期刊
ENERGIES
卷 16, 期 14, 页码 -出版社
MDPI
DOI: 10.3390/en16145291
关键词
coal particle; drop impact; maximum spreading; PIV; slurry; velocity field
The effect of coal hydrophilic particles in water-glycerol drops on the maximum spreading diameter along a hydrophobic solid surface was experimentally studied. The analysis of internal flow velocity by Particle Image Velocimetry (PIV) revealed the interrelated influence of Weber numbers and the concentration of coal particles on the maximum absolute velocity of internal flows. At We = 120, the spreading of particle-laden drops was mainly determined by the dynamics of the deformable Taylor rim. An increase in Weber numbers resulted in more noticeable differences in convection velocities in spreading drops. The presence of coal particles caused a general tendency to reduce drop spreading.
The effect of coal hydrophilic particles in water-glycerol drops on the maximum diameter of spreading along a hydrophobic solid surface is experimentally studied by analyzing the velocity of internal flows by Particle Image Velocimetry (PIV). The grinding fineness of coal particles was 45-80 & mu;m and 120-140 & mu;m. Their concentration was 0.06 wt.% and 1 wt.%. The impact of particle-laden drops on a solid surface occurred at Weber numbers (We) from 30 to 120. It revealed the interrelated influence of We and the concentration of coal particles on changes in the maximum absolute velocity of internal flows in a drop within the kinetic and spreading phases of the drop-wall impact. It is explored the behavior of internal convective flows in the longitudinal section of a drop parallel to the plane of the solid wall. The kinetic energy of the translational motion of coal particles in a spreading drop compensates for the energy expended by the drop on sliding friction along the wall. At We = 120, the inertia-driven spreading of the particle-laden drop is mainly determined by the dynamics of the deformable Taylor rim. An increase in We contributes to more noticeable differences in the convection velocities in spreading drops. When the drop spreading diameter rises at the maximum velocity of internal flows, a growth of the maximum spreading diameter occurs. The presence of coal particles causes a general tendency to reduce drop spreading.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据