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Transport in diluted species

Posted Feb 4, 2016, 5:43 a.m. EST Version 4.3 1 Reply

Ravi Kumar Garikina
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Hi,
I a modeling a time dependent mass transfer from a sphere into a fluid flowing past it in a cylindrical pipe.
Now when I am measuring the concentration at a particular point in the fluid, initially my concentration is becoming negative.
Can you help me with why this is happening?
Please see the attachment.

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1 Reply Last Post Feb 5, 2016, 9:31 a.m. EST
Lasse Murtomäki
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Posted: 8 years ago Feb 5, 2016, 9:31 a.m. EST
Hi

Your values are practically zero, of the order of 1e-15. I would not bother. The issue of negative concentrations is repeatedly discussed in this forum. Please check them

Lasse
Hi Your values are practically zero, of the order of 1e-15. I would not bother. The issue of negative concentrations is repeatedly discussed in this forum. Please check them Lasse

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