Experimental and numerical study of interaction between particle loaded fluid and a rough wall with micropillars
Experimental and numerical study of interaction between particle loaded fluid and a rough wall with micropillars
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颗粒负载流体与带有微柱的粗糙壁之间相互作用的实验和数值研究
DOI：
10.1016/j.triboint.2014.10.009
复制
发表时间：
2015
影响因子：
6.2
通讯作者：
C. Brücker
中科院分区：
文献类型：
--
作者：
V. Mikulich;B. Nassauer;M. Kuna;C. Brücker
本文对具有特定微结构的粗糙表面上的剪切流中浆液的行为进行了实验和数值研究。建立了一种新的环形剪切装置，该装置包含一个光学透明的测试室。它的底壁包含微悬臂力传感器阵列，模拟由硅晶片中的微柱深蚀刻产生的限定表面粗糙度。显示了在严重变形期间悬浮液与结构化表面的相互作用的视觉观察结果。观测包括液相运动，即，液相和固体颗粒之间的相互作用、分离颗粒的运动以及它们与微柱的相互作用。观察到粒子的旋转运动和平移速度的突然变化，引起相互碰撞和各种类型的簇结构的连续形成和破裂。除了实验的过程中进行了模拟与离散元（DEM）模拟。实验中发现的许多特性都被模拟再现。此外，可以量化过程的物理量，如接触力或速度，这有助于我们开发更详细的浆料磨损行为模型。
Experimental and numerical studies of the behavior of a slurry in a shear flow over a rough surface with a defined micro-structure are presented. A new ring shear device was built which contains an optically transparent test chamber. Its bottom wall contains arrays of micro-cantilever force sensors simulating a defined surface roughness created by deep-etching of micro-pillars in a silicon wafer. The results of visual observation of the interaction of the suspension with the structured surface during severe deformation are shown. Observations comprise the liquid phase motion, i.e., the interaction between the liquid phase and solid particles, the movement of separate particles and their interactions with the micro-pillars. Abrupt changes in rotational motion and translational velocity of particles are observed that induce mutual collisions and successive formation and break-up of cluster structures of various types. In addition to the experiments the process was simulated with discrete element (DEM) simulations. Many characteristics found in the experiments are reproduced by the simulations. Furthermore the physical quantities of the process like contact forces or velocities can be quantified which helps us to develop more detailed models of the abrasive behavior of slurries.
用于颗粒材料的环形剪切单元
DOI：
--
发表时间：
1968
期刊：
影响因子：
--
作者：
J. Carr;D. M. Walker
通讯作者：
D. M. Walker
影响因子：
2.4
作者：
Nassauer, Benjamin;Liedke, Thomas;Kuna, Meinhard
通讯作者：
Kuna, Meinhard