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August 1st, 2017, 05:37 AM   #1
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Inner Boundary Condition

Q:/ What is the reason for letting the inner boundary condition = (-1) when solving the radial flow of infinite form of diffusivity equation, and I would like to know what would happen if I didn't equate it with (-1).

As in the attached pic: https://i.imgur.com/AVesmHM.png

and here is the original pdf if you want: http://www.pe.tamu.edu/blasingame/da..._DimLssVar.pdf

Last edited by skipjack; August 1st, 2017 at 04:16 PM.
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August 1st, 2017, 09:22 AM   #2
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I think you will find that the -1 refers to a sink, where the flow is leaving the plane of section
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August 1st, 2017, 02:40 PM   #3
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Quote:
Originally Posted by studiot View Post
I think you will find that the -1 refers to a sink, where the flow is leaving the plane of section
Thanks, but I don't think the (-1) refers to sink term; I think it is more related to mathematical convenience, but I don't know the exact/detailed explanation of it.

Last edited by skipjack; August 1st, 2017 at 04:17 PM.
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