How to calculate the roughess exponent from a two dimensional power spectral desity of a fractured surface?

11 November 2013 1 658 Report

I want to study the surface evolution of a fractured surface. I'm interested in its scaling behavior so I want to calculate its roughness exponent from the 2D-PSD. However there are too many different expressions. Which one should I use?

Afaq Ahmad

Dear Pablo Acosta alba, Check the following articles available @ links provided below.

http://arxiv.org/pdf/cond-mat/0502419.pdf

http://arxiv.org/pdf/0707.1750.pdf

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