论文标题
“通过溶质源在水体中诱导的溶索毛细血管流量”
"Solutocapillary Marangoni flow induced in waterbody by solute source"
论文作者
论文摘要
本文的目的是通过实验和分析研究水体中诱导的溶质毛细血管流,由于其表面上存在溶质源以及由这种溶质和气体在水体上和附近溶解在水体上的溶质和气体引起的混合。根据分析解决方案,诱导的流量类似于双重流动,其流动是指圆锥区域内的,其顶点在源位于源位于源的源区域,并且在锥形区域外部流动远离源。负源的半圆锥角从$ \ sim $ 60度增加,源强度的增加,而施密特的数字达到了大于80度的值。当锥角度大时,流出仅限于薄环边界层区域。这些分析结果与我们通过PIV(粒子图像速率法)和PLIF(平面激光诱导的荧光)技术获得的实验数据一致。由于表面的溶质梯度会产生驱动流动的力,因此,当溶质扩散系数降低时,流动变得更强,并且持续更长,因为将溶质梯度保持更长的时间和距离。在实验中,当溶质诱导的表面张力梯度驱动流动时,流动向水体变化,表面流量与由于温度梯度而在表面上存在的表面张力梯度相当。
The aim of this paper is to experimentally and analytically study the solutocapillary flow induced in a waterbody due to the presence of a solute source on its surface and the mixing induced by this flow of the solutes and gases dissolved at and near the surface into the waterbody. According to the analytic solution, the induced flow is analogous to a doublet flow in the sense that the flow is directed towards the source within a conical region with its vertex at the source, and outside the conical region the flow moves away from the source. The half cone angle for a negative source increases from $\sim$60 degrees with increasing source strength and Schmidt number reaching values greater than 80 degrees. When the cone angle is large, the outflow is restricted to a thin annular boundary layer region. These analytic results are in agreement with our experimental data obtained by the PIV (Particle Image Velocimetry) and PLIF (planar laser-induced fluorescence) techniques. As the solute gradient at the surface gives rise to the force that drives the flow, when the solute diffusion coefficient is reduced the flow becomes stronger and persists longer because the solute gradient is maintained for a longer time and distance. In experiments, the flow changes direction into the waterbody and the surface flow stops when the solute induced surface tension gradient driving the flow becomes comparable to the surface tension gradients that exist on the surface due to temperature gradients.