Results 241 to 250 of about 134,990 (292)

Entropy generation minimization of a MHD (magnetohydrodynamic) flow in a microchannel

Energy, 2010
The dissipative processes that arise in a microchannel flow subjected to electromagnetic interactions, as occurs in a MHD (magnetohydrodynamic) micropump, are analyzed. The entropy generation rate is used as a tool for the assessment of the intrinsic irreversibilities present in the microchannel owing to viscous friction, heat flow and electric ...
Guillermo Ibáñez, Sergio Cuevas
openaire   +1 more source

Entropy generation minimization and binary chemical reaction with Arrhenius activation energy in MHD radiative flow of nanomaterial

Journal of Molecular Liquids, 2018
Our aim here is to investigate the MHD radiative nanomaterial flow of Casson fluid towards a stretched surface. Heat transport mechanism is examined through thermal radiation and heat source/sink.
Muhammad Ijaz Khan, Sumaira Qayyum, T. Hayat, M. Waqas, Muhammad Imran Khan, A. Alsaedi   +5 more
semanticscholar   +1 more source

ENTROPY GENERATION MINIMIZATION: THE METHOD AND ITS APPLICATIONS

Proceedings of the International Thermal Science Seminar Bled. Volume 1, 2000
This lecture outlines the basis for the entropy generation minimization method, and a series of key applications in power generation, refrigeration, and energy conservation The lecture begins with a review of the conceptof irreversibility, entropy generation, or exergy destruction.
openaire   +1 more source

Entropy generation minimization on CIC (Cable-In-Conduit) superconductor design

Cryogenics, 1998
Abstract The concept of EGM (Entropy Generation Minimization) is applied to the design of an optimum CIC (Cable-In-Conduit) superconducting cable for large scale superconducting magnets, which is cooled by supercritical helium flow inside a conduit at cryogenic temperature.
openaire   +1 more source

Entropy Generation Minimization analysis of oscillating-flow regenerators

International Journal of Heat and Mass Transfer, 2015
Abstract The thermodynamic efficiencies of regenerative cooling cycles are directly linked to the heat transfer effectiveness and thermal losses in the regenerator. This paper proposes a performance analysis for regenerators based on the Entropy Generation Minimization (EGM) theory.
Paulo V. Trevizoli, Jader R. Barbosa
openaire   +1 more source

Eyring-Powell nanofluid flow with nonlinear mixed convection: Entropy generation minimization

Comput. Methods Programs Biomed., 2019
BACKGROUND Entropy is the amount of energy which is lost during any irreversible process. Here our main focus is that how can we reduce this energy loss to enhance the capability of our system. Blood is an example of Eyring-Powell fluid.
A. Alsaedi, T. Hayat, Sumaira Qayyum, Rabiya Yaqoob   +3 more
semanticscholar   +1 more source

Entropy generation minimization in turbulent mixed convection flows

International Communications in Heat and Mass Transfer, 2007
Abstract This paper reports the results of a numerical investigation of turbulent mixed convection from a symmetrically heated vertical channel, bathed by a steady upward flow of cold air. The computations have been performed using FLUENT 6.2 by employing the k–e model for turbulence with enhanced wall treatment.
C. Balaji, M. Hölling, H. Herwig
openaire   +1 more source

Sobol sensitivity analysis and multi-objective optimization of manifold microchannel heat sink considering entropy generation minimization

International Journal of Heat and Mass Transfer, 2023
Zehui Wang, Mingxuan Li, Fengsheng Ren, Binjian Ma, Huizhu Yang, Yong Zhu   +5 more
semanticscholar   +1 more source

Entropy and Generalized Cost Minimization Models at the Macro Level

1992
In Chapter 2 various links between entropy (and gravity) theory and spatial interaction behaviour have been discussed and interpreted. It turned out that the entropy concept was compatible with a behavioural interpretation of spatial interaction. In the present chapter an attempt will be made to start off from the entropy philosophy itself and to find ...
Peter Nijkamp, Aura Reggiani
openaire   +1 more source

Minimizing the generation of entropy: which sequence of reservoirs to choose?

European Journal of Physics, 2009
This letter deals with irreversible processes described by abrupt changes in temperature or in pressure, in which the system is placed into contact with a finite number N of heat or work reservoirs, respectively. Two previous papers have shown that when N goes to infinity the entropy generation goes to zero, i.e. the process becomes reversible. Here we
Ferreira, J. M., Anacleto, Joaquim
openaire   +2 more sources