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Modelling an Actuator Disk in FLUENT

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Old   July 12, 2015, 16:07
Default Modelling an Actuator Disk in FLUENT
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I'm having an awful lot of trouble with this, and I'm hoping I can get some help. I'm trying to model an actuator disk in Fluent, so I can eventually model the effect of a duct on a propellor.


My geometry looks something like this, http://i.imgur.com/bAHunTI.png with the small cylinder in the middle being where my actuator disk is meant to be. Unfortunately my results look like this: http://i.imgur.com/ZxjVH0A.png


I've tried every combination of boundary conditions going in and out of the smaller cylinder that I can think of, and this is all I'm getting. The only flow my boundary conditions create is inside the disk, not in the larger domain. I've made the smaller cylinder a solid, a fluid, even tried making it a fan, and it's always the same result.


Is there a simple way to model an actuator disk in Fluent? Better still is there a wall to create just a... I guess a face, to serve as a discontinuity in FLUENT that I could use to model the effect of a propellor?
Any assistance would be Very much appreciated.
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Old   July 19, 2015, 18:10
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Hi.. if you haven't yet found a solution, consider subtracting the disc from the flow domain in your model.. assign inlet and outlet boundary condition on the faces of the larger domain (assuming you intend to simulate the flow around the smaller disc).. assign simple wall boundary condition to the circumference and upstream & downstream disc faces.

if you could post any development, it would help being more specific in order to support further.

Cheers.
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