THERMAL SCIENCE

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Doğan Engin Alnak

,

Koray Karabulut

ANALYSIS OF HEAT AND MASS TRANSFER OF THE DIFFERENT MOIST OBJECT GEOMETRIES WITH AIR SLOT JET IMPINGING FOR FORCED CONVECTION DRYING

ABSTRACT
In the present work, the effect of the different geometric moist objects with straight and reverse semi-circular on the heat and mass transfer enhancement of the jet drying was conducted with a numerical analysis. The drying jet was a laminar 2-D jet stationed at a constant jet distance from the moist object. The diameter of the object, jet distance from the moist object and initial jet height were fixed in all cases. Temperature and mass distributions were obtained inside the object for different jet velocities. A finite volume method was used to solve the governing equations for momentum and energy by using ANSYS Fluent 17.0 software program. Calculations were performed for four different Reynolds numbers, namely, Re = 100, 200, 300, and 400. It was found good agreement with the experimental data available in the literature. The results showed that the geometry of straight semi-circular moist object had better performance of heat and mass transfer than that of the reverse moist object geometry. In addition, increasing Reynolds number showed a positive effect on heat and mass transfer. Locally, jet drying was found to be most effective near the stagnation point on the leading side of the objects.
KEYWORDS
drying, fluid flow, jet impingement, mass transfer
PAPER SUBMITTED: 2016-07-21
PAPER REVISED: 2017-06-01
PAPER ACCEPTED: 2017-06-21
PUBLISHED ONLINE: 2017-07-08
DOI REFERENCE: https://doi.org/10.2298/TSCI160721151A
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2018, VOLUME 22, ISSUE Issue 6, PAGES [2943 - 2953]
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Analysis of heat and mass transfer of the different moist object geometries with air slot jet impinging for forced convection drying

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence