Problem using rhoReactingbuoyantFoam to simulated Hydrogen dispersion in air

enthusiast · January 17, 2022, 10:12

Dear Foamers,

I am using OF version 8, I am trying to simulate H2 dispersion in the air using rhoReactingbuoyantFoam. I have disabled chemistry and combustion, I have managed to run the solver, in order to validate the solver I am using data from this technical paper.

Fiates, J., & Vianna, S. S. V. (2016). Numerical modeling of gas dispersion using OpenFOAM. Process Safety and Environmental Protection, 104, 277–293. https://doi.org/10.1016/J.PSEP.2016.09.011

The CFD test case which I have used for validation comprises of 1x0.1x0.05 geometrical structure with a 2.7mm diameter at the center.

Inlet velocity = 321 m/s and the Temperature of the methane gas is 260K.

I tried to validate the methane mole fraction decay with the provided simulation data and experimental data in the published paper.

For the same given case, my simulation model is over predicting the methane concentration decay over the axial length.

I have attached the plot and the case file.

I have taken the thermophysical properties from the tutorial case file.

Any kind of assistance to resolve my case file will really help me a lot.

Thank you

methane concentration.PNG

rhoReactingBuoyantFoam_methane_dispersion_validation.zip

cfdwave · December 15, 2023, 19:36

Hi
Akshay, I was wondering did you manage to simulate H2 dispersion with OpenFOAM. I am looking into same problem and was wondering what is the best solver and boundary conditions for the simulation. I assume for H2 dispersion we should also account for heat transfer between ground, air and liquid hydrogen pool? I am looking at chtMultiRegionTwoPhaseEulerFoam solver which seems to be designed to handle similar type problems. Have you used this solver and any advice or sample case that you can share would be really appreciated.

Regards
Ashkan

January 17, 2022, 10:12	Problem using rhoReactingbuoyantFoam to simulated Hydrogen dispersion in air	#1
enthusiast New Member Akshay Join Date: Jan 2020 Posts: 28 Rep Power: 6	Dear Foamers, I am using OF version 8, I am trying to simulate H2 dispersion in the air using rhoReactingbuoyantFoam. I have disabled chemistry and combustion, I have managed to run the solver, in order to validate the solver I am using data from this technical paper. Fiates, J., & Vianna, S. S. V. (2016). Numerical modeling of gas dispersion using OpenFOAM. Process Safety and Environmental Protection, 104, 277–293. https://doi.org/10.1016/J.PSEP.2016.09.011 The CFD test case which I have used for validation comprises of 1x0.1x0.05 geometrical structure with a 2.7mm diameter at the center. Inlet velocity = 321 m/s and the Temperature of the methane gas is 260K. I tried to validate the methane mole fraction decay with the provided simulation data and experimental data in the published paper. For the same given case, my simulation model is over predicting the methane concentration decay over the axial length. I have attached the plot and the case file. I have taken the thermophysical properties from the tutorial case file. Any kind of assistance to resolve my case file will really help me a lot. Thank you methane concentration.PNG rhoReactingBuoyantFoam_methane_dispersion_validation.zip

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December 15, 2023, 19:36		#2
cfdwave New Member Ashkan Rafiee Join Date: Jun 2015 Posts: 16 Rep Power: 10	Hi Akshay, I was wondering did you manage to simulate H2 dispersion with OpenFOAM. I am looking into same problem and was wondering what is the best solver and boundary conditions for the simulation. I assume for H2 dispersion we should also account for heat transfer between ground, air and liquid hydrogen pool? I am looking at chtMultiRegionTwoPhaseEulerFoam solver which seems to be designed to handle similar type problems. Have you used this solver and any advice or sample case that you can share would be really appreciated. Regards Ashkan