Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Numerical analysis of the MBV parameter for plywood
Submission Author:
Guilherme Roiko , PR
Co-Authors:
Guilherme Roiko, Luís Mauro Moura
Presenter: Guilherme Roiko
doi://10.26678/ABCM.COBEM2017.COB17-1224
Abstract
In this study, a mathematical model was developed to calculate the vapor mass transfer in 1-D geometry with the aim of analyzing the measurement of the MBV index of hygroscopic materials used mainly in civil construction. Plywood boards with a thickness of 15 mm were used. The mathematical model was developed on the Matlab R2015a platform and Domus - Eletrobras software was also used. This model has the objective of applying NORDTEST protocol conditions to the physical experiments done by Meissner (2008). As the protocol propose humidity variation in the time for a constant temperature the isothermal hypothesis is used to the model, considering only the mass transfer by diffusion. For all moisture isotherms a different value of MBV was obtained, the higher values for the hygroscopic properties of the material of Wu (2007), followed by Osanyintola and Simonson (2006) and the lowest value for Domus - Eletrobras. The value found by the numerical model was close to the test-cell for Meissner (2008). It was analyzed the different results obtained by Meissner (2008) (worked on experimental apparatus for mass transfer) for his test cell and sample for the same physical experiment.
Keywords
MBV, Sorption, HAM
