NDLI: Forced Convective Drying of a Porous Cube: Non-Intrusive Temperature and Mass Transfer Measurements

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Fanning, Eoin Persoons, Tim Darina, B. Murray
Copyright Year	2014
Abstract	The evolution of the mass transfer rate and temperature of a porous body in a convective drying process shows two main stages: A constant-drying rate period and a falling-drying rate period. This study investigates the simultaneous time evolution of moisture content and local surface temperature of a porous cube inside a rectangular flow channel for a range of air flow temperatures and Reynolds numbers. The moisture content is measured using a precision mass balance. Local surface temperature distribution is measured using a thermal imaging camera. In the constant-drying rate period, an average Nusselt number in the range 7.1 ≤ Nu ≤ 13.3 and an average Sherwood number of 4.7 ≤ Sh ≤ 6.0 are calculated for a Reynolds number range of 180 ≤ Re ≤ 595. Infrared thermography shows that the falling-drying rate period begins, the temperature distribution becomes non-uniform and approaches the temperature of the surroundings. This transition occurs first near the edges of the cube and, in particular, near the leading edge of the cube, as witnessed in previous studies.
File Format	PDF
ISBN	9780791849569
DOI	10.1115/IMECE2014-37522
Volume Number	Volume 8B: Heat Transfer and Thermal Engineering
Conference Proceedings	ASME 2014 International Mechanical Engineering Congress and Exposition
Language	English
Publisher Date	2014-11-14
Publisher Place	Montreal, Quebec, Canada
Access Restriction	Subscribed
Subject Keyword	Temperature distribution Temperature Air flow Reynolds number Imaging Flow (dynamics) Mass transfer Drying Thermography
Content Type	Text
Resource Type	Article

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