CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > OpenFOAM > OpenFOAM Pre-Processing

Issue related to Constant heat flux Boundary condition

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

LinkBack Thread Tools Search this Thread Display Modes
Old   March 5, 2021, 03:13
Default Issue related to Constant heat flux Boundary condition
Saurav Kumar
Join Date: Jul 2016
Posts: 80
Rep Power: 7
srv537 is on a distinguished road
I want to specify constant heat flux Boundary condition as below and i have two questions
1. what are the difference between externalWallHeatFluxTemperature and fixedGradient BC?

2. I am getting some error for below BC

type externalWallHeatFluxTemperature;
mode flux;
q uniform 1446; // (q = W/m^2)
kappaMethod fluidThermo;
kappa none;
kappaMethod fluidThermo;
value $internalField;

// type fixedGradient;
// gradient uniform 55223; //{ DT/Dn = q (w/m^2) / K_air (W/m-K) = 1446/0.026 = 55223 }
It is showing below error in OF8

Cannot find a fluidThermo or solidThermo instance

From function Foam::tmp<Foam::Field<double> > Foam::temperatureCoupledBase::kappa(const fvPatchScalarField&) const
in file derivedFvPatchFields/temperatureCoupledBase/temperatureCoupledBase.C at line 133."

FOAM exiting

srv537 is offline   Reply With Quote

Old   March 12, 2021, 14:31
Fabian Friberg
Join Date: Dec 2020
Posts: 31
Rep Power: 3
lumpor is on a distinguished road
Maybe it doesn't matter since it should skip the second one, but try removing the duplicate "kappaMethod fluidThermo;" row?
lumpor is offline   Reply With Quote

Old   March 16, 2021, 04:39
Senior Member
Join Date: Sep 2013
Posts: 324
Rep Power: 17
Bloerb will become famous soon enough
You might be trying to use it with a solver that is not using solid or fluidThermo.
Bloerb is offline   Reply With Quote


Thread Tools Search this Thread
Search this Thread:

Advanced Search
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 Off
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
Simulating constant heat flux value at solid-solid boundary Y27 STAR-CCM+ 6 September 8, 2020 09:56
Table bounds warnings at: END OF TIME STEP CFXer CFX 4 July 16, 2020 23:44
Wind turbine simulation Saturn CFX 58 July 3, 2020 01:13
My radial inflow turbine Abo Anas CFX 27 May 11, 2018 01:44
Implement constant heat flux boundary condition new_at_this Main CFD Forum 2 April 6, 2012 23:35

All times are GMT -4. The time now is 12:09.