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Effects of diffusive property heterogeneity on effective matrix diffusion coefficient for fractured rock [PDF]
Water Resources Research, 2006 Heterogeneities of diffusion properties are likely to influence the effective matrix diffusion coefficient determined from tracer breakthrough curves. The objectives of this study are (1) to examine if it is appropriate to use a single, effective matrix diffusion coefficient to predict breakthrough curves in a fractured formation, (2) to examine if a ...
Zhang, Yingqi +3 more
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Mathematical Biosciences and Engineering, 2019 In the present paper, renormalization group methods are used to develop a macroscopic turbulence model for thermal diffusivity in turbulent fluid flow under conditions of endothermic and exothermic chemical reactions in flow.
Andriy A. Avramenko, Igor V. Shevchuk
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, 2020 Direct numerical simulation of diffusion through heterogeneous media can be difficult due to the computational cost of resolving fine-scale heterogeneities.
Carr, Elliot J. +2 more
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Vacuum Drying Characteristics of Some Vegetables [PDF]
Iranian Journal of Chemistry & Chemical Engineering, 2011 In this research the drying of four kinds of vegetables was investigated in a vacuum dryer. The effect of temperature on drying rate of samples at various temperatures (30, 35 and 45 °C) was studied.
Esmaeil Zakipour, Zohreh Hamidi
doaj
Modeling and Effects of Various Drying Methods on Sweet Potato Starch Properties
Walailak Journal of Science and Technology, 2011 Eleven mathematical models (Lewis, Page, Henderson and Pabis, modified Henderson and Pabis, Wang and Singh, logarithmic, two term, two term exponential, Midilli, approximation of diffusion and Verma et al, model) were used for describing the drying ...
Ho Minh THAO, Athapol NOOMHORM
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Effective diffusivity in yacon potato cylinders during drying
Revista Brasileira de Engenharia Agrícola e AmbientalThe aim of this study was to obtain the effective diffusivity of yacon potato in fixed-bed dryer at different temperatures (50, 60 and 70 ºC) and drying air velocities (1.0, 1.5 and 2.0 m s-1).
Cícera G. C. de Lisboa +5 more
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Oilseeds and fats, crops and lipids, 2014 The fundamental analysis and modeling of kinetics of solvent extraction of rapeseed oil enable the quantification of the “washing” and “diffusion” steps. Both are illustrated through “starting accessibility” and “effective diffusivity”
Allaf Tamara +5 more
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Effective Isentropic Diffusivity of Tropospheric Transport [PDF]
, 2014 Tropospheric transport can be described qualitatively by the slow mean diabatic circulation and rapid isentropic mixing, yet a quantitative understanding of the transport circulation is complicated, as nearly half of the isentropic surfaces in the ...
Chen, Gang, Plumb, R. Alan
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Can disorder enhance incoherent exciton diffusion? [PDF]
, 2015 Recent experiments aimed at probing the dynamics of excitons have revealed that semiconducting films composed of disordered molecular subunits, unlike expectations for their perfectly ordered counterparts, can exhibit a time-dependent diffusivity in ...
Lee, Elizabeth M. Y. +2 more
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Multiscale Modeling & simulation, 2018 In this paper, we study the problem of computing the effective diffusivity for particles moving in chaotic flows. Instead of solving a convection-diffusion type cell problem in the Eulerian formulation (arising from homogenization theory for parabolic ...
Zhongjian Wang, J. Xin, Zhiwen Zhang
semanticscholar +1 more source