Results 21 to 30 of about 54,636 (287)

Entropy Generation Analysis of Laminar Flows of Water-Based Nanofluids in Horizontal Minitubes under Constant Heat Flux Conditions

open access: yesEntropy, 2018
During the last decade, second law analysis via entropy generation has become important in terms of entropy generation minimization (EGM), thermal engineering system design, irreversibility, and energy saving.
Mehrdad Karimzadehkhouei   +5 more
doaj   +1 more source

Entropy Generation via Ohmic Heating and Hall Current in Peristaltically-Flowing Carreau Fluid

open access: yesEntropy, 2019
The core objective of the present study is to examine entropy generation minimization via Hall current and Ohmic heating. Carreau fluid considerations interpret the unavailability of systems’ thermal energy (for mechanical work).
Saima Noreen, Asif Abbas, Abid Hussanan
doaj   +1 more source

Generalized entropy minimization under full marginal constraints

open access: yes, 2020
We consider the problem of minimizing a generalized relative entropy, with respect to a reference diffusion law, over the set of path-measures with fully prescribed marginal distributions. When dealing with the actual relative entropy, problems of this kind have appeared in the stochastic mechanics literature, and minimizers go under the name of Nelson
Backhoff-Veraguas, Julio   +1 more
openaire   +3 more sources

A mathematical model for entropy generation in a Powell-Eyring nanofluid flow in a porous channel

open access: yesHeliyon, 2019
The continuous generation of entropy leads to exergy destruction which reduces the performance of a physical system. Hence, entropy minimization becomes necessary.
Hammed Abiodun Ogunseye   +1 more
doaj   +1 more source

Heat Transfer Improvement in an Open Cubic Cavity using a Hybrid Nanofluid [PDF]

open access: yesJournal of Applied and Computational Mechanics, 2021
Numerical simulation of convection heat transfer and entropy generation in an open cubic cavity filled with a hybrid nanofluid is carried out. This configuration is heated uniformly by a constant volumetric heat source qv.
Saliha Bellout, Rachid Bessaïh
doaj   +1 more source

Entropy Generation During the Interaction of Thermal Radiation with a Surface

open access: yesEntropy, 2012
The entropy calculation for radiation fluxes is reviewed and applied to simple radiation-surface interactions. A plate interacting with radiation from a hot object in the zenith of the hemisphere surrounded by a colder atmosphere is analyzed in detail ...
Stephan Kabelac, Rainer Conrad
doaj   +1 more source

Maximum power, ecological function and efficiency of an irreversible Carnot cycle. A cost and effectiveness optimization [PDF]

open access: yes, 2007
In this work we include, for the Carnot cycle, irreversibilities of linear finite rate of heat transferences between the heat engine and its reservoirs, heat leak between the reservoirs and internal dissipations of the working fluid. A first optimization
Aragon-Gonzalez, G   +3 more
core   +3 more sources

Thermodynamic optimization of fluid flow over an isothermal moving plate

open access: yesAlexandria Engineering Journal, 2013
In this paper, entropy generation minimization (EGM) was employed in order to achieve a thermodynamic optimization of fluid flow and heat transfer over a flat plate.
A. Malvandi, F. Hedayati, D.D. Ganji
doaj   +1 more source

Sparse Signal Recovery via Generalized Entropy Functions Minimization

open access: yesIEEE Transactions on Signal Processing, 2019
Compressive sensing relies on the sparse prior imposed on the signal of interest to solve the ill-posed recovery problem in an under-determined linear system. The objective function used to enforce the sparse prior information should be both effective and easily optimizable.
Shuai Huang, Trac D. Tran
openaire   +2 more sources

Entropy Minimization for Generalized Newtonian Fluid Flow between Converging and Diverging Channels

open access: yesMicromachines, 2022
The foremost focus of this article was to investigate the entropy generation in hydromagnetic flow of generalized Newtonian Carreau nanofluid through a converging and diverging channel.
Sohail Rehman   +4 more
doaj   +1 more source

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