Results 31 to 40 of about 9,398,681 (287)

Analysis of Dual Heat Sources in a Partially Open Enclosure

open access: yesAdvances in Mechanical Engineering, 2013
In this study a partially open enclosure with two heat sources is examined to determine the Nusselt number along the hot wall. The first part of the study examines the effect of the Rayleigh number ratio on the Nusselt number. The largest Rayleigh number
M. McGarry, James G. Kohl
doaj   +1 more source

Asymptotic Nusselt numbers for internal flow in the Cassie state

open access: yesJournal of Fluid Mechanics, 2023
We consider laminar, fully developed, Poiseuille flows of liquid in the Cassie state through diabatic, parallel-plate microchannels symmetrically textured with isoflux ridges. Via matched asymptotic expansions, we develop expressions for (apparent hydrodynamic) slip lengths and Nusselt numbers. Our small parameter ( $\epsilon$
Marc Hodes   +3 more
openaire   +3 more sources

Nusselt Number and Convection Heat Transfer Coefficient for a Coaxial Heat Exchanger Using Al2O3-Water pH=5 Nanofluid [PDF]

open access: yesBulletin of the Polytechnic Institute of Jassy: Constructions, Architechture Section, 2009
Recently, a new class of fluid made up of metal nano-particles in suspension in a liquid, called nanofluid, appeared. Some numerical studies have shown that these new fluids have a higher heat transfer performance, compared with the conventional liquids.
Răzvan-Silviu Luciu   +3 more
doaj  

Localized droplet heating by hydrophobic pins: Influence of pin area and droplet size on heat transfer

open access: yesCase Studies in Thermal Engineering, 2021
Localized heating of hydrophobic droplet is considered and the effects of restricted area heating and droplet size on heat transfer are examined. Samples composing of vertical steel pins located in Perspex holders are designed and manufactured.
Abdullah Al-Sharafi   +3 more
doaj  

Transition of thermally induced flow in a square cavity using Spectral Method [PDF]

open access: yesE3S Web of Conferences
This study presents a novel mesh-free method for simulating natural convection in a square cavity filled with Newtonian fluid. The proposed algorithm integrates mesh-free Spectral methods with the Moving Collocation Element (MCOE) technique and employs a
Laasl Boutayna   +4 more
doaj   +1 more source

Optimization of Nusselt Number of Al2O3/Water Nanofluid Using Response Surface Methodology [PDF]

open access: yesIranian Journal of Chemistry & Chemical Engineering, 2019
This study has primarily aimed at the examination of the effect of flow rate, solid volume fraction and their interactions on the Nusselt number of Al2O3/water nanofluids.
Kazem Motahari, Sara Barati
doaj  

A study of flow interference and heat transfer between two-cylinders at different orientations

open access: yesJournal of Ocean Engineering and Science, 2021
A numerical investigation is carried out for the different orientations of a circular cylinder where the upstream cylinder moves with varying angles α = 0˚, 30˚, 45˚, 60˚, 90˚ with respect to the downstream cylinder in a fixed position at a gap ratio (L ...
Shardul Vikram Singh   +2 more
doaj  

"Ultimate state" of two-dimensional Rayleigh-Benard convection between free-slip fixed temperature boundaries

open access: yes, 2011
Rigorous upper limits on the vertical heat transport in two dimensional Rayleigh-Benard convection between stress-free isothermal boundaries are derived from the Boussinesq approximation of the Navier-Stokes equations. The Nusselt number Nu is bounded in
Charles R. Doering   +2 more
core   +1 more source

Stationary convection-diffusion between two co-axial cylinders [PDF]

open access: yes, 2007
In this note, we examine the high Peclet number limit of the stationary extended Graetz problem for which two families of real and imaginary eigenvalues are associated, respectively, with a downstream convective relaxation and the upstream diffusive ...
Pierre, Charles, Plouraboué, Franck
core   +2 more sources

Viscous dissipation in the heat transfer between a rotating cylinder and viscous media under forced convection

open access: yesEnergy Reports, 2021
The effects of viscous energy dissipation on the forced convection heat transfer between an unconfined rotating isothermal circular cylinder and surrounding viscous fluids are numerically investigated.
A.A. Soares, A. Rouboa
doaj  

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