Natural Convection and Entropy Generation in a Porous Enclosure Filled with Non-Newtonian Nanofluid

纳米流体 努塞尔数 材料科学 自然对流 瑞利数 传热 非牛顿流体 机械 热力学 达西数 牛顿流体 雷诺数 物理 湍流
作者
Swastik Acharya,Sukanta Kumar Dash
出处
期刊:Journal of Thermophysics and Heat Transfer [American Institute of Aeronautics and Astronautics]
卷期号:35 (3): 438-458 被引量:11
标识
DOI:10.2514/1.t6126
摘要

In the present work, the analysis of natural convection and entropy generation in a square porous cavity, having either a flat or a wavy vertical wall, filled with a non-Newtonian nanofluid is reported. The effect of Rayleigh number , non-Newtonian power-law index (0.6–1.4), Darcy number (0.0001–0.01), Hartmann number (0–90), and volume fraction of CuO nanoparticles (0–0.12) on heat transfer characteristics has been thoroughly examined. It is found that the average surface Nusselt number for an undulated wall is less than that of a plane wall. for all the cases increases with and and decreases with . The mixing of the nanoparticles with both Newtonian and non-Newtonian fluids enhances the heat transfer only for of 0.01 and less than 30 for all . When is low at 0.0001, the addition of nanoparticles to a fluid enhances the heat transfer for all the cases except of at less than 1. The entropy generation is significant near the vertical wall because of the higher temperature and velocity gradient. The magnitude of is found to be very less as compared with and . , , and increase with an increase in for all cases; however, for a of 60 or 90, there exists an optimum for for a ranging from 0.0005 to 0.001. Finally, the correlation for the average surface as a function of the pertinent input parameters has been proposed for both Newtonian and non-Newtonian fluids, which can be referred in the academics and the industrial world.

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
善良的非笑完成签到,获得积分10
2秒前
2秒前
小二郎应助jiabaoyu采纳,获得10
2秒前
无奈秋荷发布了新的文献求助10
3秒前
4秒前
黄哈哈发布了新的文献求助10
5秒前
多多发布了新的文献求助10
5秒前
7秒前
李健的小迷弟应助Brian采纳,获得10
7秒前
7秒前
7秒前
liujian完成签到,获得积分10
8秒前
8秒前
脑洞疼应助wl301采纳,获得20
9秒前
9秒前
早安发布了新的文献求助10
9秒前
顾矜应助小岚花采纳,获得10
9秒前
10秒前
11秒前
11秒前
242588发布了新的文献求助10
11秒前
深情安青应助感性的梦竹采纳,获得10
12秒前
jiabaoyu发布了新的文献求助10
14秒前
Lc应助谷大喵唔采纳,获得10
14秒前
ff发布了新的文献求助10
15秒前
15秒前
15秒前
15秒前
Zarc完成签到,获得积分10
16秒前
无奈秋荷完成签到,获得积分10
17秒前
元谷雪发布了新的文献求助10
17秒前
19秒前
拼搏的酸奶完成签到,获得积分10
20秒前
Brian发布了新的文献求助10
20秒前
21秒前
21秒前
咖啡蓝图发布了新的文献求助10
21秒前
21秒前
23秒前
zhao完成签到,获得积分10
23秒前
高分求助中
A new approach to the extrapolation of accelerated life test data 1000
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
‘Unruly’ Children: Historical Fieldnotes and Learning Morality in a Taiwan Village (New Departures in Anthropology) 400
Indomethacinのヒトにおける経皮吸収 400
Phylogenetic study of the order Polydesmida (Myriapoda: Diplopoda) 370
基于可调谐半导体激光吸收光谱技术泄漏气体检测系统的研究 350
Robot-supported joining of reinforcement textiles with one-sided sewing heads 320
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 3988827
求助须知:如何正确求助?哪些是违规求助? 3531197
关于积分的说明 11252739
捐赠科研通 3269830
什么是DOI,文献DOI怎么找? 1804815
邀请新用户注册赠送积分活动 881915
科研通“疑难数据库(出版商)”最低求助积分说明 809028