نتایج جستجو برای: entropy generation

تعداد نتایج: 418190  

Journal: :Journal of Chemical Physics 2021

We propose a method of neural evolution structures (NESs) combining artificial networks (ANNs) and evolutionary algorithms (EAs) to generate High Entropy Alloys (HEAs) structures. Our inverse design approach is based on pair distribution functions atomic properties allows one train model smaller unit cells then larger cell. With speed-up factor approximately 1000 with respect the SQSs, NESs dra...

In this study, the finite volume method and the SIMPLER algorithm is employed to investigate forced convection and entropy generation of Cu-water nanofluid in a parallel plate microchannel. There are four obstacles through the microchannel, and the slip velocity and temperature jump boundary conditions are considered in the governing equations to increase the accuracy of modeling. The study is ...

2005
Eiyad Abu-Nada

The present research investigates second law analysis of laminar flow over a backward facing step (BFS). Entropy generation due to separation, reattachment, recirculation and heat transfer is studied numerically. Local entropy generation distributions were obtained by solving momentum, energy, and entropy generation equations. The effect of dimensionless temperature difference number (τ) and Br...

Journal: :Entropy 2011
Mounir Bouabid Mourad Magherbi Nejib Hidouri Ammar Ben Brahim

Natural convection in an inclined rectangular cavity filled with air is numerically investigated. The cavity is heated and cooled along the active walls whereas the two other walls of the cavity are adiabatic. Entropy generation due to heat transfer and fluid friction has been determined in transient state for laminar natural convection by solving numerically: the continuity, momentum and energ...

Journal: :Entropy 2015
Ching-Chang Cho Her-Terng Yau Ching-Huang Chiu Kuo-Ching Chiu

This current work studies the heat transfer performance and entropy generation of natural convection in a nanofluid-filled U-shaped cavity. The flow behavior and heat transfer performance in the cavity are governed using the continuity equation, momentum equations, energy equation and Boussinesq approximation, and are solved numerically using the finite-volume method and SIMPLE C algorithm. The...

Journal: :Advances in Mechanical Engineering 2015

Darabi, M., Dibaee Bonab, M. H., Hejazi, S. R., Janipour Bidsardareh, V., Mohammadiun, H., Mohammadiun, M.,

: In this research, dimensionless temperature and entropy generation for the steady state flow in the stagnation point of incompressible nanofluid impinging on an infinite cylinder have been investigated. The impinging free stream is steady with a constant strain rate  k. Similarity solution of the Navier-Stokes equations and energy equation is derived in this problem. A reduction of these equa...

Journal: :Entropy 2014
Donald M. McEligot Edmond J. Walsh

In an earlier paper in Entropy [1] we hypothesized that the entropy generation rate is the driving force for boundary layer transition from laminar to turbulent flow. Subsequently, with our colleagues we have examined the prediction of entropy generation during such transitions [2,3]. We found that reasonable predictions for engineering purposes could be obtained for flows with negligible strea...

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