scholarly journals Measurement of mass diffusion coefficients using nonexponential forced Rayleigh scattering signals

1998 ◽  
Vol 109 (1) ◽  
pp. 267-274 ◽  
Author(s):  
D. R. Spiegel ◽  
A. H. Marshall ◽  
N. T. Jukam ◽  
H. S. Park ◽  
T. Chang
Keyword(s):  
Diffusion Coefficients ◽  
Rayleigh Scattering ◽  
Mass Diffusion

Mass transition and mass diffusion coefficients in a diffuse interface model

2019 ◽  
Vol 94 (12) ◽  
pp. 125702
Author(s):  
Lun Sheng Pan ◽  
Jing Lou ◽  
Hong Ying Li ◽  
Chang Wei Kang
Keyword(s):  
Diffusion Coefficients ◽  
Mass Diffusion ◽  
Diffuse Interface ◽  
Interface Model ◽  
Diffuse Interface Model

Anisotropy of Binary Mass Diffusion Constants in Nematic, Smectic A and Smectic B Phases Studied by Forced Rayleigh Scattering

1985 ◽  
Vol 24 (Part 2, No. 10) ◽  
pp. L777-L780 ◽  
Author(s):  
Masahiko Hara ◽  
Hiroyuki Tenmei ◽  
Seiji Ichikawa ◽  
Hideo Takezoe ◽  
Atsuo Fukuda
Keyword(s):  
Rayleigh Scattering ◽  
Mass Diffusion ◽  
Smectic A ◽  
Diffusion Constants

Role of Variable Conductance on Heat and Mass Transport Mechanism Using Generalized Theory

2020 ◽  
Vol 13 (2) ◽  
Author(s):  
Imran Haider Qureshi ◽  
Ahmed Elmoasry ◽  
Jawdat Alebraheem ◽  
M. Nawaz
Keyword(s):  
Thermal Conductivity ◽  
Heat Conduction ◽  
Chemical Reaction ◽  
Diffusion Coefficients ◽  
Mass Diffusion ◽  
Memory Effects ◽  
Temperature Dependent ◽  
Newton's Law ◽  
Newton’S Law ◽  
The Impact

Abstract Fourier law of heat conduction, its analog Fick's first law, and Newton's law of viscosity are classical laws that are not capable of exhibiting memory effects. Conservation laws based on these classical laws do not give predictions about memory effects on the transport phenomena. Recently, proposed novel laws are called Cattaneo–Christov heat flux. Models are based on the generalization of classical laws of heat conduction, mass diffusion, and Newton's law of viscosity. This investigation considers this generalized theory to model the impact of relaxation phenomenon on the transport of momentum, heat, and mass in Maxwell fluid (viscoelastic fluid) of temperature-dependent viscosity and thermal conductivity in the presence of temperature-dependent mass diffusion coefficients. It is observed from the simulations that memory effects play a key role in controlling momentum, thermal and concentration boundary layer thicknesses. It is also noted that the rate of diffusion of heat and mass has shown an increasing trend when thermal conductivity and mass diffusion coefficients are increased via rise in temperature of the fluid. The generative chemical reaction on the transport of specie relative to the impact on the transport of specie when it is compared with the impact of destructive chemical reaction on the transport of specie.

Mass diffusion coefficients of oxygenated fuel additives in air

Energy ◽  
2009 ◽  
Vol 34 (10) ◽  
pp. 1560-1564 ◽  
Author(s):  
Ying Guo ◽  
Maogang He ◽  
Qiu Zhong ◽  
Ying Zhang
Keyword(s):  
Diffusion Coefficients ◽  
Mass Diffusion ◽  
Fuel Additives ◽  
Oxygenated Fuel

Microscale Mass Diffusion Sensing of Polymer Solutions Using Soret Forced Rayleigh Scattering

2008 ◽  
Author(s):  
Yuji Nagasaka
Keyword(s):  
Diffusion Coefficient ◽  
Polymer Films ◽  
Diffusion Coefficients ◽  
Rayleigh Scattering ◽  
Casting Process ◽  
Scattering Method ◽  
Binary Solutions ◽  
Forced Rayleigh Scattering Method ◽  
Cross Diffusion ◽  
The Cross

In the casting process of highly functional films, the control of complex micro and nano structures inside the polymer films is one of the most critical factors. The control requires the cross diffusion coefficients in multicomponent solutions because it has a direct influence on the formation of fine structures inside polymer films during the casting process [1]. However, most studies on diffusion in polymer solutions concentrate on measuring diffusion coefficients in binary solutions and only a few measurement techniques of the cross diffusion coefficient can be found. We have developed a measurement technique for the mutual diffusion coefficient in binary solutions, namely Soret forced Rayleigh scattering method [2–4]. In the present paper, we have applied Soret forced Rayleigh scattering method to measure the binary mass diffusion coefficient for the clarification of the cross diffusion phenomena in multicomponent diffusion.

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