Marangoni Flow In subject area: Engineering Marangoni flow occurs when mass transfer is driven by a surface tension gradient that is induced by the variation of evaporation flux across the surface of the droplet. From: Robotic Systems and Autonomous Platforms, 2019 About this pageSet alert Discover...
The cresults show that a stagnation point, where the surface flow cchanges its direction, exists at the boundary between the cmicro-region and the macro-region. Furthermore, the effects of cMarangoni stresses on the flow in the droplet have been cobserved and analyzed....
Marangoni flow in a sessile droplet: (A) thermal Marangoni convection: effect of evaporation; (B) electric Marangoni convection: effect of the electric field; left: recirculation rolls caused by the presence of two actuated electrodes; right: typical electric Marangoni flow in a droplet on an ...
(e.g., droplet/particle rotors and MOF rotors) is infeasible or cumbersome26,27,28,29. Our hydrogel rotor can be refueled and the refueling process is divided into two steps: the first is the removal of water in the rotor (the original fuel molecules in hydrogel chains have been replaced...
The time evolution of the droplet counts for each DO are presented in Fig. 2D–G. Here, the time of the first droplet breakup was used as a reference, and the times to later breakups are depicted. CP was associated with faster breakup than FP as expected due to the higher flow rate ...
The swimming speed is determined from the balance of Marangoni forces (both direct forces from surface tension gradients and from Marangoni flow forces) and drag forces. We can address the problem of spontaneous symmetry breaking and predict the swim- mer's speed in a stationary state. This ...
In the present paper the behavior of a single artificial microswimmer is addressed, namely an active droplet moving by Marangoni flow. We provide a numeric... L Stricker - 《Journal of Computational Physics》 被引量: 2发表: 2017年 Skimming and steering of a non-tethered miniature robot on th...
Flow visualization is employed in the pendant droplet mode to understand the Marangoni induced internal circulation. The droplets of surfactant solutions are found to exhibit enhanced residence time compared to the case of non-surfactant drops. The levitation time is a function of the surfactant ...
Marangoni-induced surface flow may result in changes of interfacial area under conditions where the depth of penetration of surface flow is comparable in magnitude to the thickness of the liquid layer. Starting from considerations of mass transfer out of and into volumes of variable capacity, ...
Hereafter, some examples dealing with conditions corresponding to the micro scale experimentation are considered (height of the liquid columns of a few millimeters). For the sake of clarity, first, the case of a stable and steady Marangoni flow is examined, in order to study the effect of grav...