Eventos Anais de eventos
ENCIT 2018
Brazilian Congress of Thermal Sciences and Engineering
DETERMINING EFFECTIVE DIFFUSION COEFFICIENT OF BANANAS DURING DRYING PROCESS USING DIFFERENTIAL EVOLUTION
Submission Author:
Flavia Bernardo , PR
Co-Authors:
Flavia Bernardo, Andrey Colaço, Marcelo Borges dos Santos, Marcos Batistella Lopes, Viviana Mariani
Presenter: Marcos Batistella Lopes
doi://10.26678/ABCM.ENCIT2018.CIT18-0183
Abstract
The objective of this study was to explore, via computational simulation, the capability of an inverse problem method to determine the effective diffusion coefficient of water in banana from experimental data of drying. Heat transfer and moisture at the center of the banana using the explicit 1D FDM with drying temperatures in the range between 17-65ºC and moisture in the range between 0.01-3.43 was investigated. The mathematical model considered the effects of convective heat and mass transfer at surface of fruit. The banana was represented as a homogenous and isotropic fruit material. Assuming one-dimensional drying process and known thermophysical properties of the food material, temperatures were generated at different locations of the banana sample by numerically solving the partial differential equations for heat and mass transfer. The equations systems are solved to obtain solution to the inverse problem. The optimization method, Differential Evolution (DE), was then applied efficiently to find the best coefficients of the effective diffusion coefficient that varies with the moisture. The goal of this optimization method is to reduce the uncertainty and approach essentially unique solution for each case studied
Keywords
Effective diffusion coefficient, FDM, Heat and mass transfer, Optimization, Differential Evolution
