标题： 微通道内的热毛细管驱动流体流动 显示英文标题

标题： Thermocapillary-driven fluid flow within microchannels

摘要： 表面张力梯度会引发马兰戈尼流，这可以用于流体传输。 在微米尺度上，这些由表面驱动的流动可能比由压力驱动的流动更为显著。 通过在微流控通道的壁面上引入流体-流体界面，我们利用表面张力梯度来驱动整体流体流动。 这些梯度是通过热能特别诱导的，利用流体-流体界面的温度依赖性来产生热毛细流。 在本报告中，我们提供了可生物相容的、能够通过太阳能照射供能的热毛细微通道的设计概念。 使用每厘米摄氏度量级的温度梯度，我们实现了每秒毫米量级的流体速度。 根据实验观察、流体动力学模型和数值模拟，我们发现流体速度与提供的温度梯度成线性比例，从而能够在微通道内完全控制流体流动。 显示英文摘要

摘要： Surface tension gradients induce Marangoni flow, which may be exploited for fluid transport. At the micrometer scale, these surface-driven flows can be more significant than those driven by pressure. By introducing fluid-fluid interfaces on the walls of microfluidic channels, we use surface tension gradients to drive bulk fluid flows. The gradients are specifically induced through thermal energy, exploiting the temperature dependence of a fluid-fluid interface to generate thermocapillary flow. In this report, we provide the design concept for a biocompatible, thermocapillary microchannel capable of being powered by solar irradiation. Using temperature gradients on the order of degrees Celsius per centimeter, we achieve fluid velocities on the order of millimeters per second. Following experimental observations, fluid dynamic models, and numerical simulation, we find that the fluid velocity is linearly proportional to the provided temperature gradient, enabling full control of the fluid flow within the microchannels.