EXPERIMENTAL STUDIES AND NUMERICAL-SIMULATION OF EVAPORATIVE COOLING OF AIR WITH A WATER SPRAY .2. HORIZONTAL COUNTER FLOW

Hollow cone water sprays are used in many humidifying, cooling and scr ubbing applications. In a companion paper by Kachhwaha et al. Experime ntal studies and numerical simulation of evaporative cooling of air wi th a water spray: part I-horizontal parallel flow; International Journ al of Heat and Mass Transfer, 1996a (submitted), a detailed study of h ollow cone water sprays in horizontal parallel flow has been given. In this paper the studies have been extended to a horizontal counterflow configuration where reversal of the direction of motion of some drops is considered. These set of equations are space marched numerically a nd the solution is obtained in an iterative manner. The water spray no zzle was located at the wind tunnel exit face, facing upstream, for ob taining experimental data for this configuration. Model predictions of air condition change agree well with experimental data. (C) 1997 Else vier Science Ltd.