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Old 03-25-2010, 03:54 PM   #1
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boundary integration

I'm trying to use boundary integration in Comsol to find the mass flux (kg/sec) of methane coming out of a combustion unit. However the answer I get is higher than inlet methane which gives negative conversion. I'm wondering if there is any other precise way of integrating a data set of (x,y) which has very small y values.
Old 03-26-2010, 08:47 AM   #2
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If small y values, and therefore floating point precision is your problem, can you not simply scale the variable up before doing the integration?



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