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lenght integration or exponential integral

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Old   July 5, 2010, 11:09
Default lenght integration or exponential integral
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Hello,

I'm a beginner with OpenFoam and I have to use the exponential integral function but I can't find out how to implement it in my C program. I've tried "::Ei" but it didn't work. Is there a special library to include at the beginning?

The other solution I have would be to integrate my function. I've already looked on the programmer's guide but there is nothing of the sort. Does somebody know how to fix it?

Thank you for your help,

Ingrid
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