Vapor condensation on liquid surface due to laminar jet-induced mixing

Abstract

The effects of system parameters on the interface condensation rate in a laminar jet-induced mixing tank are numerically studied. The physical system consists of a partially filled cylindrical tank with a subcooled jet discharge from the center of the tank bottom toward the liquid-vapor interface which is at a saturation temperature corresponding to the constant tank pressure. Liquid is also withdrawn from the outer part of the tank bottom to maintain the constant liquid level. The steady-state conservation equations in nondimensiohal form are solved by a finite-difference method for various system parameters including liquid height to tank diameter ratio (////>), tank to jet diameter ratio (Did}, liquid outflow to jet area ratio (Aout/A7), and a heat leak parameter (Nh) which characterizes the uniform wall heat-flux. It is found that the average Condensation Stanton number (Stc) is decreasing with increasing H/D, Did, and Nh. For small Nh9 Stc is nearly independent of Aout/A,. For R€J ^ 600, Stc is essentially equal to (d/D)2 if (Did} > 20 and Nh « 1.