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首页> 外文期刊>International Journal of Heat and Mass Transfer >Experimental research of surfaced nanoparticle thermal transport in a porous medium
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Experimental research of surfaced nanoparticle thermal transport in a porous medium

机译：多孔介质中表面纳米颗粒热传递的实验研究

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摘要

Experimental research on thermally induced nanocolloid transport in a porous environment is presented. Addition of excess surfactant to a colloid with dispersed phase made of surfaced nanoparticles results in a decrease of effective Soret coefficient in a porous environment. It is shown that with sufficient amounts of surfactant added, this effect extends to a reversal of nanoparticle thermophoretic transport direction, and that the effect shows a tendency of saturation. A mechanism of thermal transport that involves slip velocity of surfactant molecules appearing near pore walls is evaluated as a possible cause of the decrease of Soret coefficient. Effects of temperature on particle thermophoresis are analyzed, revealing a decrease of Soret coefficient with the increase of temperature. In order to better understand surfactant motion in the porous environment, a series of experiments characterizing thermoosmotic motion of a mixture of surfactant diluted in pure carrier fluid through a porous layer is performed.
机译：提出了在多孔环境中热诱导纳米胶体传输的实验研究。将过量的表面活性剂添加到具有由表面纳米颗粒制成的分散相的胶体中会导致多孔环境中有效Soret系数的降低。结果表明，添加足量的表面活性剂后，这种作用扩展到了纳米粒子热泳运输方向的逆转，并且这种作用表现出饱和的趋势。涉及到出现在孔壁附近的表面活性剂分子的滑移速度的热传输机制被评估为Soret系数降低的可能原因。分析了温度对颗粒热泳的影响，发现随着温度的升高，Soret系数降低。为了更好地理解多孔环境中表面活性剂的运动，进行了一系列表征通过多孔层稀释在纯载液中的表面活性剂混合物的热渗运动的实验。

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