الفهرس 
AbstractOnly 14 pages are availabe for public view
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Abstract
Theoretical and experimental investigations are carried out to analyze and predict the humidification process of air flowing in a horizontal direction by water spray in a parallel flow configuration. This process is used in many engineering applications. For predicting the flow field of water droplet-air two phase flow, a theoretical model simulating the conservation of mass, momentum and energy of water and air is developed. For air, flow is assumed to be laminar and one dimensional and equations are modeled in Eulerian coordinates. For water droplets, the flow is modeled in Lagrangian coordinates in two dimensions. Atomization process of liquid water and its resulting spray characteristics are modeled using correlation from literature. The resulting governing equations are first order coupled ordinary differential equations. These equations are discretized in order to transform them into algebraic equations using Euler method. A FORTRAN code is developed to solve these equations simultaneously. A parameter is defined in order to describe the heat transfer potential (equivalent temperature difference) in the situation of simultaneous heat and mass transfer. Experimental results are obtained using a horizontal wind tunnel facility. The test section, of the experimental work is of a square duct cross section. Theoretical predictions of outlet conditions of air for giving inlet conditions agree well with both obtained experimental results and those of previous work reported in literature. As a result, the present proposed theoretical model is fairly valid to describe the process of air humidification by parallel flow water spray. According to the theoretical model, the effects of heat and mass transfer potentials, air flow rate, water flow rate and duct dimensions on air outlet conditions are also studied.