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首页> 外文期刊>Bulletin of the American Physical Society >APS -70th Annual Meeting of the APS Division of Fluid Dynamics- Event - A Bridge Too Far: Suppressing Frost Using an Out-of-Plane Dry Zone
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APS -70th Annual Meeting of the APS Division of Fluid Dynamics- Event - A Bridge Too Far: Suppressing Frost Using an Out-of-Plane Dry Zone

机译：APS-APS流体动力学分部第70届年会-事件-一座桥梁过远：使用平面外干燥区来抑制霜冻

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It has recently been shown that ice can suppress the formation of any nearby condensation or frost on a substrate. However, these in-plane dry zones require the hygroscopic ice features to be placed on the same surface they are helping to keep dry, which makes it impossible to achieve complete anti-frosting. Here, we create an out-of-plane dry zone by holding two aluminum surfaces parallel to each other, where a uniform sheet of frost was grown on one surface to keep the other surface completely dry. The critical separation required to keep the test surface dry was found to be a function of the ambient supersaturation. We also show that inter-droplet ice bridging, now known to be a primary mechanism for in-plane frost growth, can be similarly extended to an out-of-plane configuration. We freeze a droplet on a hydrophobic surface and suspend a water droplet above it, such that an ice bridge grows toward the water droplet. More generally, these findings show that the recently discovered phenomena of dry zones and ice bridging can be extended to out-of-plane scenarios, which could lead to a better understanding of the behavior of mixed-phase systems.
机译：最近显示，冰可以抑制基材上附近任何凝结或结霜的形成。但是，这些面内干燥区域要求将吸湿冰块放置在它们有助于保持干燥的同一表面上，这使得无法实现完全的防霜冻。在这里，我们通过保持两个彼此平行的铝表面来创建平面外干燥区域，在该表面上，一层均匀的霜冻生长在一个表面上，以保持另一个表面完全干燥。发现保持测试表面干燥所需的临界间隔是环境过饱和度的函数。我们还表明，液滴间的冰桥桥接（现在已知是平面内霜冻生长的主要机制）可以类似地扩展到平面外构造。我们将水滴冻结在疏水表面上，并将水滴悬浮在其上方，以使冰桥朝着水滴生长。更一般而言，这些发现表明，最近发现的干燥区和冰桥现象可以扩展到平面外场景，这可能导致人们更好地理解混合相系统的行为。

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