title: Heat transfer in the Knudsen layer.
abstract: A concept of the surface heat conductivity determining a heat transfer in the Knudsen layer was introduced. It has the same order with respect to the Knudsen number as the bulk heat transfer and must be taken into account in practical calculations. Using the Onsager principle the coefficient of the surface heat conductivity was related to the thermal slip coefficient.
authors.affiliation: Departamento de Física, Universidade Federal do Paraná, Caixa Postal 19044, 81531-990, Curitiba, Brazil. sharipov@fisica.ufpr.br
authors.forename: Felix
authors.initials: F
authors.lastname: Sharipov