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Interfacial Roughness

Kuperman and Ingenito [49] obtained the following interface condition for an interface with RMS roughness :

where the elements of A are given by:



The subscripts 1 and 2 denote properties in the upper and lower media, respectively. For a free surface the appropriate result is obtained by letting and go to zero. Note that this formula also breaks down in a catastrophic fashion if is too large.

Michael B. Porter
Tue Oct 28 13:27:38 PST 1997