|
[Sponsors] |
UDF Source terms not producing expected results... |
|
LinkBack | Thread Tools | Search this Thread | Display Modes |
July 31, 2008, 15:55 |
UDF Source terms not producing expected results...
|
#1 |
Guest
Posts: n/a
|
Hi, I'm hoping some people out there have had a similar experience with modling UDF source terms. My problem is the following:
2 streams with two separate fluids, separated by a solid, basically a conjugate heat transfer problem. The specifics are: 2-D axisymmetric, laminar, pressure-based solver, solving energy and multi-species transport, using the mixture model. I model source terms in a UDF for each stream, the calculated source terms are exactly what they should be - I have checked with a calculator. If I set it so that there is exactly enough mass of a species coming into each stream, such that the source term uses all of that species up, such that there should be exactly zero mass left at the outlet, then I get an erroneous concentration profile. The simulation does not show expected behaviour... even if i set the mass fractions at the outlets, it doesn't have the right effect - there is still too much of one species in the stream. I know my solution is wrong because I get the right solution for a different geometrical setup... this makes me think I have set something wrong in Fluent. Any ideas what it might be? Thanks, Emmanuel |
|
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
UDF: Source terms | Novice | FLUENT | 0 | January 13, 2009 05:17 |
Source terms... again | AdN | FLUENT | 9 | April 27, 2006 05:34 |
UDF - source terms | Fred | FLUENT | 2 | October 11, 2005 21:53 |
Surce Terms fluent bad results | Mihai | FLUENT | 2 | May 11, 2005 08:36 |
Help.. Source terms.. | Diana | FLUENT | 1 | July 4, 2002 01:06 |