Results 21 to 30 of about 252,548 (168)

A Priori Assessment of Algebraic Flame Surface Density Models in the Context of Large Eddy Simulation for Nonunity Lewis Number Flames in the Thin Reaction Zones Regime

Journal of Combustion, 2012
The performance of algebraic flame surface density (FSD) models has been assessed for flames with nonunity Lewis number (Le) in the thin reaction zones regime, using a direct numerical simulation (DNS) database of freely propagating turbulent premixed ...
Mohit Katragadda, Nilanjan Chakraborty, R. S. Cant   +2 more
doaj   +1 more source

Numerical modelling of double-diffusive natural convection within an arc shaped enclosure filled with a porous medium [PDF]

Journal of Heat and Mass Transfer Research, 2014
Numerical study of double-diffusive natural convective heat transfer in a curved cavity filledwith a porous medium has been carried out in the current study. Polar system has beenselected as coordinate system.
Ariyan Zare Ghadi, Ali Haghighi Asl, Mohammad Sadegh Valipour   +2 more
doaj   +1 more source

Response characteristics of methane–air and propane–air premixed flames to sinusoidal oscillations in equivalence ratio (Effects of Lewis number and preferential diffusion)

Journal of Thermal Science and Technology
Flames propagate in mixture flows with inhomogeneous concentration distributions in practical combustors, such as gasoline direct-injection engines and gas turbine engines. Clarifying the effect of fuel-type differences on the response characteristics of
Yosuke SUENAGA, Hideki YANAOKA, Shohei SEO, Komei NIWATA   +3 more
doaj   +1 more source

Lewis-Sumner syndrome: subacute bilateral lesion of brachial plexus

Neurologijos seminarai, 2018
Lewis-Sumner syndrome (LSS) is a multifocal acquired demyelinating sensory and motor neuropathy considered as an asymmetric variant of chronic inflammatory demyelinating polyneuropathy affecting the upper and/or lower extremities.
R. Bunevičiūtė , R. Masaitienė , A. Klimašauskienė   +2 more
doaj   +1 more source

Significance of melting heat transfer in bio-convective thixotropic nanofluid

Ain Shams Engineering Journal, 2022
This work studies bio-convective thixotropic nanomaterial flow due to stretchable surface. Importances of bio-convection and melting impact are examined. Nanofluid significance through thermophoresis and Brownian diffusion is considered.
T. Hayat, Inayatullah, Sohail A. Khan, M. Waqar Ahmad, A. Alsaedi   +4 more
doaj   +1 more source

Quantitative phase-field modeling of solidification at high Lewis number [PDF]

Physical Review E, 2009
A phase-field model of nonisothermal solidification in dilute binary alloys is used to study the variation of growth velocity, dendrite tip radius, and radius selection parameter as a function of Lewis number at fixed undercooling. By the application of advanced numerical techniques, we have been able to extend the analysis to Lewis numbers of order 10
Rosam, J, Jimack, PK, Mullis, AM
openaire   +3 more sources

The effects of unburned-gas temperature on intrinsic instability of premixed flames at high Lewis numbers under the adiabatic and non-adiabatic conditions

Mechanical Engineering Journal, 2017
We treated numerically premixed flames at high Lewis numbers under the adiabatic and non-adiabatic conditions to elucidate the effects of unburned-gas temperature on intrinsic instability.
Thwe Thwe Aung, Toshiyuki KATSUMI, Satoshi KADOWAKI   +2 more
doaj   +1 more source

Lewis' law revisited: the role of anisotropy in size–topology correlations

New Journal of Physics, 2014
Since F T Lewis' pioneering work in the 1920s, a linear correlation between the average in-plane area of domains in a two-dimensional (2D) cellular structure and the number of neighbors of the domains has been empirically proposed, with many supporting ...
Sangwoo Kim, Muyun Cai, Sascha Hilgenfeldt   +2 more
doaj   +1 more source

Thermo diffusion and diffusion thermo impacts on bioconvection Walter-B nanomaterial involving gyrotactic microorganisms

Alexandria Engineering Journal, 2021
Here magnetohydrodynamic (MHD) bioconvection Walter-B nanofluid flow due to stretched sheet is considered. Significance of motile gyrotactic microorganisms and melting phenomena are scrutinized.
T. Hayat, Inayatullah, A. Alsaedi, B. Ahmad   +3 more
doaj   +1 more source

Experimental and theoretical study of catalytic and radiative characteristics of anti-oxidation and anti-erosion coatings for high-speed aircraft

Учёные записки Казанского университета: Серия Физико-математические науки
The catalytic activity coefficient and emissivity of the surface of thin-walled oxidation- and erosion-resistant coatings for high-speed aircraft were determined experimentally and theoretically.
O. V. Tushavina
doaj   +1 more source