| 查看: 1579 | 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 | |||
[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
梦想
已经有8人回复
-
有多少人是今天查系统知道结果的？
已经有19人回复
-
面上合作单位盖章
已经有9人回复
-
面上函评意见出来了，像什么等级？
已经有17人回复
-
为什么国自然不能直接公布
已经有5人回复
-
学科评审组评审是指会评吗？
已经有4人回复
-
为什么资助数各大高校都创新高，自己申请怎么就这么难
已经有14人回复
-
小白求助 投论文要求的highlights应该如何写
已经有4人回复
-
麻烦专家们看看评委们的意见（F口面上）
已经有12人回复
-
怎么看青基中了没有啊
已经有6人回复
3楼2021-01-20 22:17:58
11楼2021-01-21 19:49:49
12楼2021-01-23 10:58:27
48楼2021-01-27 15:40:32
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
2021-01-20 23:53
回复
gentle_boy(金币+1): 谢谢参与
2021-01-21 00:53
回复
gentle_boy(金币+1): 谢谢参与
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
2021-01-21 09:08
回复
gentle_boy(金币+1): 谢谢参与
nono20098楼
2021-01-21 10:16
回复
gentle_boy(金币+1): 谢谢参与
·
2021-01-21 11:12
回复
BiotageAB10楼
2021-01-21 17:02
回复
gentle_boy(金币+1): 谢谢参与
slytjiaofei13楼
2021-01-23 15:11
回复
shenrenren14楼
2021-01-24 08:37
回复
gentle_boy(金币+1): 谢谢参与
slytjiaofei15楼
2021-01-24 11:39
回复
gter_wang16楼
2021-01-24 17:27
回复
gentle_boy(金币+1): 谢谢参与
guanlianwu17楼
2021-01-26 11:05
回复
gentle_boy(金币+1): 谢谢参与
yaqianye18楼
2021-01-26 15:20
回复
gentle_boy(金币+1): 谢谢参与
。 发自小木虫Android客户端
蓉蓉番薯19楼
2021-01-26 15:20
回复
gentle_boy(金币+1): 谢谢参与
。 发自小木虫Android客户端
likecitywo20楼
2021-01-26 15:20
回复
gentle_boy(金币+1): 谢谢参与
。 发自小木虫Android客户端
icanspll21楼
2021-01-26 15:20
回复
gentle_boy(金币+1): 谢谢参与
。 发自小木虫Android客户端
zzhello22楼
2021-01-26 15:21
回复
gentle_boy(金币+1): 谢谢参与
。 发自小木虫Android客户端
howtoge23楼
2021-01-26 15:21
回复
gentle_boy(金币+1): 谢谢参与
。 发自小木虫Android客户端
gofast11224楼
2021-01-26 15:21
回复
gentle_boy(金币+1): 谢谢参与
。 发自小木虫Android客户端
Haibo_25楼
2021-01-26 15:22
回复
gentle_boy(金币+1): 谢谢参与
。 发自小木虫Android客户端
shehuifei26楼
2021-01-26 15:24
回复
gentle_boy(金币+1): 谢谢参与
。 发自小木虫Android客户端
蓉蓉番薯27楼
2021-01-26 23:13
回复
yaqianye28楼
2021-01-26 23:16
回复
icanspll29楼
2021-01-26 23:16
回复
likecitywo30楼
2021-01-26 23:16
回复
gofast11231楼
2021-01-26 23:18
回复
zzhello32楼
2021-01-26 23:19
回复
shehuifei33楼
2021-01-26 23:19
回复
howtoge34楼
2021-01-26 23:19
回复
Haibo_35楼
2021-01-26 23:19
回复
syhorchid36楼
2021-01-27 00:35
回复
gentle_boy(金币+1): 谢谢参与
zslzqd37楼
2021-01-27 08:52
回复
gentle_boy(金币+1): 谢谢参与
slytjiaofei38楼
2021-01-27 10:15
回复
蓉蓉番薯39楼
2021-01-27 14:12
回复
likecitywo40楼
2021-01-27 14:15
回复
zzhello41楼
2021-01-27 14:15
回复
gofast11242楼
2021-01-27 14:17
回复
icanspll43楼
2021-01-27 14:17
回复
howtoge44楼
2021-01-27 14:17
回复
yaqianye45楼
2021-01-27 14:18
回复
Haibo_46楼
2021-01-27 14:20
回复
shehuifei47楼
2021-01-27 14:23
回复
bjdxyxy49楼
2021-01-27 15:45
回复
蓉蓉番薯50楼
2021-01-27 22:10
回复
20