|
[Sponsors] |
Automatically applied heat flux due to species flux |
|
LinkBack | Thread Tools | Search this Thread | Display Modes |
November 17, 2021, 11:12 |
Automatically applied heat flux due to species flux
|
#1 |
Member
Join Date: Nov 2019
Posts: 98
Rep Power: 7 |
The species solver supports three types of boundary conditions, here's a table from the manual:
Table 31: Properties of the Wall Species Option
I'd like to ask how the highlighted energy is calculated and what is the physical reasoning behind such a heat source/sink. I'm trying to model evaporation and am applying the latent heat of evaporation as heat flux profile, but this automatic heat due to species flux at a boundary seems to be superimposed to what I prescribe. To reproduce this just prescribe a species flux at a boundary and plot the boundary heat flux on the same boundary. The energy solver must be switched on. Thanks for any clues! |
|
November 19, 2021, 07:08 |
|
#2 |
Senior Member
Joern Beilke
Join Date: Mar 2009
Location: Dresden
Posts: 534
Rep Power: 20 |
When you remove a species ( for instance 10 droplets of water) at the wall, then you also loose the energy of the removed species in your flow domain.
|
|
November 19, 2021, 09:49 |
|
#3 |
Member
Join Date: Nov 2019
Posts: 98
Rep Power: 7 |
Would you say it's the enthalpy then, as in , whre i are all species? What would be the reference temperature though, 0 Kelvin? I also noticed there's a field function called ThermalDiffusionFluxEnergySource but I couldn't find any documentation on it.
Last edited by FliegenderZirkus; November 19, 2021 at 11:39. |
|
November 22, 2021, 11:53 |
|
#4 |
Senior Member
Joern Beilke
Join Date: Mar 2009
Location: Dresden
Posts: 534
Rep Power: 20 |
This look right. I expect, that ccm+ does this calculation automatically.
|
|
Tags |
diffusion, heat flux, species |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Heat Flux due to electron flow in GTAW welding process | redwanamit034 | FLUENT | 0 | August 11, 2017 18:26 |
Question about heat transfer coefficient setting for CFX | Anna Tian | CFX | 1 | June 16, 2013 07:28 |
Heat Flux at wall in a conjugate heat transfer problem | Chander | CFX | 2 | July 9, 2011 23:22 |
UDF for heat flux applied during T seconds | nazeem | FLUENT | 0 | June 22, 2004 06:26 |
UDF for a heat flux applied during T second on a w | nazeem | FLUENT | 0 | June 12, 2004 11:28 |