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Pressure Coefficient in Dam-Break Flows of Dry Granular Matter
Journal of Hydraulic Engineering, 2013AbstractThe propagation of dry granular flows, such as rock and snow avalanches, can be described by depth-averaged models. Different from classical shallow-water equations, these models take into account the anisotropy of normal stresses inside the flowing pile through using an earth pressure coefficient in the pressure term.
SARNO, LUCA +3 more
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Evaluation of convective heat transfer coefficient in crop drying under open sun drying conditions
Energy Conversion and Management, 2001Abstract In this paper, an attempt has been made to evaluate the convective heat transfer coefficient operating in crop drying in open sun drying conditions (natural convection). Values of the constants, C and n were obtained by linear regression analysis from experimental data obtained for six crops, namely green chillies, green peas, Kabuli ...
S.I. Anwar, G.N. Tiwari
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Water diffusion coefficient in clay material from drying data
Desalination, 2005In this paper we present an experimental investigation in the drying of clay material. Three type of purified clay are used in this study. We work under different experimental conditions changing the temperature or the relative humidity of the drying air. Drying kinetics and diffusion coefficient are presented and commented on.
Saber Chemkhi, Féthi Zagrouba
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Drying of Latex Backcoated Acrylic Fabrics: Heat Transfer Coefficients
Textile Research Journal, 1988Drying and curing tests were performed in a laboratory scale dryer on dyed tufted acrylic fabrics and the latex adhesive backcoating to obtain heat transfer coefficients as a function of the mass velocity of air flowing through the fabric. Treating the fabric as a packed bed of cylindrically shaped fibers, equations were developed making it possible ...
Douglas D. Jinks, Michael J. Matteson
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Measurement of diffusion coefficients in dry anaerobic digestion media
Chemical Engineering Science, 2013Dry anaerobic digestion of solid wastes is now commonly used at the industrial scale. Dry solid content in waste material is usually higher than 15%. w/w in these processes most industrial technologies in dry modes are not mixed, or sometimes intermittently mixed. In these situations convective transfer is negligible and diffusive transfer predominates
Bollon, Julien +3 more
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Identification of the Diffusion Coefficient of a Drying Process
IFAC Proceedings Volumes, 1982Abstract A procedure for identifying the mass diffusion coefficient of a drying process is proposed. Two simple models are used for the drying of shelled corn, where the mass diffusion coefficient is a function of state variables i.e. moisture content and temperature of the product.
R. Bertin, S. Boverie
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Shrinkage Coefficient: Drying Microcrack Indicator
In order to investigate the material behaviour in reality (macro-level) during drying shrinkage at early age, the shrinkage coefficient (αsh) is determined in the laboratory at micro-level on specially prepared and dried (1 mm) thick cement paste specimens. Drying shrinkage experiments are performed in Environmental Scanning Electron Microscope (ESEM).openaire +1 more source
Determination of Concentration Dependent Diffusion Coefficient from Drying Rates
1985When the diffusion coefficient decreases with decreasing concentration, an isothermal drying process(desorption process), in which the surface concentration holds its equilibrium value, can be divided into two stages. In the first stage, where the process can be considered as diffusion in a semi-infinite medium, the initial desorption rate is usually ...
Shuichi Yamamoto +2 more
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Diffusion Coefficient Relationships during Drying of Soya Bean Cultivars
Biosystems Engineering, 2007A drying kinetics equation, the diffusive analytical solution for short times previously developed for wheat, was utilised to explore its applicability for a larger grain as soya bean, in order to determine diffusion coefficients and their dependence with temperature. Thin-layer drying of cv.
M.C. Gely, S.A. Giner
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NONDESTRUCTIVE MEASUREMENT OF MOISTURE DIFFUSION COEFFICIENT IN WOOD DRYING
Drying Technology, 1992ABSTRACT The computer tomography(CT image of wood was analyzed to estimate the moisture content from CT number. Comparing moisture contents, densities and CT numbers, moisture distributions were nondestructively determined by CT numbers detected with the scanner.
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