نتایج جستجو برای: bejan number

تعداد نتایج: 1168369  

2016
A Jafarimoghaddam S Aberoumand

In the present research, a brief study on the impact of DBD (Dielectric Barrier Discharge) plasma actuator on the entropy generation rate in a channel flow is presented. The work has been continued in the certain inlet Reynolds number of about 670. Moreover, the problem is assumed to be a two dimensional DBD plasma based channel flow with the assumption of the incompressible flow. Since, the di...

Journal: :Thermal Science 2021

We consider a heat transfer augmentation problem to minimize the entropy generation by assuming boundary-layer flow of nanofluid over moving wavy surface. The demonstrates great potential in enhancing process due its high thermal conductivity. famous Tiwari and Das model has been used present article. Two types water based nanofluids containing Cu Fe3O4 nanoparticles are considered. Moreover, s...

Journal: :Entropy 2016
Tasawar Hayat Sadaf Nawaz Ahmed Alsaedi Maimona Rafiq

This article examines entropy generation in the peristaltic transport of nanofluid in a channel with flexible walls. Single walled carbon nanotubes (SWCNT) and multiple walled carbon nanotubes (MWCNT) with water as base fluid are utilized in this study. Mixed convection is also considered in the present analysis. Viscous dissipation effect is present. Moreover, slip conditions are encountered f...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه فردوسی مشهد - دانشکده کشاورزی 1390

abstract previous researches have shown success of growth hormones usage on flower production increase, pod and prevention of abscission of them in some of the pulses. two tests were done, in order to find out the effects of growth hormones to on flower production increase, pod and chick pea yield composites in farmer conditions (2010-11) and green house conditions as factorial on the proje...

A. Aghaei G.A. Sheikhzadeh H.R. Ehteram M. Hajiahmadi

Natural convection heat transfer has many applications in different fields of industry; such as cooling industries, electronic transformer devices and ventilation equipment; due to simple process, economic advantage, low noise and renewed retrieval. Recently, heat transfer of nanofluids have been considered because of higher thermal conductivity coefficient compared with those of ordinary fluid...

Journal: :SN applied sciences 2021

Abstract The current investigation is concerned with heat transfer and entropy generation analysis in a horizontal channel brimming porous medium the existence of aligned magnetic field, viscous joules dissipation temperature gradient source. boundary conditions are treated as constant values for velocity at lower upper walls. An explicit solution governing equations has been attained closed sy...

Journal: :Journal of Thermal Engineering 2022

This works presents a second law analysis on heat exchanger tube configurated as circular smoot (CST), elliptical smooth (EST) and twisted (ETT) with different aspect ratios pitch lengths. The ETTs were ratio (AR) of 1.5 2.0 twist length (PL) 50, 100 200 mm. hydraulic diameter was kept constant for all cases, since the results are influenced by change in diameter. CFD analyzes run to perform co...

Journal: :alexandria engineering journal 2023

This study addresses CuO - TiO 2 /CMC-water hybridnano-liquid in the influence of mixed convection flow and thermal radiative past a stretchable vertical surface. Cross nanofluid containing Titanium dioxide ( ) , Copper Oxide C u O are scattered base fluid kind CMC water. In addition, theirreversibility analysis is also examined current problem. A suitable transformation utilized to transmute m...

Journal: :Mathematical Problems in Engineering 2022

This analysis examines the flow of Sutterby nanofluid having bioconvection due to a stretching sheet and heated convective boundary condition. The heat sink/source was imposed in terms energy equation. entropy minimization is also considered. Through appropriate transformation system nonlinear PDE’s setting, existing problem has altered into ODEs then numerically utilized via bvp4c method. nume...

Journal: :Journal of Thermal Engineering 2021

In the 21th century, renewable energy has to play very important role in socio-economic and industrial development. This paper evaluates exergy- analysis, which is based on second law of thermodynamics. The triangular solar heater developed determine heat transfer rate, thermal efficiency, exergy efficiency Bejan number. addition, we have examined effects entropy generation with respect radiati...

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