Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
Numerical Simulation of the moisture content in rough rice drying process in a fixed bed
Submission Author:
Franciane Cristina Rodrigues Carvalho , MG , Brazil
Co-Authors:
Franciane Cristina Rodrigues Carvalho, José Leôncio Fonseca de Souza
Presenter: Franciane Cristina Rodrigues Carvalho
doi://10.26678/ABCM.COBEM2019.COB2019-1018
Abstract
This article presents a numerical study off the rough rice drying process in a fixed bed. The study considered the following parameters: air temperature and volume flow, grains initial moisture content. The mathematical model used in literature was verified based on the influence of the air temperature and humidity partial differentials related to time, as those terms are neglected in simplified mathematical models used by other researches. The air temperature and air absolute humidity partial differentials and grains temperature and moisture content partial differentials were numerically solved using the finite elements method, through COMSOL Multiphysics software. The data acquired using the simulation were compared to experimental data obtained in literature, referring to moisture content of the rough rice bed. As a result, the complete model- using the air temperature and humidity partial differentials - presents a closer alignment with experimental data for bed depth near to the warm air input. The numbers on the improvement are measured using relative error and mean relative deviation, resulting on a improvement up to 23.51% for the relative error and up to 12.12% for the mean relative deviation.
Keywords
Grains drain, Numerical simulation, Numerical studies, Partial differential equation, Numeric Methods
