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September 28, 2015, 16:21 |
Calculating Convection and Diffusion
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#1 |
New Member
Wade
Join Date: Jul 2015
Posts: 24
Rep Power: 11 |
Hello,
I using Star-CCM+ to simulate the flow of hot (750 C), pure helium out of a small (2 mm ID) hole into room temperature air at atmospheric pressure. My question is whether there is a way to tease out convection and diffusion information for helium into air and air into helium. Thank you. |
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October 5, 2015, 21:30 |
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#2 |
Senior Member
Join Date: Nov 2010
Location: USA
Posts: 1,232
Rep Power: 25 |
I don't understand the question. Tease out?
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October 5, 2015, 21:59 |
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#3 |
New Member
Wade
Join Date: Jul 2015
Posts: 24
Rep Power: 11 |
Sorry, I was trying to ask if there is a way to obtain numerical values for the convection and diffusion. For instance, you can export the values for temperature, velocity, mass fraction, etc. Is there a similar way to export convection and diffusion information?
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October 5, 2015, 22:31 |
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#4 |
Senior Member
Join Date: Nov 2010
Location: USA
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Shouldn't you be able to just make field functions for these? Maybe:
U-convection: div($Density*$$Velocity[0]*$$Velocity) U-diffusion: div($DynamicViscosity*grad($$Velocity[0])) |
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October 6, 2015, 13:14 |
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#5 |
New Member
Wade
Join Date: Jul 2015
Posts: 24
Rep Power: 11 |
Thank you for that suggestion. I have not done much with field functions yet. I will look into them and see if they will help me solve the problem I am working on.
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Tags |
convection., diffusion |
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