Results 261 to 270 of about 5,522,348 (307)
Measurement of local effective diffusivity in heterogeneous biofilms
Water Science and Technology, 1998 We have developed a novel technique to measure local effective diffusivity distribution in heterogeneous biofilms. Mobile microelectrodes (tip diameter 10 μm) and the limiting current technique were employed to measure the effective diffusivity of ...
Haluk Beyenal
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Journal of Materials in Civil Engineering, 2020 In this paper, a two-step model is proposed to predict the effective chloride diffusivity of cement paste and cement mortar. The prediction effective chloride diffusivity results of cement paste and cement mortar are compared with two different ...
Rui He, Chuanqing Fu, Hai-Long Ye
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Estimation of Effective Moisture Diffusivity of Okra for Microwave Drying
Drying Technology, 2007 The effect of microwave output power and sample amount on effective moisture diffusivity were investigated using microwave drying technique on round okra ( Hibiscus esculentus L.).
Dilek Kilic Apar +2 more
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Diffusive Skin Effect in Zeolites
The Journal of Physical Chemistry Letters, 2022Effective contact and collision between reactants and active sites are essential for heterogeneous catalysis. Herein, we investigated molecular diffusion in more than 200 kinds of zeolites, and an intriguing "diffusive skin effect" was observed, whereby molecules migrated along the pore walls of zeolites (i.e., diffusion trajectories) because of the ...
Wei Rao +8 more
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Error dynamics of diffusion equation: Effects of numerical diffusion and dispersive diffusion
Journal of Computational Physics, 2014zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Tapan K. Sengupta, Ashish Bhole
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Effective diffusion constant for inhomogeneous diffusion
Journal of Physics A: Mathematical and General, 1993Summary: We consider the problem of determining analytically the effective diffusion constant \(D_{\text{eff}}\) for diffusion in an inhomogeneous medium, described by the diffusion equation \(\partial_ t P = \partial_ x[D(x) \partial_ x P]\) with a position-dependent diffusion coefficient \(D(x)\).
Revathi, S., Balakrishnan, V.
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The effect of diffusivity gradients on diffusion to dislocations
Philosophical Magazine, 1971The kinetic theory developed by Cottrell and Bilby (1949) and by Ham (1959) to describe the stress-assisted migration of point defects to dislocations is extended to take into account the gradient in diffusivity that exists in the stress field of dislocations.
H. K. Birnbaum, B. L. Eyre, W. Drotning
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The effects of Ca2+ on lipid diffusion
Chemistry and Physics of Lipids, 1986The effects of Ca2+ on rotational and translational diffusion of lipids in multilamellar dimyristoylphosphatidylcholine (DMPC)-water systems were investigated by time-resolved phosphorescence anisotropy steady-state fluorescence polarization and fluorescence recovery after photobleaching (FRAP) experiments.
Blatt, E., Vaz, W.
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Smoothing Effect of Degenerate Diffusion
Acta Applicandae Mathematicae, 2020zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Giuseppe Maria Coclite, Lorenzo di Ruvo
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Preferential diffusion effects in diffusion flames
2008Numerical computations were made of axisymmetric laminar jet diffusion flames taking into account detailed chemical kinetics and multicomponent diffusion. It was shown that preferential diffusion of heat and species causes significant amount of excess and deficit of enthalpy, and increase and decrease of mole fraction in the flame. These effects result
Toshimi Takagi +2 more
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