Nusselt number over theta

govind_IITD · January 1, 2024, 02:08

That's fine but my question is why multiplied by alpha_eff to get the flux?

I am very curious to know about the heat flux calculation and implementation.

dlahaye · January 1, 2024, 04:30

Does it help you to look into the physical dimensions first?

govind_IITD · January 1, 2024, 05:37

Yes, It helps.

h = enthalpy (kg.m^2/s^2) per unit mass (H/m): m^2/s^2

grad(h): m/s^2

And if we multiply with alpha which is m^2/s, then it comes out to be m^3/s^3.

Where do we go from here in openfoam?

dlahaye · January 1, 2024, 07:00

Not sure what you mean.

You can either run a heat transfer solver (bouyantSimpleFoam, rhoSimpleFoam or other) and study the results for various parameters.

Or you can study the implementation.

What do you want to do?

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January 1, 2024, 02:08		#21
govind_IITD New Member Goind Sharma Join Date: Sep 2018 Posts: 25 Rep Power: 8	That's fine but my question is why multiplied by alpha_eff to get the flux? I am very curious to know about the heat flux calculation and implementation.

January 1, 2024, 04:30		#22
dlahaye Senior Member Domenico Lahaye Join Date: Dec 2013 Posts: 802 Blog Entries: 1 Rep Power: 18	Does it help you to look into the physical dimensions first?

January 1, 2024, 05:37		#23
govind_IITD New Member Goind Sharma Join Date: Sep 2018 Posts: 25 Rep Power: 8	Yes, It helps. h = enthalpy (kg.m^2/s^2) per unit mass (H/m): m^2/s^2 grad(h): m/s^2 And if we multiply with alpha which is m^2/s, then it comes out to be m^3/s^3. Where do we go from here in openfoam?

January 1, 2024, 07:00		#24
dlahaye Senior Member Domenico Lahaye Join Date: Dec 2013 Posts: 802 Blog Entries: 1 Rep Power: 18	Not sure what you mean. You can either run a heat transfer solver (bouyantSimpleFoam, rhoSimpleFoam or other) and study the results for various parameters. Or you can study the implementation. What do you want to do?