember; you have to select the inner face of the lid.



Mike Halloran
Pembroke Pines, FL, USA

 

[kellnerp]

Use TOOLS/CHECK and look for short edges, cracks, etc.

Extract the inside faces and see if you can knit them into a solid. If you can't there is a geometry problem.

Slice the model in half by extruding a block across either half. If one half runs and the other doesn't the problem is in the other half.

Model quality is very important in FEA and FDA. Meshes don't like sliver faces, small gaps and edge that are disproportionately short.

TOP
CSWP, BSSE

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[cardiomed]

Thanks every one, ..as StiveMartin said I had a hard time defining the 'filter' in my object. I created a solid cylinder with pleats all around (which looks like a real filter) and then using the APPEARANCE feature I picked mesh (which looks like inserts holes all around the surface, my filter is supposed to be 40 microns but could not create that anyways).

If any one has any idea about creating a 'filter' element that would be great.

I select the inner surface of the lid inside the tube/port for my inlet, that cannot be the problem.

Thanks again,

 

[SteveMartin]

Search the help for 'porous media'. In Floworks2008 the command chain is FloWorks>Insert>Porous Medium.

I can't really help you define the medium for your filter, even if I had more information about it, as I'm not really familiar with this tool. Hopefully this much gives you a useful starting point.

 

[cardiomed]

you wanna have a look on the model? I am uploading the file, the object is supposed to be a filter element with approx 40 micron holes,

Thanks

 

[SteveMartin]

No can do - I think I saw in another post that you're running SW2010. I'm still stuck on 2008 around here. In any event, I get the ever-charming 'future version' error when I try to open yours.

 

[kellnerp]

Save to parasolid a few versions prior. Then everybody can see. Or PDF.

TOP
CSWP, BSSE

http://www.engtran.com

http://www.niswug.org

"Node news is good news."