Results 21 to 30 of about 50,610 (294)

Entropy characterisation of overstressed capacitors for lifetime prediction [PDF]

open access: yes, 2016
We propose a method to monitor the ageing and damage of capacitors based on their irreversible entropy generation rate. We overstressed several electrolytic capacitors in the range of 33 µF–100 µF and monitored their entropy generation rate View the ...
Cuadras Tomàs, Àngel   +2 more
core   +2 more sources

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

Non-equilibrium thermodynamic analysis of double diffusive, nanofluid forced convection in microreactors with radiation effects [PDF]

open access: yes, 2017
This paper presents a theoretical investigation of the second law performance of double diffusive forced convection in microreactors with the inclusion of nanofluid and radiation effects.
Govone, Lilian   +3 more
core   +2 more sources

Entropy generation analysis in an evaporative air-cooled heat exchanger

open access: yesJournal of Thermal Science and Technology, 2014
In the present study, air-side entropy generation rate for an evaporative air-cooled heat exchanger has been investigated using thermodynamic second-law analysis.
Shoeib MAHJOUB   +3 more
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

Effects of temperature-dependent viscosity variation on entropy generation, heat and fluid flow through a porous-saturated duct of rectangular cross-section [PDF]

open access: yes, 2007
Effect of temperature-dependent viscosity on fully developed forced convection in a duct of rectangular cross-section occupied by a fluid-saturated porous medium is investigated analytically.
A. Bejan   +25 more
core   +2 more sources

Entropy Generation and Heat Transfer Performances of Al2O3-Water Nanofluid Transitional Flow in Rectangular Channels with Dimples and Protrusions

open access: yesEntropy, 2016
Nanofluid has great potentials in heat transfer enhancement and entropy generation decrease as an effective cooling medium. Effects of Al2O3-water nanofluid flow on entropy generation and heat transfer performance in a rectangular conventional channel ...
Yonghui Xie   +3 more
doaj   +1 more source

Constructal Optimizations of Line-to-Line Vascular Channels with Turbulent Convection Heat Transfer

open access: yesEntropy, 2022
The multi-scale line-to-line vascular channels (LVCs) widely exist in nature because of their excellent transmission characteristics. In this paper, models of LVCs with turbulent convection heat transfer are established.
Daoguang Lin   +4 more
doaj   +1 more source

A thermodynamic analysis of forced convection through porous media using pore scale modeling [PDF]

open access: yes, 2016
The flow thorough porous media is analyzed from a thermodynamic perspective, with a particular focus on the entropy generation inside the porous media, using a pore scale modeling approach.
Karimi, Nader   +3 more
core   +1 more source

Generation of entropy and forced convection of heat in a conduit partially filled with porous media- Local thermal non-equilibrium and exothermicity effects applied thermal engineering [PDF]

open access: yes, 2016
The performance of a two-dimensional, axisymmetric channel with porous inserts attached to the walls is analyzed from the perspective of the first and second laws of thermodynamics.
Karimi, Nader   +3 more
core   +1 more source

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