scholarly journals Modelling and Experimental Study of Moisture Transport in Wood, Taking into Account Diffusion and the Accompanying Adsorption of Water Vapour by Cell Walls

Materials ◽  
2020 ◽  
Vol 14 (1) ◽  
pp. 17
Author(s):  
Andrzej Kucharczyk ◽  
Kamil Pawlik
Keyword(s):  
Experimental Study ◽  
Moisture Content ◽  
Water Vapour ◽  
Moisture Transport ◽  
Cell Walls ◽  
Source Term ◽  
Proposed Model ◽  
Adsorption Of Water ◽  
Reverse Method ◽  
Two Parameter

The paper presents a model of moisture transport in wood taking into account diffusion and the accompanying adsorption of water vapour through the skeleton. A two-parameter form of the source term was proposed, depending on the distance of the current moisture content (MC) from the equilibrium state. The tests on cubic samples with a side of 2 cm were carried out which allowed to determine the coefficients of the proposed model on the basis of the reverse method. The tests were performed for pine, larch, oak and ash in all directions of orthotropy. Tests on thin samples were also performed to verify the source term.

scholarly journals Model of Moisture Transport in Wood, Taking Into Account Diffusion and the Accompanying Adsorption of Water Vapour Through the Skeleton

2020 ◽  
Author(s):  
Andrzej Kucharczyk ◽  
Kamil Pawlik
Keyword(s):  
Water Vapour ◽  
Moisture Transport ◽  
Mass Concentration ◽  
Source Term ◽  
Bound Water ◽  
Proposed Model ◽  
Adsorption Of Water ◽  
Current Mass ◽  
Reverse Method ◽  
Two Parameter

The paper presents a model of moisture transport in wood taking into account diffusion and the accompanying adsorption of water vapour through the skeleton. A two-parameter form of the source term was proposed, depending on the distance of the current mass concentration of bound water from the equilibrium state. The tests on cubic samples with a side of 2 cm were carried out which allowed to determine the coefficients of the proposed model on the basis of the reverse method. The tests were performed for pine, larch, oak and ash in all directions of orthotropy. Also the tests on thin samples were performed to verify the source term.

Adsorption of water vapour on solid surfaces

1951 ◽  
Vol 209 (1098) ◽  
pp. 297-308 ◽  
Keyword(s):  
Experimental Study ◽  
Water Vapour ◽  
Long Range ◽  
Polarized Light ◽  
Surface Effects ◽  
Solid Surfaces ◽  
Adsorbed Film ◽  
Adsorption Of Water ◽  
Molecular Layers

An experimental study has been made of the adsorption of water vapour on solid surfaces. Two methods are used, the first a direct weighing of the adsorbed film on a microbalance and the second an examination of polarized light reflected from the surface. Both methods agree and show that, for the surfaces examined, the adsorption of water at vapour pressures near saturation corresponds only to about two molecular layers. The experiments suggest that the heavy adsorption, which has been previously observed and which has been quoted as evidence for long-range surface effects, is due to contamination.

scholarly journals Adsorption of Water Vapour by Zinc Oxide, II

1949 ◽  
Vol 70 (1-2) ◽  
pp. 3-4
Author(s):  
Yutaka Miyahara ◽  
Isamu Sano
Keyword(s):  
Zinc Oxide ◽  
Water Vapour ◽  
Adsorption Of Water

Adsorption of Water Vapour on a Cleavage Surface of Lithium Fluoride

1962 ◽  
Vol 1 (4) ◽  
pp. 234-234 ◽  
Author(s):  
Koreo Kinosita ◽  
Hiroomi Kojima ◽  
Hideshi Yokota
Keyword(s):  
Water Vapour ◽  
Lithium Fluoride ◽  
Cleavage Surface ◽  
Adsorption Of Water

Effect of moisture content on dielectric properties of banana leaves and peels in frequency range of 1–20 GHz

Frequenz ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Soumya Sundar Pattanayak ◽  
Soumen Biswas
Keyword(s):  
Dielectric Constant ◽  
Dielectric Properties ◽  
Dielectric Loss ◽  
Moisture Content ◽  
Measurement Data ◽  
Banana Peel ◽  
Frequency Range ◽  
Proposed Model ◽  
Banana Leaves ◽  
Banana Leaf

Abstract The quality of agricultural products can be remotely sensed and enhanced by determining the dielectric properties. This paper studies the dielectric properties of banana leaf and banana peel over the frequency range 1–20 GHz using the open-ended coaxial probe (OCP) method. A new curve fitting model is proposed to characterize the dielectric properties of banana leaf and banana peel. The different moisture content (MC) levels are considered for both banana leaf and banana peel samples and, their dielectric properties are characterized. Further, the banana leaf and banana peel’s measurement data are compared with the data obtained using the proposed model. In addition, Root Mean Square Error (RMSE) and R-squared (R 2) are calculated to validate the performance of the proposed model. In case of banana leaf at 68.26% MC, the dielectric constant achieves the value of R 2 and RMSE of 0.98 and 0.0648, respectively. Similarly, dielectric loss achieves the value of R 2 and RMSE of 0.88 and 0.0795, respectively. Further, for banana peel at 80.89% MC, the dielectric constant achieves the value of R 2 and RMSE of 0.99 and 0.2989, respectively. Similarly, dielectric loss achieves the value of R 2 and RMSE of 0.96 and 0.6132, respectively.

Sign in / Sign up

Export Citation Format

Share Document