Numerical Modeling of Air Flow in a Cabinet Dryer Equipped by Deflector Plates
-
Omid Reza Roustapour
,
Hamid Reza Gazor
and
Kazemi Farzin
Abstract
In this study, air deflector plates were used in order to increase the air elapsed time in the chamber. The air flow pattern was simulated using computational fluid dynamics. The geometry of the chamber was produced in 2D and meshed by triangular and quadrilateral elements, boundary conditions were defined and the governing equations solved. Modeling of flow without any deflectors depicted the air flowed to the chamber conducted to the outlet without any distortion. Air vortices were generated when the deflectors defined in model. To evaluate the influence of deflectors on drying period, constructed plates installed in the dryer chamber and melon slices were dried when deflectors used or not. Simulation results showed magnitude of the air velocity was increased and temperature uniform distribution developed on the surface of trays. The outlet temperature was also decreased up to 10 % and drying time reduced to 22 % when the deflectors were employed.
Nomenclature
Hydraulic diameter, mm
Turbulence intensity
Turbulence kinetic energy, m2s−2
Dry matter of product, kg
Initial matter of product, kg
Evaporated water, kg
Reynolds number
The velocity fluctuations, ms−1
The mean flow velocity, ms−1
Inlet air velocity, ms−1
Final moisture content of product (w.b.)
Initial moisture content of product (w.b.)
Turbulence dissipation rate, m2s−3
Air dynamic viscosity,
Turbulence viscosity,
Fluid density, kgm−3
References
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Articles in the same Issue
- Critical Review
- Significance of Temperature and Humidity Control for Agricultural Products Storage: Overview of Conventional and Advanced Options
- Articles
- Safe and Complete Extraction of Astaxanthin from Haematococcus pluvialis by Efficient Mechanical Disruption of Cyst Cell Wall
- Analysis of Volatile Compounds from Wheat Flour in the Heating Process
- Alternative Tempering of Sugar-Free Dark Chocolates by βv Seeding: Sensorial, Micro-Structural and Some Physical Properties and Volatile Profile
- Numerical Modeling of Air Flow in a Cabinet Dryer Equipped by Deflector Plates
- Effects of Microwave and Cold Plasma Assisted Hydrodistillation on Lemon Peel Oil Extraction
- A Culture-Independent Method for Enumeration of Viable Load of Lactobacillus acidophilus NCFM by using Real-Time PCR
