Results 11 to 20 of about 8,075,923 (324)
Applied Sciences, 2022 The method of assessment of the “skin effect” for chloride ingress into concrete has been proposed, based on the inverse problem for the identification of at-surface variability of chloride diffusivity under fully saturated conditions.
Zbigniew Perkowski, Zofia Szweda
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Drying of porous media: an algorithm to determine effective parameters
Vietnam Journal of Science, Technology and Engineering, 2022 The drying process plays an important role in various industries such as chemical engineering, food, agriculture, and construction. The drying process is a complex one due to the phenomena of heat and mass transfer, which take place simultaneously.
Hong Thai Vu, Trung Dung Nguyen
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Persistence effects in deterministic diffusion [PDF]
Physical Review E, 2009 In systems which exhibit deterministic diffusion, the gross parameter dependence of the diffusion coefficient can often be understood in terms of random walk models. Provided the decay of correlations is fast enough, one can ignore memory effects and approximate the diffusion coefficient according to dimensional arguments. By successively including the
Gilbert, Thomas, Sanders, Paul
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Computing Effective Diffusivity of Chaotic and Stochastic Flows Using Structure-Preserving Schemes [PDF]
SIAM Journal on Numerical Analysis, 2017 In this paper we study the problem of computing the effective diffusivity for a particle moving in chaotic and stochastic flows. In addition we numerically investigate the residual diffusion phenomenon in chaotic advection.
Zhongjian Wang, J. Xin, Zhiwen Zhang
semanticscholar +1 more source
Journal of Natural Fibers, 2022 Banana pseudo-stem fiber drying was studied in a vertical fixed-bed convective dryer (60, 75, and 90°C). Nine mathematical models were used to analyze the drying behavior and the effective moisture diffusivity, activation energy, and thermodynamic ...
Genardo Queiroz de Oliveira +5 more
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The Impact of Wettability on Effective Properties of Cathode Catalyst Layer in a Proton Exchange Membrane Fuel Cell [PDF]
Hydrogen, Fuel Cell & Energy Storage, 2017 The produced liquid water in cathode catalyst layer (CCL) has significant effect on the operation of proton exchange membrane fuel cell (PEMFC). To investigate this effect, the transport of oxygen in CCL in the presence of immiscible liquid water is ...
Hossein Fathi +2 more
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Effective diffusivity of passive scalars in rotating turbulence [PDF]
, 2013 We use direct numerical simulations to compute turbulent transport coefficients for passive scalars in turbulent rotating flows. Effective diffusion coefficients in the directions parallel and perpendicular to the rotations axis are obtained by studying ...
Imazio, P. Rodriguez, Mininni, P. D.
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The effective diffusivity of ordered and freely evolving bubbly suspensions [PDF]
Journal of Fluid Mechanics, 2018 We investigate the dispersion of a passive scalar such as the concentration of a chemical species, or temperature, in homogeneous bubbly suspensions, by determining an effective diffusivity tensor.
Aurore Loisy, A. Naso, P. Spelt
semanticscholar +1 more source
BioResources, 2016 This article presents a methodology based on genetic algorithms (GA) optimization with a three-dimensional numerical solution to the diffusion model obtained by using the finite volume method (FVM) for determining the effective moisture diffusivity in ...
Shaojiang Zheng +3 more
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Multiple-scale analysis and renormalization for pre-asymptotic scalar transport [PDF]
, 2004 Pre-asymptotic transport of a scalar quantity passively advected by a velocity field formed by a large-scale component superimposed to a small-scale fluctuation is investigated both analytically and by means of numerical simulations.
Mazzino, A., Musacchio, S., Vulpiani, A.
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