Modelling Vapour Pressure in CFX

Bioinst · November 9, 2010, 20:27

I'm wishing to model a system, part of which involves measuring the change in the vapour pressure of water due to a heat impulse.

I believed I could do this in CFX after seeing some promotional material stating that it had models for evaporation and condensation. However, I'm new to CFX and am having trouble understanding how to implement this. I've worked through some of the tutorials provided with CFX but none of them seem to cover evaporation. Does anyone have a tutorial or advice as to how I'd go about implementing condensation or evaporation?

ghorrocks · November 10, 2010, 16:37

I don't think any tutorial examples cover evaporation. Talk to CFX support, they might have an example simulation.

Bioinst · November 10, 2010, 16:55

Ok thanks for the info. I'll stop looking for some and will get in touch with CFX support.

Cheers,

Callum

ghorrocks · November 11, 2010, 00:10

There is the spray drier tutorial. It does evaporation of water droplets in hot air, using lagrangian particle tracking. Is this of use?

playmaster · November 11, 2010, 03:13

You can check the (Axial Turbine Equilibrium and Non-Equilibrium Steam Predictions) tutorial to see the inverse phenomenon, where vapor is condensed in the last stages of steam turbines and water droplet is generated. I will give you an insight to solve your problem.

Bioinst · November 11, 2010, 16:03

Thanks Glenn and Playmaster. I've glanced through both tutorials quickly and am going to work through them now. I think combining parts from each I should be able to make some progress.

November 9, 2010, 20:27	Modelling Vapour Pressure in CFX	#1
Bioinst New Member Callum Johnston Join Date: Nov 2010 Posts: 3 Rep Power: 4	I'm wishing to model a system, part of which involves measuring the change in the vapour pressure of water due to a heat impulse. I believed I could do this in CFX after seeing some promotional material stating that it had models for evaporation and condensation. However, I'm new to CFX and am having trouble understanding how to implement this. I've worked through some of the tutorials provided with CFX but none of them seem to cover evaporation. Does anyone have a tutorial or advice as to how I'd go about implementing condensation or evaporation?

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November 10, 2010, 16:37		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 6,990 Rep Power: 59	I don't think any tutorial examples cover evaporation. Talk to CFX support, they might have an example simulation.

November 10, 2010, 16:55		#3
Bioinst New Member Callum Johnston Join Date: Nov 2010 Posts: 3 Rep Power: 4	Ok thanks for the info. I'll stop looking for some and will get in touch with CFX support. Cheers, Callum

November 11, 2010, 00:10		#4
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 6,990 Rep Power: 59	There is the spray drier tutorial. It does evaporation of water droplets in hot air, using lagrangian particle tracking. Is this of use?

November 11, 2010, 03:13		#5
playmaster New Member playmaster Join Date: Aug 2010 Posts: 13 Rep Power: 4	You can check the (Axial Turbine Equilibrium and Non-Equilibrium Steam Predictions) tutorial to see the inverse phenomenon, where vapor is condensed in the last stages of steam turbines and water droplet is generated. I will give you an insight to solve your problem.

November 11, 2010, 16:03		#6
Bioinst New Member Callum Johnston Join Date: Nov 2010 Posts: 3 Rep Power: 4	Thanks Glenn and Playmaster. I've glanced through both tutorials quickly and am going to work through them now. I think combining parts from each I should be able to make some progress.