Butterfly heat transfer recipe failure

[Junoh]

I’m trying to use heat transfer recipe in butterfly, but it keeps stop at time=1 stage.
I guess it is because T variable.
Could anyone please help me calculating outdoor temperature modelling using butterfly and heat transfer recipe?
Did I do something wrong about the components?

[Junoh]

it works well for steady incompressible recipe.

[tutu7931]

Same here, wonder why??

[kinonotofu]

If you are using Butterfly_Create Case from Tunnel, it will not run properly.
In that case, run Butterfly_Solution first. Then all the boundary conditions for T and p_rgh will be set to zeroGradient, so set them manually and run ir.bat.

[LongXiangyu]

Same here, wonder why?

[LongXiangyu]

sir, i still dont know how to solve it , can you explain it in detail?

[kinonotofu]

First, the OpenFOAM case folder is output in %USERPROFILE%butterfly. When you run Butterfly_Solution, the configuration files such as boundary conditions and ir.bat for running the solver will be output to that folder and the calculation will be executed.

However, if you use Butterfly_Heat Transfer Recipe for a case created from Butterfly_Create Case from Tunnel, the boundary conditions for T and p_rgh will not be output correctly. So, open the T and p_rgh files in the 0 folder and set the boundary conditions manually.

//T 20 degC
type	fixedValue;
value	uniform 293.15;

//p_rgh wall
type	fixedFluxPressure;
value	uniform 0;
rho		rhok;

//p_rgh outlet
type	fixedValue;
value	uniform 0;

//T outlet, p_rgh inlet
type	zeroGradient;

If you run Butterfly_Solution again, it will only output the wrong boundary conditions again, so you need to run ir.bat manually for the calculation.

[LongXiangyu]

sir，i’ve set these boundary conditions as you said, but it still dosent run, i dont know why. i never run the simulation in this way, could you tell me whats going wrong？

[kinonotofu]

You need to set boundary conditions on all boundaries.
I do not know how many boundaries are in your calculation. You need to modify the number and names of the boundaries in the attachment files to fit your case.
p_rgh (1.3 KB)
T (1.3 KB)

[LongXiangyu]

thanks for your help!!!

[ysun]

Hi,

Thanks a lots ! But I think it only works if we don’t ask parallel computing.

Is there anything to change in decomposePar file if we want multi processing calculation ?

[kinonotofu]

I don’t think you need to worry about it, just decomposePar after setting p_rgh and T.