Results 91 to 100 of about 67,930 (246)

Mean Temperature Profiles in Turbulent Thermal Convection

, 2017
To predict the mean temperature profiles in turbulent thermal convection, the thermal boundary layer (BL) equation including the effects of fluctuations has to be solved. In Shishkina et al., Phys. Rev. Lett.
Ching, Emily S. C., Emran, Mohammad S., Horn, Susanne, Shishkina, Olga   +3 more
core   +1 more source

Experimental Factors and Techniques for Pool Boiling Heat Transfer Enhancement: A Critical Review

Heat Transfer, EarlyView.
ABSTRACT This review presents a comprehensive assessment of active strategies for enhancing pool boiling heat transfer, with a focus on techniques that do not rely solely on the boiling surface modification. It examines a broad range of methodologies including fluid additives, external fields, mechanical interventions, and thermal‐geometric tuning that
José E. Pereira, R. R. Souza, A. S. Moita   +2 more
wiley   +1 more source

Impact of an effective Prandtl number model on the flow of nanofluids past an oblique stagnation point on a convective surface. [PDF]

Heliyon, 2023
Mahmood Z, Eldin SM, Soliman AF, Assiri TA, Khan U, Mahmoud SR.   +5 more
europepmc   +1 more source

Stability of MRI turbulent Accretion Disks

, 2010
Based on the characteristics of the magnetorotational instability (MRI) and the MRI-driven turbulence, we construct a steady model for a geometrically thin disk using "non-standard" $\alpha$-prescription.
Balbus, Balbus, Fukue, Goldreich, Guan, Hartmann, Hiroyuki R. Takahashi, Johnson, Johnson, Kato, Kozlowski, Lin, Masada, Mineshige, Novikov, Paczynski, Papaloizou, Pessah, Pessah, Pringle, Sano, Sano, Shakura, Simon, Simon, Smak, Spitzer, Velikov, Youhei Masada   +28 more
core   +1 more source

Static and Dynamic Analysis of Porous Gas Bearings Lubricated With Air, Refrigerant R‐134a, Helium and Hydrogen

Lubrication Science, EarlyView.
ABSTRACT Porous gas bearings (PGBs) enable high‐speed, oil‐free operation in modern rotating machinery. This study develops a coupled thermo‐hydrodynamic (THD) model for a cylindrical porous gas bearing lubricated with four working fluids—air, R‐134a, helium and hydrogen.
S. Bechiri, B. Bouchehit, B. Bou‐Saïd
wiley   +1 more source

Numerical modeling of thermophoresis and Brownian with heat transfer in shear-rate-dependent fluid: The finite element simulations

Case Studies in Thermal Engineering
This article discusses the simultaneous influence of thermophoresis, Brownian motion, and the dispersion of nanoparticles on thermal enhancement in non-Newtonian fluid existing over a surface stretching with non-uniform velocity.
M. Nawaz, Basit Ali, SayerObaid Alharbi, A.S. Shflot, M.Y. Malik, Abdelatif Salmi   +5 more
doaj   +1 more source

Magnetorotational turbulence transports angular momentum in stratified disks with low magnetic Prandtl number but magnetic Reynolds number above a critical value

, 2011
The magnetorotational instability (MRI) may dominate outward transport of angular momentum in accretion disks, allowing material to fall onto the central object.
Balbus, Brandenburg, Cho, Davis, Fleming, Hubbard, Jeffrey S. Oishi, Johansen, Johansen, Mordecai-Mark Mac Low, Oishi, Pessah, Pessah, Sano, Schekochihin, Schekochihin, Shakura, Shi, Simon, Vishniac, Vishniac, Vishniac   +21 more
core   +1 more source

The Combined Effects of Variable Viscosity and Thermal Conductivity of An Unsteady Casson Fluid Flow Along a Vertical Porous Channel With Convective Cooling Walls, Using the Bivariate Spectral Local Linearization Method

Mathematical Methods in the Applied Sciences, EarlyView.
ABSTRACT This study examines the combined impact of different thermal conductivity and viscosity on unsteady non‐Newtonian Casson fluid flow of incompressible, electrical conductivity in a porous vertical channel with convective cooling walls, uniform magnetic field, and constant pressure gradient.
A. S. Adeyemo, Precious Sibanda, S. P. Goqo   +2 more
wiley   +1 more source

Thermal Planar and Radial Free Jets for An Ostwald‐de Waele Fluid With Shear‐Rate Dependent Thermal Diffusivity

Mathematical Methods in the Applied Sciences, EarlyView.
ABSTRACT The planar and radial thermal free jets for forced convection of a non‐Newtonian power‐law fluid are investigated. The thermal diffusivity is dependent on the shear‐rate and is not a constant. The flow in planar and radial thermal free jets is governed by the momentum, continuity and energy balance equations. In the stream‐function formulation,
Avnish Bhowan Magan, Rehana Naz
wiley   +1 more source

Supercriticality to subcriticality in dynamo transitions

, 2013
Evidence from numerical simulations suggest that the nature of dynamo transition changes from supercritical to subcritical as the magnetic Prandtl number is decreased.
Bhattacharjee J. K., Mahendra K. Verma, Moffatt H. K., Rakesh K. Yadav, Strogatz S. H.   +4 more
core   +1 more source