Convective drying performance of porous moist objects under turbulent flow conditions: effects of object shape and material
International Journal of Numerical Methods for Heat & Fluid Flow
ISSN: 0961-5539
Article publication date: 29 October 2021
Issue publication date: 16 May 2022
Abstract
Purpose
The purpose of this paper is to examine the coupled heat and mass transport of different shaped porous moist objects in a rectangular channel under the effects of convective drying. Numerical simulations were performed under turbulent conditions for cylindrical, triangular and rectangular shaped different food products in a two-dimensional channel.
Design/methodology/approach
Finite element method was used for the unsteady problem and, effects of drying air velocity (AV) and temperature on transport mechanism were evaluated. Three different food materials were used for the circular shaped object and drying performance of the products under different conditions was compared.
Findings
Results showed that, changing the air temperature has an important effect on drying for all shaped objects and all materials. The same effect was seen for the AV as, increasing the velocity had positive effects on drying. Two identical objects were placed in the channel one behind the other, and this configuration showed that location of the object in the channel is also important for drying. The moisture content in the object at the front is lower than in the object behind at the end of drying.
Originality/value
This paper can provide technical support to optimize drying performance in the industry with comprehensive data for the process.
Keywords
Acknowledgements
This study is supported from the (the scientific and technological research council of turkey-tubitak) under the grant no: 119M050 which is gratefully acknowledged.
Citation
Coban, S.O., Selimefendigil, F. and Oztop, H. (2022), "Convective drying performance of porous moist objects under turbulent flow conditions: effects of object shape and material", International Journal of Numerical Methods for Heat & Fluid Flow, Vol. 32 No. 7, pp. 2454-2475. https://doi.org/10.1108/HFF-06-2021-0408
Publisher
:Emerald Publishing Limited
Copyright © 2021, Emerald Publishing Limited