Propeller Fluid Analysis

[HHOA1307]

Hello all,

I'm trying to simulate a propeller, turning at 1000 RPM, to calculate the thrust it creates and/or the volume of air it passes through per minute.

My part is only the propeller with no shaft, pin, no static parts, etc. As you can see in the below screen shot, I've defined the Ext. Volume as air and the propeller as solid ABS. I've also defined the "rotor" as Rotatinal Region but I can't assign it.

I went through the "Centrifugal Pumps and Axial Fans" tutorial; but, I apparently miss some points. If I try to assign it to the Ext. Volume, then I get the error: "No neighboring fluids found". If I assign it to the part (instead of solid ABS) then the simulation don't produce results...

Attached is the simulation files.

I'd very much appreciate your help!

Best regards,

Kaan

[Jon.Wilde · Accepted solution]

You need a Rotating Region, which will be a solid cylinder in CAD encompassing the impeller. Ths is the part that you rotate within CFD. It should sit a little outside of the impeller so that the edges are not coindicent.

Might you also consider running this within a cylindrical tube? Then you could accurately measure how much flow moves through your design

[HHOA1307]

Thanks Jon!

Propeller will be running freely, but I assume you suggest running it in a cylindrical tube for the sake of simulation results?

I will try both ways and let you know of the results...

Best,
Kaan

[h.m.tran]

hi Jonh, 

Would you please help me with this issue,

I am trying to assign internal fan material devices to the diffusers in my room, but the problem is the software warning " setting can not be applied to Volume 30 :

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@Jon.Wilde wrote:

You need a Rotating Region, which will be a solid cylinder in CAD encompassing the impeller. Ths is the part that you rotate within CFD. It should sit a little outside of the impeller so that the edges are not coindicent.

Might you also consider running this within a cylindrical tube? Then you could accurately measure how much flow moves through your design

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d" like the pic below. Are they need air material surround? and How to create "air volume" ?

Internal Fan Material Devices

[Jon.Wilde]

Hi @h.m.tran

Might you start a new thread for this please? Pretty sure this entirely unrelated to the other issue regarding rotating regions 🙂

Short answer though - you need a sealed assembly and CFD will auto create the internal volume. 

[h.m.tran]

Hi John,
I have created new thread for my problems, please help with this
https://forums.autodesk.com/t5/cfd-forum/internal-fan-material-devices-no-neighboring-fruid-found/td...
Thank you so much