Numerical Simulation of Density-Driven Non-Newtonian Fluid Flow

IF 1.5 4区 工程技术 Q3 MECHANICS Journal of Mechanics Pub Date : 2023-07-21 DOI:10.1093/jom/ufad017
Yu-Shan Li, Ching-Yao Chen
{"title":"Numerical Simulation of Density-Driven Non-Newtonian Fluid Flow","authors":"Yu-Shan Li, Ching-Yao Chen","doi":"10.1093/jom/ufad017","DOIUrl":null,"url":null,"abstract":"\n Density-driven flow is numerically studied. The sinking fluid is set as a power-law non-Newtonian fluid with a higher density than the environmental fluid. During the simulation process, saturation concentration is fixed on the upper boundary, thus downward plumes are formed because of gravitational instability. The dissolution flux undergoes a series of changes, from the initially diffusion-dominated regime to the convection-dominated regime due to the appearance of finger structures, and then to the transition of finger structures merging into larger plumes. Finally, it enters the shut-down regime as the plumes start to reach the impermeable bottom boundary. In the process of plume sinking, different fluid properties have an important impact on the downward velocity, shape of plumes, and the dissolution flux of the flow field. The tip velocity of the plumes is slowed until high-concentration fluid is supplied to further push the plumes downward. For the shear-thinning fluid ambient fluid, this phenomenon is even more drastic. However, for shear-thickening fluid, this phenomenon is almost not observed. In addition, unlike the condition of a Newtonian fluid, protoplumes on the original interface appear at the early stage. Prominent protoplumes have developed between the primary plumes in non-Newtonian fluids throughout the entire process.","PeriodicalId":50136,"journal":{"name":"Journal of Mechanics","volume":"170 ","pages":""},"PeriodicalIF":1.5000,"publicationDate":"2023-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Mechanics","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1093/jom/ufad017","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"MECHANICS","Score":null,"Total":0}
引用次数: 0

Abstract

Density-driven flow is numerically studied. The sinking fluid is set as a power-law non-Newtonian fluid with a higher density than the environmental fluid. During the simulation process, saturation concentration is fixed on the upper boundary, thus downward plumes are formed because of gravitational instability. The dissolution flux undergoes a series of changes, from the initially diffusion-dominated regime to the convection-dominated regime due to the appearance of finger structures, and then to the transition of finger structures merging into larger plumes. Finally, it enters the shut-down regime as the plumes start to reach the impermeable bottom boundary. In the process of plume sinking, different fluid properties have an important impact on the downward velocity, shape of plumes, and the dissolution flux of the flow field. The tip velocity of the plumes is slowed until high-concentration fluid is supplied to further push the plumes downward. For the shear-thinning fluid ambient fluid, this phenomenon is even more drastic. However, for shear-thickening fluid, this phenomenon is almost not observed. In addition, unlike the condition of a Newtonian fluid, protoplumes on the original interface appear at the early stage. Prominent protoplumes have developed between the primary plumes in non-Newtonian fluids throughout the entire process.
查看原文
分享 分享
微信好友 朋友圈 QQ好友 复制链接
本刊更多论文
密度驱动非牛顿流体流动的数值模拟
对密度驱动流动进行了数值研究。下沉流体被设定为幂律非牛顿流体,其密度高于环境流体。在模拟过程中,饱和浓度固定在上边界,因此由于重力不稳定而形成向下的羽流。由于指状结构的出现,溶解通量经历了一系列变化,从最初的扩散主导状态到对流主导状态,再到指状结构合并为更大的羽流。最后,当羽流开始到达不可渗透的底部边界时,它进入关闭状态。在羽流下沉过程中,不同的流体性质对羽流的向下速度、羽流形状和流场的溶解通量有重要影响。羽流的尖端速度减慢,直到提供高浓度流体以进一步向下推动羽流。对于剪切稀化流体环境流体,这种现象甚至更加剧烈。然而,对于剪切增稠流体,几乎没有观察到这种现象。此外,与牛顿流体的情况不同,原始界面上的原羽流出现在早期阶段。在整个过程中,在非牛顿流体的初级羽流之间形成了突出的原羽流。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 去求助
来源期刊
Journal of Mechanics
Journal of Mechanics 物理-力学
CiteScore
3.20
自引率
11.80%
发文量
20
审稿时长
6 months
期刊介绍: The objective of the Journal of Mechanics is to provide an international forum to foster exchange of ideas among mechanics communities in different parts of world. The Journal of Mechanics publishes original research in all fields of theoretical and applied mechanics. The Journal especially welcomes papers that are related to recent technological advances. The contributions, which may be analytical, experimental or numerical, should be of significance to the progress of mechanics. Papers which are merely illustrations of established principles and procedures will generally not be accepted. Reports that are of technical interest are published as short articles. Review articles are published only by invitation.
期刊最新文献
Structural damage identification using an optimization technique based on generalized flexibility matrix Solder die attach lifetime characterization of SOT-227 power MOSFET module in a three-phase inverter under power cycling Data-driven numerical simulation with extended Kalman filtering and long short-term memory networks for highway traffic flow prediction Nanoparticles separation by different conditions at asymmetric flow field- flow fractionation Mechanical Instability of Heavy Column with Rotational Spring
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
已复制链接
已复制链接
快去分享给好友吧!
我知道了
×
扫码分享
扫码分享
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1