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首页> 外文期刊>International Journal of Heat and Mass Transfer >Novel measurement of receding wicked liquid responsible for critical heat flux enhancement
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Novel measurement of receding wicked liquid responsible for critical heat flux enhancement

机译：导致临界热通量增加的后退芯吸液的新测量

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In-situ hydrodynamic behavior of wicked liquid comes from interfacial dynamics at triple contact line, resulting in receding motion around expanding dry spot. We here introduce a new and creative technique of wicking experiment adopting an external pressure source equivalent to bubble nucleation pressure in order to investigate the receding behavior of wicked liquid. On the various types of surface morphology including smooth, nanostructure, nanoporous, and microstructure, it was clearly observed that wicked liquid receded from expanding dry area except for a smooth surface. The receding velocity was slower at microstructure, nanoporous, and nanostructure, in order. Clearly this result provides a hydrodynamic evidence of smaller dry area size and contact line length on microscale structure than on nanoscale structure. Moreover, the diameter of dry area showed a linear relation with CHF enhancement that indicates smaller diameter of dry area is more effective to delay irreversible expansion of dry spots. This novel observation is expected to provide reliable analysis of contact line dynamics with CHF enhancement on wicking-dominant surfaces. (C) 2018 Elsevier Ltd. All rights reserved.
机译：芯吸液的原位流体动力学行为来自于三重接触线处的界面动力学，导致围绕干点扩展的运动减弱。我们在这里介绍一种芯吸实验的新技术，它采用等效于气泡成核压力的外部压力源，以研究芯吸液体的后退行为。在各种类型的表面形态上，包括光滑，纳米结构，纳米孔和微观结构，可以清楚地看到，除光滑表面外，芯吸液体从干燥区域的扩张中退缩了。在微观结构，纳米孔和纳米结构上，后退速度较慢。显然，该结果提供了比纳米级结构更小的干燥区域尺寸和接触线长度的流体力学证据。此外，干燥区的直径与CHF增强呈线性关系，表明较小的干燥区直径更有效地延迟了干燥斑的不可逆扩展。预期该新颖的观察将为芯吸主表面上的CHF增强提供接触线动力学的可靠分析。 （C）2018 Elsevier Ltd.保留所有权利。

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