Concerning the alternating-sign dissipation of energy in a fluid with relaxing viscous stresses

Total equations of motion of an incompressible fluid are investigated taking account of relaxation phenomena for viscous stresses and heat flux. In the K. I. Strakhovich class of solutions the fluid flows are considered that contain a strong hydrodynamic discontinuity. The conditions of motion are analyzed under which the dissipative function is negative. Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 70, No. 6, pp. 967–974, November–December, 1997.