| 查看: 1450 | 回復(fù): 57 | |||
| 【有獎(jiǎng)交流】積極回復(fù)本帖子,參與交流,就有機(jī)會(huì)分得作者 gentle_boy 的 76 個(gè)金幣 ,回帖就立即獲得 1 個(gè)金幣,每人有 1 次機(jī)會(huì) | |||
[交流]
法國波爾多大學(xué) LOMA實(shí)驗(yàn)室 公派讀博-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. |
» 搶金幣啦!回帖就可以得到:
+5/450
+1/84
+1/76
+1/72
+2/54
+1/52
+1/45
+1/38
+1/34
+1/22
+1/17
+2/12
+1/12
+1/8
+1/8
+1/7
+1/6
+1/4
+1/2
+1/2
版主 (文學(xué)泰斗)

| 最具人氣熱帖推薦 [查看全部] | 作者 | 回/看 | 最后發(fā)表 | |
|---|---|---|---|---|
|
[考研] 化學(xué)工程專碩324分,一志愿中國礦業(yè)大學(xué)求調(diào)劑 +6 | 耿耿1314 2026-04-01 | 6/300 |
|
|---|---|---|---|---|
|
[考研] 288求調(diào)劑 一志愿哈工大 材料與化工 +28 | 洛神哥哥 2026-03-31 | 28/1400 |
|
|
[考研] 295材料工程專碩求調(diào)劑 +19 | 1428151015 2026-03-27 | 19/950 |
|
|
[考研] 296求調(diào)劑 +4 | 汪!?! 2026-03-31 | 7/350 |
|
|
[考研] 材料科學(xué)與工程調(diào)劑 +16 | 深V宿舍吧 2026-03-30 | 17/850 |
|
|
[考研] 337求調(diào)劑 +9 | 《樹》 2026-03-29 | 9/450 |
|
|
[考研] 283求調(diào)劑 +9 | A child 2026-03-28 | 9/450 |
|
|
[論文投稿]
chinese chemical letters英文版投稿求助
120+4
|
Yishengeryi 2026-03-30 | 5/250 |
|
|
[考研] 一志愿中農(nóng)0710生物學(xué),微生物方向總分338求調(diào)劑 +3 | 柒xxxx. 2026-03-26 | 3/150 |
|
|
[考研] 314求調(diào)劑 +6 | 1xiaojun23 2026-03-31 | 6/300 |
|
|
[考研] 求0861交通運(yùn)輸專碩or材料專碩調(diào)劑 +4 | 勒布朗@ 2026-03-31 | 4/200 |
|
|
[考研] 339求調(diào)劑 +5 | zjjkt 2026-03-31 | 5/250 |
|
|
[考研] 一志愿西交大080500材料學(xué)碩349 +6 | jqx1258 2026-03-31 | 7/350 |
|
|
[考研] 已決定調(diào)劑院校 +8 | JKSOIID 2026-03-26 | 8/400 |
|
|
[考研] 286求調(diào)劑 +6 | Faune 2026-03-30 | 6/300 |
|
|
[考研] 一志愿食品科學(xué)與工程083200求調(diào)劑 +4 | XQTJZ 2026-03-30 | 4/200 |
|
|
[考研] 085701環(huán)境工程求調(diào)劑 +11 | 多久上課 2026-03-27 | 12/600 |
|
|
[考研] 本科新能源科學(xué)與工程,一志愿華理能動(dòng)285求調(diào)劑 +7 | AZMK 2026-03-28 | 11/550 |
|
|
[考研] 081200-314 +3 | LILIQQ 2026-03-27 | 4/200 |
|
|
[考研] 265求調(diào)劑11408 +3 | 劉小鹿lu 2026-03-27 | 3/150 |
|