CFD Online Logo CFD Online URL
Home > Forums > CFX

Inlet or a mass source as a function of local flow

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

LinkBack Thread Tools Display Modes
Old   June 12, 2006, 14:53
Default Inlet or a mass source as a function of local flow
Posts: n/a
Hello all

Is it possible to define an inlet or a mass source as a function of local flow parameters, rather than as a constant? And what would be the correct way to model that, if possible?

Any advice on this would be most welcome.

Thank you in advance.


  Reply With Quote

Old   June 12, 2006, 16:31
Default Re: Inlet or a mass source as a function of local
Posts: n/a
Have a look at the room temperature - thermostat tutorial.
  Reply With Quote

Old   June 20, 2006, 14:54
Default Re: Inlet or a mass source as a function of local
Posts: n/a
Hello Joe

Thank you for your answer. I took a look at the tutorial and found it rather enlightening, but I still have a few problems. I'll explain them, maybe you or someone else can give me useful hints. I'm fairly sure this would be a trivial problem if I had any experience with this kind of thing…

I'm trying to simulate the evaporation of a layer of water, surrounding a solid placed within an enclosure, when exposed to currents of hot air, in order to study local intensities and rates of the drying process. A steady-state setup using a constant, calculated water inlet on the solid works just fine as an initial approximation, since a look at Conservative water mass fractions provides reasonable qualitative evaluations of local evaporation intensities throughout the geometry.

I would now need to implement a transient run in order to simulate the drying process over time, preferably expressing the inlet or mass source in terms of local conditions such as water vapor concentrations or convection heat transfer coefficients. From what I gather I'd have to use User Fortran (since apparently normal CEL expressions do not have access to data from the previous timesteps), but I don't have the faintest idea about User Fortran.

Any advice would be most welcome, not to mention sorely needed...

Thank you in advance. HC

  Reply With Quote


Thread Tools
Display Modes

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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
swak4foam building problem GGerber OpenFOAM Installation 54 April 24, 2015 16:02
Combination of mass flow inlet and pressure inlet boundaries MrStuebb Main CFD Forum 0 January 6, 2011 10:59
BlockMesh FOAM warning gaottino OpenFOAM Native Meshers: blockMesh 7 July 19, 2010 14:11
mass flow inlet Mech FLUENT 2 July 7, 2006 07:37
Could anybody help me see this error and give help liugx212 OpenFOAM Running, Solving & CFD 3 January 4, 2006 19:07

All times are GMT -4. The time now is 13:30.