Results 271 to 280 of about 289,178 (308)

Measurement of diffusion coefficients in dry anaerobic digestion media

Chemical Engineering Science, 2013
Dry 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, Benbelkacem, Hassen, Gourdon, Rémy, Buffière, Pierre   +3 more
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Identification of the Diffusion Coefficient of a Drying Process

IFAC Proceedings Volumes, 1982
Abstract 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).
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Determination of Concentration Dependent Diffusion Coefficient from Drying Rates

1985
When 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, Munehiro Hoshika, Yuji Sano   +2 more
openaire   +1 more source

Diffusion Coefficient Relationships during Drying of Soya Bean Cultivars

Biosystems Engineering, 2007
A 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
openaire   +1 more source

NONDESTRUCTIVE MEASUREMENT OF MOISTURE DIFFUSION COEFFICIENT IN WOOD DRYING

Drying Technology, 1992
ABSTRACT 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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DETERMINATION of HEAT TRANSFER COEFFICIENTS DURING DRYING of FOODSTUFFS

Journal of Food Process Engineering, 1995
Heat transfer coefficients during drying of foods were evaluated from drying data and heat and mass balances. Experimental drying curves for slices and cylinders of potato, apple and carrot were obtained in a laboratory dryer under different drying conditions.
C. RATTI, G.H. CRAPISTE
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Mass Transfer Volume Coefficient in Fluidized Bed Drying

1999
Ispitan je utjecaj protoka i temperature zraka na tok i brzinu sušenja čestica silikagela. Korelacija eksperimentalnih i literaturnih rezultata pokazuje zadovoljavajuće slaganje.
Prlić Kardum, Jasna, Skansi, Darko
openaire  

Air drying of vegetables: Evaluation of mass transfer coefficient

Journal of Food Engineering, 1997
Abstract A new equation for the external mass transfer coefficient during vegetable drying is presented. The equation is validated for carrot slices dried under natural convection conditions. A finite element method is used to solve the non-linear boundary value problem modelling the carrot drying process.
openaire   +1 more source

NONLINEAR NUMERICAL APPROXIMATIONS OF TRANSPORT COEFFICIENTS AND PHENOMENOLOGICAL COEFFICIENTS GOVERNING THE COCOA DRYING PROCESS

Abstract Cocoa beans are highly coveted products in the food and cosmetics industries due to their numerous therapeutic properties. These products generally have high humidity or intermediate humidity, hence the importance of their stabilization by drying.
Aubin KINFACK JEUTSA, Jean Nganhou
openaire   +1 more source