5 Replies Latest reply on Jun 15, 2015 12:03 PM by Tom Mallard

# Separating mixed fluids (oil and water) with rotational (centrifugal) force

Hi there,

I'm trying to simulate a continuous stream centrifugal separator. Basically, I want to have one inlet tube with some concentration of oil and water, and two outlet surfaces for just oil and just water. In order to achieve this separation, the entire system will be rotating at an RPM that allows for this quick separation.

Is this possible? I've been trying to achieve this with no luck. I can't get the fluids to separate; the concentration just stays the same the whole time. I can provide my SW files or images if it makes it easier to understand my question.

Thanks

• ###### Re: Separating mixed fluids (oil and water) with rotational (centrifugal) force

try to use particle studies but default fluid should be oil in this case...

good luck

• ###### Re: Separating mixed fluids (oil and water) with rotational (centrifugal) force

Hmm, I'll try that. Thanks!

• ###### Re: Separating mixed fluids (oil and water) with rotational (centrifugal) force

Reactions w/o knowing more, it'll be temp dependent for velocity so optimizing density diff with that in mind.

A bigger deal perhaps, won't a whirlpool do the job w/o the centrifuge ... shooting the flow into a special funnel, aka toilet bowl, with ribs for harvesting the denser fluid? ... just a low-power thought.

• ###### Re: Separating mixed fluids (oil and water) with rotational (centrifugal) force

So I should definitely tick the "time dependent" box, right?

Honestly I'm pretty lost. I've set an input volume flow with .9 water and .1 [other fluid] volume fractions in one pipe. And the other two surfaces I've set atmospheric pressure. And the entire thing is rotating. But that isn't producing the desired effect. There is some volume fraction change but it's not very significant considering I want a complete separation.

• ###### Re: Separating mixed fluids (oil and water) with rotational (centrifugal) force

If' they're well mixed, oil-water separation is standard water treatment so plenty of units to fit needs & suggest you find one that's similar to design from, this website has things to look at: www.wwdmag.com;  www.processingmagazine.com for pumps & hoppers.

Separators are part of water processing, the problem is similar to harvesting biodiesel yet wastewater has OTS components for oil-water, chemicals & all.