نتایج جستجو برای: effective diffusivity

تعداد نتایج: 691832  

Journal: :Journal of Nuclear Science and Technology 1993

Journal: :iranian journal of hydrogen and fuel cell 0
hossein fathi department of mehcanical engineering, shahid bahonar university of kerman, kerman, iran seyed hossein mansouri department of mechanical engineering, shahid bahonar university of kerman, kerman, iran amir raoof department of earth sciences, utrecht university, utrecht, netherlands

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 studied applying a two-dimensional pore scale model. the ccl was reconstructed as an agglomerated system. to explore the wettability effects, diffe...

2014
Lauren Walker Wijitha Senadeera

An investigation of the drying of spherical food particles was performed, using peas as the model material. In the development of a mathematical model for drying curves, moisture diffusion was modelled using Fick’s second law for mass transfer. The resulting partial differential equation was solved using a forward-time central-space finite difference approximation, with the assumption of variab...

2005
Krzysztof Burdzy Robert Ho David Ingerman

We study two dimensional Brownian motion in an ordered periodic system of linear reflecting barriers using the sampling method and conformal transformations. We calculate the effective diffusivity for the Brownian particle. When the periods are fixed but the length of the barrier goes to zero, the effective diffusivity in the direction perpendicular to the barriers differs from the standard one...

2011
Alexey N. Volkov Leonid V. Zhigilei

A mesoscopic computational model for simulation of gas flow through carbon nanotube (CNT) films is developed. The model is implemented in a parallel computational code enabling massively parallel dynamic simulations of CNT materials at length scales relevant to experimental studies. Self-diffusivity of Ar within CNT films with 9% volume fraction of the nanotubes and the effective diffusivity of...

Journal: :پژوهش های علوم و صنایع غذایی ایران 0
elham ansarifar mohebbat mohebbi fakhrii shahidi mahdi varidi

the objective of this study was to evaluate the effect of frying temperature, time and different batter formulations on the rheological properties and mass transfer during deep fat frying of kurdish cheese nuggets. the effects of white egg (0, 5, 10%) addition to the batter formulation of cheese nuggets and frying at 150, 170 and 190◦c for 0, 1, 2, 3 and 4 min have been investigated. the result...

ایزدی, لیلا, محمدی, سید ابوالقاسم, همدمی, ناصر,

The microbial and enzyme activity in different points within cheese and quality of final product are determined by local concentrations of salt and moisture in aqueous phase. To predict the evolution of moisture content in different layers of the Iranian white cheese during brining, constant and variable moisture diffusion coefficients were determined using experimental moisture time–dependent ...

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