The Simulation of Fluid Flow and Heat Transfer in a Fluidized Bed Spray Dryer with a Vortex Generator 30° toward the Y Axis

DOI

10.2991/aer.k.220131.061How to use a DOI?

Keywords

Bed Spray; Vortex Generator; Fluid flow; Heat Transfer

Abstract

The Fluidized Bed Spray Dryer is a spray drying machine that works by treating the milk solution particles as a fluid, which flows in a 2-phase stream at different temperatures. The purpose of this research are to see the vortex phenomenon that formed and the effect in heat transfer process, later compared with temperature distribution during experiment. In this simulation, the Spray Dryer has a Vortex Generator with a specification of 30° to the Y axis and opposing each other (Cross Flow). This simulation was carried out at 5 different temperatures with air flow velocity of 26 m/s, inlet flow rate of 5.83 x 10-4 kg/s, injector diameter of 0.1 mm, the injector spray angle width of 45° and the droplet size of 5µm. The injector is placed in 3 conditions. The first is located under the vortex generator hole in as far as 4cm and the second is parallel to exhaust of vortex generator, and third is above the vortex generator hole in as far as 4cm. The simulation results from this study are visualized in the form of contour plots on the distribution of heat transfer, heat transfer coefficient and turbulence intensity, as well as path lines of air flow velocity. Thus, from the simulation results, it was found that the vortex occurred in the first silo, with a turbulence intensity value of 174%, making the heat distribution in the first silo evenly distributed. The highest convection coefficient value is achieved at injector position 1, 4mm below the air duct tip, the value is 58.8 W/ m²K.

Copyright

© 2022 The Authors. Published by Atlantis Press International B.V.

Open Access

This is an open access article under the CC BY-NC license.

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TY  - CONF
AU  - Pratomo Setyadi
AU  - Nugroho Gama Yoga
AU  - Muhammad Rizqi
AU  - Fajar Nur Amsir
PY  - 2022
DA  - 2022/02/01
TI  - The Simulation of Fluid Flow and Heat Transfer in a Fluidized Bed Spray Dryer with a Vortex Generator 30° toward the Y Axis
BT  - Proceedings of the Conference on Broad Exposure to Science and Technology 2021 (BEST 2021)
PB  - Atlantis Press
SP  - 405
EP  - 410
SN  - 2352-5401
UR  - https://doi.org/10.2991/aer.k.220131.061
DO  - 10.2991/aer.k.220131.061
ID  - Setyadi2022
ER  -