Solve for L: Unknown Exponential Function & Plain Side

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SUMMARY

The discussion focuses on solving the equation [C3/C1*L] = e^(-C2*L) for the variable L, where C1, C2, and C3 are constants. The Lambert W function is identified as a necessary tool for finding L analytically. The equation can be rearranged into the standard form C2L e^(C2L) = C1C2/C3, which is suitable for applying the Lambert W function. For those unable to use this function, numerical methods are recommended as an alternative solution.

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lookingforhlp
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I am doing a heat transfer problem and I need to solve for the length of something. I have reduced the equation to this:

[C3/C1*L] = e^(-C2*L)

Find L
Where: C1, C2, & C3 are constants

Please help I am in a real bind!
 
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You need a function such as the Lambert W function. Otherwise solve numerically.

C2L e^(C2L)=C1C2/C3

is the standard form for the Lambert W function
 

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