On the Meaning of Replacing the Force of Friction after Navier-Stokes by That of Guldberg-Mohn

Abstract

When κρ²u, in the equations of motion, is replaced by-ku, there may be the following correspondence: where n is any positive integer.
This correspondence is found from two solutions, one. of which is from κρ²u-type equation and the other from ku-type equation, when expanded in infinite seies.