Magnetorheological fluids subjected to non-uniform magnetic fields: experimental characterization

磁流变液 材料科学 磁场 机械 流变学 粘度 流量(数学) 机械工程 复合材料 物理 工程类 量子力学
作者
Michal Kubík,Janusz Gołdasz,Ondřej Macháček,Zbyněk Strecker,Bogdan Sapiński
出处
期刊:Smart Materials and Structures [IOP Publishing]
卷期号:32 (3): 035007-035007 被引量:8
标识
DOI:10.1088/1361-665x/acb473
摘要

Abstract Magnetorheological (MR) fluids are suspensions of fine, low-coercivity, high-magnetizable particles in a continuous liquid phase. When subjected to magnetic field, the material exhibits a rapid change in the apparent viscosity of several orders of magnitude. This unique capability has been successfully exploited in automotive semi-active suspensions systems or systems for manufacturing high quality optics. In a majority of the existing systems, the rheology of MR fluids is controlled by an external uniform field oriented perpendicularly to the fluid flow direction. In general, it is an inherent feature of MR systems operating in flow, shear or squeeze modes, respectively. There is an experimental evidence that the behavior of MR fluids in the so-called pinch-mode (in which the fluid is subjected to non-uniform magnetic field distributions) clearly stands out against the remaining three operating modes. With the predecessors, the flow through the channel occurs once a pressure across it exceeds the field-dependent threshold pressure. For comparison, in pinch mode valves the magnetic flux energizes mostly the layers of the materials near the channel walls. The outcome is a change in the channel’s effective diameter achieved solely via material means without changing its geometry. To study the fluid’s unique behaviour in the pinch mode, the authors designed a prototype valve assembly and examined several fluid formulations of various particle concentration levels across a wide range of external (velocity, magnetic field density) stimuli in an organized effort to further comprehend the phenomenon. The obtained data indicate that the magnitude of the particular effect does not only depend on the magnitudes of the magnetic stimuli but also on the particle concentration; the smaller the concentration of particles the more pronounced the pinch mode like behavior is. In general, the authors believe that the study may provide guidelines as to the selection of fluid formulations for developing novel valveless actuators utilizing MR fluids operating in pinch mode.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
大幅提高文件上传限制,最高150M (2024-4-1)

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
李健应助小七采纳,获得10
刚刚
松柏完成签到 ,获得积分10
1秒前
12完成签到,获得积分20
1秒前
wwl完成签到,获得积分10
1秒前
苗苗完成签到,获得积分10
2秒前
东单的单车完成签到,获得积分10
2秒前
zxl完成签到,获得积分10
3秒前
daydayup完成签到 ,获得积分10
6秒前
憨憨的小于完成签到,获得积分10
6秒前
zxl发布了新的文献求助10
6秒前
踏水追风完成签到,获得积分10
8秒前
8秒前
细心宛凝完成签到,获得积分10
10秒前
Lareina发布了新的文献求助10
13秒前
遇安发布了新的文献求助10
14秒前
飞向火星完成签到,获得积分10
14秒前
前程似锦完成签到 ,获得积分10
14秒前
皮皮虾完成签到,获得积分10
15秒前
冷傲雨寒完成签到,获得积分10
16秒前
MoonFlows应助尊敬灵松采纳,获得10
16秒前
Jayden完成签到 ,获得积分10
16秒前
小白完成签到 ,获得积分10
16秒前
销户完成签到 ,获得积分10
18秒前
早日暴富完成签到 ,获得积分10
18秒前
东方琉璃完成签到,获得积分10
19秒前
jxas完成签到,获得积分10
19秒前
魏俏红完成签到,获得积分10
19秒前
小鑫鑫1027完成签到,获得积分10
19秒前
114555完成签到,获得积分10
20秒前
喜欢皮卡丘的贾同学完成签到,获得积分10
21秒前
眼睛大的电脑完成签到,获得积分10
22秒前
bio-tang完成签到,获得积分10
22秒前
Timothy完成签到 ,获得积分10
23秒前
leiiiiiiii完成签到,获得积分10
24秒前
peiyy完成签到,获得积分10
25秒前
亓墨完成签到 ,获得积分10
25秒前
稳如老狗完成签到,获得积分10
27秒前
孙鹏完成签到,获得积分10
28秒前
wendydqw完成签到 ,获得积分10
29秒前
Reader01完成签到 ,获得积分10
30秒前
高分求助中
The Young builders of New china : the visit of the delegation of the WFDY to the Chinese People's Republic 1000
юрские динозавры восточного забайкалья 800
English Wealden Fossils 700
Chen Hansheng: China’s Last Romantic Revolutionary 500
宽禁带半导体紫外光电探测器 388
Case Research: The Case Writing Process 300
Global Geological Record of Lake Basins 300
热门求助领域 (近24小时)
化学 医学 生物 材料科学 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 基因 遗传学 催化作用 物理化学 免疫学 量子力学 细胞生物学
热门帖子
关注 科研通微信公众号,转发送积分 3142849
求助须知:如何正确求助?哪些是违规求助? 2793786
关于积分的说明 7807358
捐赠科研通 2450052
什么是DOI,文献DOI怎么找? 1303590
科研通“疑难数据库(出版商)”最低求助积分说明 627016
版权声明 601350