Freezer simulation

jhv_1729 · January 20, 2015, 05:20

Hi,

I am trying to simulate the performance of a freezer. The set point of the freezer is -30C. There are some products which will be delivered into the freezer at about 20C. There are a few heat flux boundaries also in the mix. the highest velocities seen will be around 7-8m/s.

Which would be a better solver for this setup:
1) buoyantSimpleFoam (Perfect Gas)
2) buoyantSimpleFoam (incompressible Perfect Gas) or
2) buoyantBoussinesqSimpleFoam?

Cheers,
JHV

tomf · January 21, 2015, 06:42

Hi,

I would go for option 1 in this case. You will have temperature differences of 50 K, around 268 K, which means that your differences are approximately 20 % of the mean temperature. This seems to be a bit too much for the linearized Boussinesq type equation of state.

Regards,
Tom

January 20, 2015, 05:20	Freezer simulation	#1
jhv_1729 New Member Harshad Joshi Join Date: Nov 2010 Location: UK Posts: 9 Rep Power: 15	Hi, I am trying to simulate the performance of a freezer. The set point of the freezer is -30C. There are some products which will be delivered into the freezer at about 20C. There are a few heat flux boundaries also in the mix. the highest velocities seen will be around 7-8m/s. Which would be a better solver for this setup: 1) buoyantSimpleFoam (Perfect Gas) 2) buoyantSimpleFoam (incompressible Perfect Gas) or 2) buoyantBoussinesqSimpleFoam? Cheers, JHV

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January 21, 2015, 06:42		#2
tomf Senior Member Tom Fahner Join Date: Mar 2009 Location: Breda, Netherlands Posts: 634 Rep Power: 32	Hi, I would go for option 1 in this case. You will have temperature differences of 50 K, around 268 K, which means that your differences are approximately 20 % of the mean temperature. This seems to be a bit too much for the linearized Boussinesq type equation of state. Regards, Tom