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Trying to write positive values

Posted 9 gen 2013, 16:28 GMT-5 Porous Media Flow Version 4.3a 0 Replies

Simin Akbariyeh
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I'm working on subsurface vapor intrusion modeling. In solute transport module I need to define a coefficient for vapor sorption which is also a nonlinear function of concentration. The function includes ln(c) in which all concentration values should be positive. Since I have some very small values of negative concentration in some parts, so the error message shown up each time that can not evaluate the log of negative values. Now I'm trying to define "c" to be just positive. How can I do that?
I really appreciated your help


Simin
0 Replies Last Post 9 gen 2013, 16:28 GMT-5
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Hello Simin Akbariyeh

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