Determination of Flow and Heat Transfer Parameters in Porous Media with Consideration of Density Variation of Working Fluid

in International Symposium (oral presentation paper), 國際研討會(全文口頭發表)
標題Determination of Flow and Heat Transfer Parameters in Porous Media with Consideration of Density Variation of Working Fluid
出版類型國際研討會(全文口頭發表)
出版年度2000
AuthorsWei Te Wu(Benny), 吳瑋特
出版日期Nov 5 2000 12:0
會議地點Orlando, Florida, USA.
其他編號0000
中文摘要

An experimental investigation is conducted to determine
the flow and heat-transfer parameters of porous media with the
consideration of density-variation effect of the working fluid.
The permeability (K), inertial coefficient (F), and local
convective heat transfer coefficient (hloc) are determined for
two types of metal screens at Reynolds numbers ranging from
20 to 400. A single-blow transient technique combined with a
compressible non-local-thermal-equilibrium model determines
the hloc. The compressible non-local-thermal-equilibrium model
is also adopted in a Levenberg-Marquardt optimization
technique for deducing the K and F from measured steady-state
pressure drops at different flow rates. Results show that the
permeability increases with the increase of the porosity. A set of
empirical correlations is obtained for calculating the Nusselt
number. Results also show that, under the test condition of this
study, consideration of the density-variation effect would
improve the accuracy in deducing the K, F, and hloc.

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