How to get flow?

nygrenm · January 15, 2015, 12:16

I am having trouble setting up how the flow would be in a rectangular heat exchanger from an inlet pipe. My problem is that when I set up the continua and choose fluid it assumes that the whole thing is already fluid. How do I go about changing this so that only the inlet is fluid and the rest is empty space so I can study what the fluid does in the area?

me3840 · February 9, 2015, 01:08

STAR-CCM+ cannot simulate 'empty space' since it relies on continuum mechanics. You need to fill the 'empty space' with air, which means this is a multiphase simulation. It sounds like you need to use the VOF model.

January 15, 2015, 12:16	How to get flow?	#1
nygrenm New Member Sicher Nygren Join Date: Oct 2014 Posts: 11 Rep Power: 11	I am having trouble setting up how the flow would be in a rectangular heat exchanger from an inlet pipe. My problem is that when I set up the continua and choose fluid it assumes that the whole thing is already fluid. How do I go about changing this so that only the inlet is fluid and the rest is empty space so I can study what the fluid does in the area?

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February 9, 2015, 01:08		#2
me3840 Senior Member Join Date: Nov 2010 Location: USA Posts: 1,232 Rep Power: 24	STAR-CCM+ cannot simulate 'empty space' since it relies on continuum mechanics. You need to fill the 'empty space' with air, which means this is a multiphase simulation. It sounds like you need to use the VOF model.