Results 21 to 30 of about 63,343 (262)

The Differential Entropy Generation Rate as a Unified Measure for Both the Stability and Efficiency of an Axial Compressor

open access: yesMachines, 2023
Stability and efficiency are the two most important performance indicators of highly loaded aviation axial compressors; however, they often cannot be achieved simultaneously.
Jingyuan Ma, Feng Lin
doaj   +1 more source

Teaching Fluid Mechanics and Thermodynamics Simultaneously through Pipeline Flow Experiments

open access: yesFluids, 2019
Entropy and entropy generation are abstract and illusive concepts for undergraduate students. In general, students find it difficult to visualize entropy generation in real (irreversible) processes, especially at a mechanistic level.
Rajinder Pal
doaj   +1 more source

Entropies for complex systems: generalized-generalized entropies

open access: yesAIP Conference Proceedings, 2007
CTNEXT 07, no ...
Stefan Thurner   +6 more
openaire   +2 more sources

Entropy Generation during Turbulent Flow of Zirconia-water and Other Nanofluids in a Square Cross Section Tube with a Constant Heat Flux

open access: yesEntropy, 2014
The entropy generation based on the second law of thermodynamics is investigated for turbulent forced convection flow of ZrO2-water nanofluid through a square pipe with constant wall heat flux.
Hooman Yarmand   +6 more
doaj   +1 more source

Effect of non-uniform temperature distribution on entropy generation and enthalpy for the laminar developing pipe flow of a high Prandtl number fluid [PDF]

open access: yesChemical Review and Letters, 2019
In this article, Entropy generation and enthalpy are investigated on the pipe wall in developed laminar flow for 7 cases. Variation of entropy generation and enthalpy are shown along the radius.
Reza Kakulvand
doaj   +1 more source

Experimental and support vector machine predictions of entropy generations and exergy efficiency of Fe3O4–SiO2/Water hybrid nanofluid in a plate heat exchanger

open access: yesHeliyon, 2023
Several experiments of Fe3O4–SiO2/water hybrid nanofluids with volumetric concentrations ranging from 0.2 % to 1.0 % circulating in the cold-side of a plate heat exchanger at flow rates ranging from 0.05 kg/s to 0.1166 kg/s are performed.
A.M. Alklaibi   +2 more
doaj   +1 more source

Performance analysis of micro-fin tubes compared to smooth tubes as a heat transfer enhancement technique for flow condensation

open access: yesEnergy Nexus, 2022
Heat transfer enhancement techniques are accompanied by pressure drop amplification, detrimentally affecting their performance; entropy generation analysis is an effective approach to assess heat transfer enhancement along with resulting pressure drop ...
Shahriyar Ghazanfari Holagh   +4 more
doaj   +1 more source

Optimal Design of Nanoparticle Enhanced Phan-Thien–Tanner Flow of a Viscoelastic Fluid in a Microchannel

open access: yesEntropy, 2018
The excellent thermal characteristics of nanoparticles have increased their application in the field of heat transfer. In this paper, a thermophysical and geometrical parameter study is performed to minimize the total entropy generation of the ...
Mohammad Yaghoub Abdollahzadeh Jamalabadi
doaj   +1 more source

Performance optimization of centrifugal pump based on particle swarm optimization and entropy generation theory

open access: yesFrontiers in Energy Research, 2023
Centrifugal pumps are frequently utilized in general machinery, but they have issues with low efficiency, unstable operation, and high-power consumption in actual engineering, making performance improvements necessary.
Handong Qi   +9 more
doaj   +1 more source

Entropy Generation Due to Laminar Incompressible Forced Convection Flow Through Parallel-Plates Microchannel

open access: yesEntropy, 2004
: The entropy generation due to steady laminar forced convection fluid flow through parallel plates microchannel is investigated numerically. The effect of Knudsen, Reynolds, Prandtl, Eckert numbers and the nondimensional temperature difference on ...
Mohammad Al-Nimr   +2 more
doaj   +1 more source

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