Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/22356
Title: Effects of initial mist conditions on simulation accuracy of humidity distribution in an environmental chamber
Authors: Pu, L
Xiao, F 
Li, Y
Ma, Z
Keywords: CFD simulation
Droplet size distribution
Environmental chamber
Humidity distribution
Issue Date: 2012
Publisher: Pergamon Press
Source: Building and environment, 2012, v. 47, no. 1, p. 217-222 How to cite?
Journal: Building and environment 
Abstract: This paper firstly presents experimental study of humidity distribution in an environmental chamber at different inlet temperatures and humidity. Experiment results show that, under fixed inlet temperature condition, the uniformity of the relative humidity (RH) in the chamber is better when the inlet RH is higher. It is mainly because of the coupled heat and mass transfer occurred between water droplets and air. In practice, direct measurement of humidity distribution in a chamber is infeasible and CFD simulation is a possible way to predict the humidity distribution. However, the use of CFD tools for predicting humidity field is rarely reported. Boundary and initial mist conditions are critical to the accuracy and computation efficiency of CFD simulation. This study then presents a CFD simulation method of the humidity distribution inside chamber using FLUENT based on some assumptions and simplification. Moreover, droplet sizes were measured by laser diffraction analyzer. The simplified droplet size distribution is used as initial condition for CFD simulation. Experiment results and CFD simulation results are compared and it can be concluded that the CFD simulation method can achieve satisfactory accuracy with reasonable computation load.
URI: http://hdl.handle.net/10397/22356
ISSN: 0360-1323
EISSN: 1873-684X
DOI: 10.1016/j.buildenv.2011.07.020
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