Unsteady-state flow of liquid of high thermal conductivity in a vapor-filled capillary in the presence of longitudinal heat flux

An unsteady-state flow of a liquid of high thermal conductivity (liquid metal) in a vapor-filled capillary is analyzed for the case where a heat flux of constant density is delivered to one of the interfaces. The velocity of liquid motion as a function of time is obtained. The accompanying heat and mass transfer processes are investigated. The effects associated with deviations from thermodynamic equilibrium in the vicinity of the interfaces are taken into account. For the liquid volume subjected to analysis, the duration of stages of formation of steady-state distributions of velocity and temperature is estimated.