The dependence of the phasic response of the taste nerves on stimulus flow rate arises in the diffusion boundary layer region at the lingual surface: A convective-diffusion analysis

2017 ◽  
Vol 168 ◽  
pp. 289-308 ◽  
Author(s):  
John A. DeSimone
Keyword(s):  
Boundary Layer ◽  
Flow Rate ◽  
Convective Diffusion ◽  
Diffusion Boundary Layer ◽  
Phasic Response ◽  
Diffusion Boundary ◽  
Lingual Surface ◽  
Diffusion Analysis ◽  
Boundary Layer Region ◽  
Layer Region

scholarly journals Transport and Deposition of Large Aspect Ratio Prolate and Oblate Spheroidal Nanoparticles in Cross Flow

Processes ◽  
2019 ◽  
Vol 7 (12) ◽  
pp. 886
Author(s):  
Hans O. Åkerstedt
Keyword(s):  
Boundary Layer ◽  
Diffusion Equation ◽  
Convective Diffusion ◽  
Planck Equation ◽  
Deposition Rates ◽  
Fokker Planck Equation ◽  
Analytical Results ◽  
Boundary Layer Region ◽  
Layer Region ◽  
Convective Diffusion Equation

The objective of this paper was to study the transport and deposition of non-spherical oblate and prolate shaped particles for the flow in a tube with a radial suction velocity field, with an application to experiments related to composite manufacturing. The transport of the non- spherical particles is governed by a convective diffusion equation for the probability density function, also called the Fokker–Planck equation, which is a function of the position and orientation angles. The flow is governed by the Stokes equation with an additional radial flow field. The concentration of particles is assumed to be dilute. In the solution of the Fokker–Planck equation, an expansion for small rotational Peclet numbers and large translational Peclet numbers is considered. The solution can be divided into an outer region and two boundary layer regions. The outer boundary layer region is governed by an angle-averaged convective-diffusion equation. The solution in the innermost boundary layer region is a diffusion equation including the radial variation and the orientation angles. Analytical deposition rates are calculated as a function of position along the tube axis. The contribution from the innermost boundary layer called steric- interception deposition is found to be very small. Higher order curvature and suction effects are found to increase deposition. The results are compared with results using a Lagrangian tracking method of the same flow configuration. When compared, the deposition rates are of the same order of magnitude, but the analytical results show a larger variation for different particle sizes. The results are also compared with numerical results, using the angle averaged convective-diffusion equation. The agreement between numerical and analytical results is good.

Convective diffusion to a drop under arbitrary conditions of absorption. Diffusion boundary layer approximation

1980 ◽  
Vol 14 (6) ◽  
pp. 862-866 ◽  
Author(s):  
Yu. P. Gupalo ◽  
A. D. Polyanin ◽  
Yu. S. Ryazantsev ◽  
Yu. A. Sergeev
Keyword(s):  
Boundary Layer ◽  
Convective Diffusion ◽  
Diffusion Boundary Layer ◽  
Boundary Layer Approximation ◽  
Diffusion Boundary

Simultaneous flow of ions and heat to a plate electrode in the region of natural convection

1979 ◽  
Vol 44 (6) ◽  
pp. 1857-1868 ◽  
Author(s):  
Petr Novák ◽  
Ivo Roušar
Keyword(s):  
Heat Transfer ◽  
Boundary Layer ◽  
Natural Convection ◽  
Convective Diffusion ◽  
Navier Stokes ◽  
Exponential Polynomials ◽  
Plate Electrode ◽  
Transfer Equations ◽  
Boundary Layer Region ◽  
Layer Region

The Sherwood criterion was calculated for a flow of ions to the surface of a plate electrode during natural convection by solving the Navier-Stokes, convective diffusion, and convective heat transfer equations. The solution for the boundary layer region was performed by the collocation method using orthogonal exponential polynomials. Values of the Sh criterion were obtained for Sc ##m <500; 2 000>, Pr ##m <5; 20>, and GrT/GrM ##m <0.2; 8.0>. A comparison with literature data revealed the best agreement with average errors of +2.0 and -1.4%. Another equation with an error of only +0.5% is proposed.

DIFFUSION BOUNDARY LAYER TRANSPORT IN GRACILARIA CONFERTA(RHODOPHYTA)1

1995 ◽  
Vol 31 (5) ◽  
pp. 768-773 ◽  
Author(s):  
Yael Gonen ◽  
Eitan Kimmel ◽  
Michael Friedlander
Keyword(s):  
Boundary Layer ◽  
Diffusion Boundary Layer ◽  
Diffusion Boundary ◽  
Gracilaria Conferta

Numerical Modeling of Diffusion Boundary Layer in Strip Casting Process of Carbon Steel

2000 ◽  
Author(s):  
A. V. Kuznetsov
Keyword(s):  
Boundary Layer ◽  
Carbon Steel ◽  
Continuous Casting ◽  
Casting Process ◽  
Strip Casting ◽  
Diffusion Boundary Layer ◽  
Valuable Insight ◽  
Continuous Casting Process ◽  
Diffusion Boundary ◽  
Flat Steel

Abstract This paper is aimed at the investigation of the diffusion boundary layer near the cooled casting surface encountered in the horizontal continuous casting process of carbon steel. The strip casting process is a relatively new continuous casting process. This process makes it possible to produce high-quality flat steel products directly, without using hot rolling. This explains why this process is very attractive for industry. Extensive numerical simulations under equilibrium and nonequilibrium assumptions provide valuable insight into the physics of diffusion boundary layer.

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