Variational Approach to the Shock Wave

抄録

By using the local potential for the Boltzmann-type equations, a reasonable profile equation is derived on the basis of the minimal entropy rate principle postulated for stationary irreversible processes. The equation is a sort of moment equation containing a number of variational parameters. The ambiguities included in the conventional moment theories are removed. As an example, Mott-Smith’s model is examined as a trial function, which reduces the steadiness of shock waves for the strong cases.