Results 271 to 280 of about 31,500 (286)

Moisture Effective Diffusivity in Porous Media with Different Physical Properties

Defect and Diffusion Forum, 2006
In the drying of porous media, the mass transport occurs in the pores as well as on the surface of the solid. The mechanisms involved can take place simultaneously, influenced by the predominant one and can change depending on the moisture content.
Miranda M.N.N., M.A. Silva
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Effective moisture diffusivity of plain yogurt undergoing microwave vacuum drying

Journal of Food Engineering, 1995
Abstract The effective moisture diffusivity of yogurt was estimated by the method of slopes of the drying curve and the regular regime technique using the isothermal drying data obtained by microwave vacuum drying. The use of microwave vacuum drying seemed advantageous for obtaining the isothermal data.
Suk Shin Kim, Santi R. Bhowmik
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Effect of porosity on moisture diffusion during drying of pasta

Journal of Food Engineering, 1996
Abstract Heat and mass transfer studies were conducted with pasta cylinders at different porosities, temperatures and pressures. Tests with pasta cylinders were conducted at porosities of 6 and 26%, temperatures of 40, 55, 71 and 105 °C and total pressures of 77, 101 and 202 kPa.
Kurt M. Waananen, Martin R. Okos
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A Method of Determination of Concentration Dependent Effective Moisture Diffusivity

Drying Technology, 1995
ABSTRACT A method based on Fourier series solution to Fick's diffusion equation has been proposed to evaluate effective diffusivity (D) as a function of moisture content in agricultural materials undergoing shrinkage during drying process. The shrinkage kinetics of the particulate was used to correlate its instantaneous size (spherical equivalent ...
G.S.V. Raghavan, T.N. Tulasidas, S.S. Sablani, H.S. Ramaswamy   +3 more
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Moisture in Composites: The Effect of Supersonic Service on Diffusion

Journal of Composite Materials, 1975
Tests were conducted to determine whether aircraft flight conditions change moisture absorption behavior in graphite-epoxy composites. Flight temperature profiles were simulated for a subsonic mission, -65°F (-54°C) for 90 minutes, and for a flight involving a subsonic segment with a supersonic dash. The simulated dash involved rapid heating to a peak
E.L. McKague, J.E. Halkias, J.D. Reynolds   +2 more
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Effective moisture diffusivity in biopolymer drops by regular regime theory

Food Hydrocolloids, 2004
Abstract The effective moisture diffusivity coefficient (Deff) of maltodextrin DE 10 (MD-10), gum arabic (GA), mesquite gum (MG) and ovalbumin (OA) drop solutions was calculated using regular regime theory. Isothermal drying of the biopolymer drops was done at 50, 60, 70 and 80 °C with a thermogravimetric analyzer, and changes in drop shape upon ...
J.G. Báez-González, C. Pérez-Alonso, C.I. Beristain, E.J. Vernon-Carter, M.G. Vizcarra-Mendoza   +4 more
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A Mathematical Model of Effective Moisture Diffusivity for Lychee Drying

International Conference on Crop Harvesting and Processing, 2013
The objectives of this research were to develop an effective moisture diffusivitymodel and to study the effect of drying air temperature on dried product quality. Thethin layer-drying model in spherical form was studied. Analytical method wasextensively used in the experimental estimation of effective moisture diffusivity.
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The Effect of Path Diffusion on The Effective Moisture Diffuslvlty in Carrot Slabs

Drying Technology, 1997
ABSTRACT In order to evaluate the effect of path diffusion on the average moisture diffusivity in carrot. drying curves for different shaves (slices and cylinders) and temperatures of 50, 60 and 70°C were ohtained takine into consideration the use of an average leneth of carrot sample (slice thickness or the cylinder radio). The.
M.A. Ruiz-Cabrera, M.A. Salgado-Cervantes, K.N. Walislewski-Kubiak, M.A. y Garcίa-Alvarado   +3 more
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THE EFFECT OF MOISTURE ON PHOSPHORUS DIFFUSION IN COAL MINE SPOILS

Soil Science, 1980
Phosphorus diffusion coefficients (D) have been measured as a function of water tension (Psi) and water content (theta) in topsoil and spoil samples from two coal mine sites in western North Dakota. For all four soils, the observed dependence of D upon Psi and theta can be well described by equations of the form D = Ae/sup -aphi/ + B and D = K (theta-E)
J. W. HARRELL, M. SAEED
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Effects of Fibre Permeability on Moisture Diffusion Coefficients of Polymeric Composites

Polymers and Polymer Composites, 1993
A single fibre composite model reinforced with a permeable fibre is used to evaluate the moisture diffusion coefficient analytically. Due to the fibre permeability, absorption of moisture takes place through both the fibre and the matrix. The diffusion paths around the fibre, due to their curved nature, are generated using the cubic spline theory. The
P.K. Aditya, P.K. Sinha
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