Lewis Number
An Analytical Model for Flame Propagation through Moist Lycopodium Particles with Non-unity Lewis Number
... or Lewis number causes to increase in moisture evaporation and devolatization rates, and consequently both flame temperature and burning velocity ...
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Advanced numerical methods for the simulation of alloy solidification with high Lewis number
... In order to model and simulate dendritic crystal growth in alloys, the phase-field method is one of the most popular and powerful techniques. However, the nature of phase- field models leads to coupled systems of highly ...
6
Effect of Lewis Number on Double diffusive Natural Convection in a Triangular Cavity
... cell trends to increase. But due to the increase of Lewis number from 1.0 to 10.0, there are only two circular cells inside enclosure and the strength of flow increases. The left cell rotates ...
5
Linear stability of planar premixed flames: reactive Navier-Stokes equations with finite activation energy and arbitrary Lewis number
... For Lewis numbers sufficiently close to or above unity (l close to or above zero), the flame is only unstable to relatively small wavenumbers (large ...the Lewis numbers decreases below unity (l negative), ...
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Boundary layer flow of nanofluid over an exponentially stretching surface
... reduction of the boundary layer. The temperature field θ for different values of Prandtle number Pr, Brownian parameter Nb, Lewis number Le and thermophoresis parameter Nt is shown in Figures 3, 4, 5 ...
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Double stratification effects on heat and mass transfer in unsteady MHD nanofluid flow over a flat surface
... Nusselt number (rate of heat transfer), and the local Sherwood number with variation in the values of thermophysical parameters embed- ded in the ...Hartmann number Ha leads to an increase in the ...
16
Soret and Dufour Effects on Magneto- Nanofluid Flow Over a Stretching Sheet in the Presence of Thermal Radiation and Heat Generation/Absorption
... influence number, the Prandtl number, Lewis number, the Brownian motion parameter, thermophoresis parameter, radiation parameter, heat source/sink parameter, the soret number and the ...
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Cooperating Thermosolutal Convection in Fluid Annular Cylindrical Cavities with Low and Moderate Radii Ratio
... A numerical study has been conducted on the phenomenon of double diffusive natural convection occurring in a concentric horizontal annulus filled with a binary fluid with Prandtl number Pr = 0.7. The temperature ...
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Numerical Investigation of Double- Diffusive Mixed Convective Flow in a Lid-Driven Enclosure Filled with Al2O3-Water Nanofluid
... nonlinear governing equations are discretized using the control volume method and hybrid scheme. The equations are solved using SIMPLER algorithm. The results are displayed in the form of streamlines, isotherms, and ...
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Characterization and Modeling of Premixed Turbulent n-Heptane Flames in the Thin Reaction Zone Regime
... Similarly, Fig. 6.1(b) shows the same plot but for the non-unity Lewis number flame. For both flames, the turbulent reaction zone is locally of the same thickness as that of a one-dimensional flat flame (as ...
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Influence of Stefan blowing on nanofluid flow submerged in microorganisms with leading edge accretion or ablation
... conventional Lewis number (Le) on nano-particle and microorganism species diffusion ...greater Lewis number and strong wall suction present. Increasing Lewis number results in a ...
35
Vol 9, No 1 (2018)
... Nusselt number on nanoparticle concentration Rayleigh number ...as Lewis number increases the Nu decreases indicating there is retardation on heat ...Vadasz number enhance the heat ...
12
Consideration on the Flow Velocity in the Experimental Analysis of the Flame Displacement Speed Using DNS Data of Turbulent Premixed Flames with Different Lewis Numbers
... The flame displacement speed is one of the major characteristics in turbulent premixed flames. The flame displacement speed is experimentally obtained from the displacement normal to the flame surface, while it is ...
11
Double diffusive reaction-convection in viscous fluid layer
... of chemical reaction by obtaining an analytical expression for onset of stationary and oscillatory convection. Pritchard and Richardson [13] stud- ied an exhaustive case of the effect of temperature dependent solubility ...
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Direct Numerical Simulations of Reaction Fronts Propagation under Quasi Periodic Gravitational Modulation
... The aim of this paper is to study the influence of quasi- periodic gravitational modulation on convective instability of reaction fronts in porous media. The model contains reaction diffusion equations coupled with the ...
5
Impact of thermal radiation on electrical MHD flow of nanofluid over nonlinear stretching sheet with variable thickness
... The systems of highly nonlinear ordinary differential Eqs. (11)–(13) with the respective boundary conditions (14) are solved numerically using Keller box method [37] for the veloc- ity, temperature and concentration ...
11
Thermodiffusion effects on magneto-nanofluid flow over a stretching sheet
... influence number, the Prandtl number, Lewis number, the Brownian motion parameter, thermophoresis parameter, the modified Dufour parameter and the Dufour-solutal Lewis number on ...
13
MATHEMATICAL STUDY OF NON-NEWTONIAN NANOFLUID TRANSPORT PHENOMENA FROM AN ISOTHERMAL SPHERE
... (Nt), Lewis number (Le) and Prandtl number (Pr) on velocity, temperature and nano-particle concentration distributions are illustrated graphically and interpreted at ...
13
An adaptive, fully implicit multigrid phase-field model for the quantitative simulation of non-isothermal binary alloy solidification
... The results of calculating the selection parameter, σ*, are shown in Fig. 9, for both the LGK and LKT basis. As in [20] we find that as Pt → 0, σ* approaches a value of approximately 0.07, which is consistent with it ...
31
Vol 8, No 6 (2017)
... Flow instability and turbulence are far less widespread in viscoelastic fluids than in Newtonian fluids because of the high viscosity of the polymeric fluids. It has long been a common belief that oscillatory convection ...
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