CFD MODELLING OF NATURAL CONVECTION HEAT AND MASS TRANSFER IN HYGROSCOPIC POROUS MEDIA
作者:
M. Prakash,
Ö.F. Turan,
Y. Li,
G. R. Thorpe,
期刊:
Drying Technology
(Taylor Available online 2000)
卷期:
Volume 18,
issue 10
页码: 2175-2201
ISSN:0737-3937
年代: 2000
DOI:10.1080/07373930008917837
出版商: Taylor & Francis Group
关键词: low permeability porous media;moisture migration;numerical simulations;stored agricultural produce;turbulence;turbulent natural convection
数据来源: Taylor
摘要:
This paper presents the derivation of a model to predict heat and mass transfer in a system consisting of a turbulently flowing fluid overlying a saturated hygroscopic porous medium. Comparisons with experimental and numerical simulations have been carried out to check the accuracy of components of the model. Finally, a case study using silica gel as a representative hygroscopic porous medium is presented as an application of the model. It is shown that moisture is convected from the warm interior of a bulk of porous medium to the relatively cool periphery. This result has profound practical implications when the hygroscopic medium is stored agricultural produce as the region of high moisture content may become moldy.
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