# Wall Condensation Model

 Register Blogs Members List Search Today's Posts Mark Forums Read

 December 13, 2012, 11:26 Wall Condensation Model #1 Member   Camilo Costa Join Date: Jun 2009 Posts: 34 Rep Power: 10 Hi!! I need set my inlet condition with the same mass that was condensed near the wall How can i do this? With this function is possible? areaInt(H2O.Condensation Mass Flux)@COLD_WALL Thx for all!!

 December 13, 2012, 13:03 #2 Member   Camilo Costa Join Date: Jun 2009 Posts: 34 Rep Power: 10 Monitoring the pressure in the time it was found that it always increases. This means that the mass of steam entering More than out by condensation. That is, the input term for mass is greater than the condensation in the wall. However I can not find the error in my equations that was placed in a condition of entry. Last edited by camilo_costa; December 13, 2012 at 13:30.

 December 13, 2012, 17:34 #3 Super Moderator   Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 14,208 Rep Power: 110 This means you have a multiphase simulation, so isn't what you really want to be the mass of the water phase at the inlet equals the water condensed out? But I do not see why you are doing it this way, it does not sound physically realistic. Why not just specify an inlet with a constant volume fraction, then the water phase will naturally move from there to the area where it is condensing due to diffusion and possibly convection. This sounds like a more realistic setup.

December 17, 2012, 14:21
#4
Member

Camilo Costa
Join Date: Jun 2009
Posts: 34
Rep Power: 10
Quote:
 Originally Posted by ghorrocks This means you have a multiphase simulation, so isn't what you really want to be the mass of the water phase at the inlet equals the water condensed out? But I do not see why you are doing it this way, it does not sound physically realistic. Why not just specify an inlet with a constant volume fraction, then the water phase will naturally move from there to the area where it is condensing due to diffusion and possibly convection. This sounds like a more realistic setup.

Dear Glenn Horrocks,

You were right! Isnīt necessary set the condensation rate as the same rate of evaporation. When I set the mass flux (inlet condition) constant the pressure and the temperature increase consequently the condensation rate increase too. And the mass balance is conserved.
Thx!!!

 Thread Tools Display Modes Linear Mode

 Posting Rules You may not post new threads You may not post replies You may not post attachments You may not edit your posts BB code is On Smilies are On [IMG] code is On HTML code is OffTrackbacks are On Pingbacks are On Refbacks are On Forum Rules

 Similar Threads Thread Thread Starter Forum Replies Last Post zyy95900 FLUENT 5 November 15, 2017 17:13 a.hasan FLUENT 0 March 27, 2012 07:40 mehrdadeng CFX 10 February 25, 2011 06:25 Henry Main CFD Forum 7 May 19, 2006 10:40 Matthew Okasinski FLUENT 0 May 12, 2000 15:07

All times are GMT -4. The time now is 00:55.