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Re: Fluid Analysis without inlet/outlet, using CFD
Danny -
what would you be trying to simulate? the mixing of multiple liquids?
SW Flow can't do interaction of liquids and gases if you want to simulate entraining air.
I've got some downtime this afternoon so I'll setup something quick and easy and see if it complains.
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Re: Fluid Analysis without inlet/outlet, using CFD
Chris-
Thank you for your response. I essentially have a tank like this one, it will have product in it, and the center shaft rotates, causing all those blades to mix the product. The ends won't have holes and there will be a lid (everything isn't in the picture). I just need to see the flow pattern of the product inside the tank. Mixing of multiple liquids would be nice, but not completely necessary. It would just be good to see how the product is going to move around in the tank.
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Re: Fluid Analysis without inlet/outlet, using CFD
if the tank is not completely full it won't work (or at least if the blades aren't completely submerged. Because SW Flow resolve which cells are liquid, which are gas, which are solid only once, it won't simulate the upper surface moving.
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Re: Fluid Analysis without inlet/outlet, using CFD
Hmm, the tank will never be completely full, nor the blades completely submerged. I guess it still could give an "idea" of what would happen , but probably not worth the purchase. I wonder if there's something I could buy (like a small ball or something), that I could drop in the tank with the product, turn the blender on, and have it track and record its path as it travels around in the blender (kind of like a tracking beacon).
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Re: Fluid Analysis without inlet/outlet, using CFD
Sorry I am coming later to this message.
You may want to contact your VAR and ask them about it. When we were considering Flow Simulation we actually made up a sample model and supplied it to our VAR to have them setup and demostrate what it could do for us. This is a high ticket price item. They may be able to do a lot for you in order to get a sale.
Regards,
Ron
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Re: Fluid Analysis without inlet/outlet, using CFD
The limitations in flow are no free surface and it uses the rotating frame approximation for rotating objects. The rotating frame approximation is only supported in the steady state analysis option. The rotating frame approxiamtion smears out the response azimuthally so details of the rotor stator interaction are not resolved. What is resolved is the overall flow characteristics. The lack of support for a free surface means that one has to totally enclose the flow volume. In this case it would mean putting a "lid" to replace the free surface. If the rotor pentrates the free surface the analysis maybe problematic. If it does not, ie the fluid volume submerges the rotor, thena lid can be placed to replace the free surface and given a frcitionless or ideal wall condition. A small opening maybe required to get a solution to run which would have an ambient pressure BC and located on the free surface lid BC. The amount of inflow or out flow can be resovled at thes BC which should be small as in inconsequential. The flow pattern will then be resolved to a likely decent approximation of what is actually occuring and should provide insight into what you are seeking.
