نتایج جستجو برای: bejan number

تعداد نتایج: 1168369  

Journal: :Fluids 2021

The fluid flow through inclined plates has several applications in magneto-aerodynamics, materials processing and magnetohydrodynamic propulsion thermo-fluid dynamics. Inspired by these applications, the rate of entropy production a bio-convective Williamson nanoliquid over an convectively heated stretchy plate with influence thermal radiation, porous chemical reaction been deliberated this pap...

Journal: :Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 2021

In this research, the entropy production of conjugate heat transfer in a tilted porous cavity respect to source and solid walls locations has been studied numerically. Three different cases with finite thickness are considered present study. For both one two, vertical thickness, while horizontal is for case three. left sidewall exposed source, whereas rest wall as well right adiabatic. The uppe...

Journal: :alexandria engineering journal 2021

Herein, laminar convective heat transfer from two horizontally arranged spheres has been evaluated by using numerical models inside water-based fluids incorporated with alumina (Al2O3), copper oxide (CuO), and (Cu) nanoparticles. The problem was simulated for different Rayleigh numbers ranging 103 to 106 various volume fractions including 2, 4, 6, 8%. evaluation process included the perspective...

Journal: :Energy Sources, Part A: Recovery, Utilization, And Environmental Effects 2023

This numerical study investigates the improvement of transient heat transfer in a plain tube using hybrid nanofluids consisting solid particles and twisted tapes with elliptical cuts, under non-uniform flux conditions. The analysis includes calculation Bejan number entropy production. Different working fluids, including water, CuO/water nanofluid, nanofluid 2% volume concentration Al2O3-Cu/wate...

Journal: :J. Economic Theory 2002
Costas Azariadis Vincenzo Galasso

1 A partial draft of this paper was circulated under the title ‘‘Discretionary Policy and Economic Volatility’’ in October 1995. We thank Robert Becker, Camelia Bejan, Marco Celentani, V. V. Chari, Russell Cooper, John Driffill, David Levine, Rody Manuelli, Albert Marcet, Ken West, and Bill Zame for helpful comments, without implicating them in the results. Earlier versions of the paper were pr...

Journal: :Entropy 2010
A. Alper Ozalp

Fluid flow, heat transfer and entropy generation characteristics of micro-pipes are investigated computationally by considering the simultaneous effects of pipe diameter, wall heat flux and Reynolds number in detail. Variable fluid property continuity, Navier-Stokes and energy equations are numerically handled for wide ranges of pipe diameter (d = 0.50–1.00 mm), wall heat flux ( ' ' q = 1000–20...

2012
S. Jerald Jeba Kumar M. Madheswaran

The structure of retinal vessels is a prominent feature, that reveals information on the state of disease that are reflected in the form of measurable abnormalities in thickness and colour. Vascular structures of retina, for implementation of clinical diabetic retinopathy decision making system is presented in this paper. Retinal Vascular structure is with thin blood vessel, whose accuracy is h...

Journal: :Computers & mathematics with applications 2021

The transport of heat and mass from the surface a cylinder coated with catalyst subject to an impinging flow Casson rheological fluid is investigated. features circumferentially non-uniform transpiration embedded inside homogeneous porous medium. non-equilibrium thermodynamics problem, including Soret Dufour effects local thermal in medium, are considered. Through introduction similarity variab...

Journal: :Journal of Thermal Analysis and Calorimetry 2022

Abstract This work investigates heat transfer and entropy generation of a turbulent flow an Al 2 O 3 –Cu/water hybrid nanofluid in plain tube (PT) with classical (TPT) elliptical‑cut twisted tape (TECT) inserts. The pressure drop are investigated numerically at Re (7000–15,000), mass concentration (1–4%), the inlet temperature fluid (300 K). Further, total Bejan number examined = 7000 4%. obtai...

Journal: :Case Studies in Thermal Engineering 2022

The current study addresses the features of entropy generation and thermal flows regarding magnetized hybrid nanofluid in presence a cylinder closed hexagonal domain. cavity comprises two heated horizontal walls, are insulated while other walls cold. whole system has been modeled as coupled non-linear partial differential equations. Also, normalized governing equation by utilizing proper pair v...

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