| 查看: 1176 | 回复: 57 | |||
| 【有奖交流】积极回复本帖子，参与交流，就有机会分得作者 gentle_boy 的 76 个金币 ，回帖就立即获得 1 个金币，每人有 1 次机会 | |||
| 当前只显示满足指定条件的回帖，点击这里查看本话题的所有回帖 | |||
[交流]
法国波尔多大学 LOMA实验室 公派读博-2021 zhangzaicheng8911@163.com
|
|||
|
PhD thesis proposal: Electrohydrodynamic lift force Supervisor: Prof. Alois Würger Contact: alois.wurger@u-bordeaux.fr Nanoscale flows of electrolytes in confined geometry are of primary importance for active matter, energy storage devices, harvesting of waste energy, desalinization, and actuation and signal detection in micromechanical systems. Surface properties are predominant for the flow behavior and the transport properties in these systems . The coupling of the diffuse layer of counter-ions to liquid flow is at the origin of various electro-kinetic and visco-electric effects, leading to several applications ranging from microfluidics to medical analy-sis. Electro-hydrodynamic coupling has been suggested as an alternative approach to lubrica-tion, which depends on the non-equilibrium properties of the electric double layer. Indeed, advection of the diffuse layer results in an additional dynamic electric disjoining pressure, which may by far exceed the electrostatic repulsion and induce a normal force on a sphere moving along a surface. The velocity profile consists of a linear shear flow and a backward Poiseuille flow, as sketched in the figure for pure water. Since the velocity diminishes with radial distance, advection in the Poiseuille flow tends to accumulate counter-ions at the back side of the sphere, thus generating an electric field parallel to the surface and thus a lift force perpendicular to the velocity. Colloidal Probe Atomic Force Microscope (AFM) have shown their ability to probe accurately the electrostatic properties of surfaces, such as sur-face charge and potential, by measuring the equilibrium interaction force between confined Electrostatic Double Layers (EDL). They have also shown their unique power to unravel the hydrodynamics at solid/liquid interfaces. This is a collaborative project with the group of Dr Abdelhamid Maali at LOMA. The main objective is a comprehensive study, both experimentally and theoretically, of the dynamic coupling between the electric double layer to fluid flow. More precisely, we will investigate the visco-elastic and electro-dynamic response to lateral oscillations of the substrate, and in particular we will measure the lift force perpendicular to the motion. Since the force de-pends on the square value of the velocity, it comprises a static component and one oscillat-ing at twice the driving frequency. The former is obtained by measuring the time-averaged force. We will study both of these two components and their dependence versus distance, viscosity and salinity of the solutions and frequency of the lateral oscillations. |
回复此楼» 猜你喜欢
如何分离原料与产品
已经有12人回复
-
真的好想读博！
已经有18人回复
-
基金开始函评了吗？
已经有15人回复
-
环肽的合成
已经有5人回复
-
学硕专硕
已经有5人回复
-
0854－0855调剂
已经有12人回复
-
with editor 两个月了，什么原因？
已经有15人回复
-
博士白读了
已经有48人回复
-
申博求助
已经有11人回复
-
研二光催化6月底四篇二区什么水平
已经有14人回复
» 抢金币啦！回帖就可以得到:
-
交了两个本子，心里空落落的，有些茫然。
+2/912
-
国家优青团队招收2024年第二批博士研究生（有机/高分子光电材料合成）
+5/370
-
海南大学物理与光电工程学院诚聘海内外优秀人才——海聚英才，共创未来
+1/174
-
中国科学院生态环境研究中心土壤生态过程与生态重建研究组拟招收（联合培养）研究生
+1/83
-
华南理工大学微电子学院招博士研究生（2024年9月入学）
+1/76
-
东北大学Derek Lovley教授团队招聘教师和招收博士后
+1/59
-
上海离异男士寻找终身伴侣
+1/58
-
I2MTC 2024参会
+1/36
-
深圳大学材料学院骆静利院士团队诚聘博士后，综合年薪可达42万元/年，长期有效
+1/31
-
成都山地所考博
+1/29
-
专业提供SEM-EDS/NMR/FTIR/DSC/TGA/DMA/TMA/GCMS 加扣870 559 66
+1/22
-
镧系金属Eu二价态，磁距为7μB，但是最近看到一篇实验论文，单层EuC6磁距为2.5左右。
+1/17
-
上海交通大学高分子/光催化方向招聘博士后/科研助理/硕士
+1/14
-
pulverisette 7 planetary micro mill 高能球磨金属颗粒团聚和粘粉问题
+1/10
-
国企研究院急招复材工艺工程师，结构强度仿真工程师
+1/8
-
如何把极性非常小的生物质焦油溶解到水里面
+1/7
-
Applied Physics Letters这个期刊咋样呀
+1/3
-
《细胞生物学》电子教材免费提供
+1/2
-
碳纤维红外测试
+1/2
-
东方理工大学沈晓宇老师联合清华/中科大招收NLP/AI方向博士后
+1/1
+2/912
48楼2021-01-27 15:40:32
3楼2021-01-20 22:17:58
简单回复
bjdxyxy2楼
2021-01-20 21:48
回复
gentle_boy(金币+1): 谢谢参与
。 发自小木虫Android客户端
tzynew6楼
2021-01-21 01:10
回复
gentle_boy(金币+1): 谢谢参与
9 发自小木虫Android客户端
