How can I identify the powers and the coefficient of a semi-known 2 variable function?
3 views (last 30 days)
Show older comments
Ege Keskin
on 7 Dec 2018
Answered: Walter Roberson
on 8 Dec 2018
I am currently trying to corralate Reynold's and Prundtl number to find the Nusselt number. The equation is Nu = C*Re^n*Pr^m , where C,n,m are non integer constants. I have 5 pieces of data where I know Nu,Re, and Pr. My aim is to find C,n,m. I have looked through a bunch of curve fitting techniques but all of them seem to work only for integer powers. Any suggestions?
0 Comments
Accepted Answer
Walter Roberson
on 8 Dec 2018
take logs.
log(Nu) = log( C) + n * log(Re) + m * log(Pr)
This is a linear system easily fit with the \ operator
0 Comments
More Answers (0)
See Also
Categories
Find more on Polynomials in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!