Concavity Induced Heat Transfer Enhancement

主要研究人员建议研究一种新的强化热表面对流换热的技术。将在表面上形成凹形凹槽阵列，以诱导更高的传热率。这一概念是由俄罗斯科学家在1995年举行的一次国际会议上首次提出的。俄罗斯科学家推测，凹面上方流动产生的龙卷风般的爆发是导致热量增强的原因。主要研究人员的初步实验测量确实显示了热量传递的增强，但没有龙卷风般的爆发。这项拟议的工作将包括使用瞬变液晶技术进行全面的实验测量，以确定凹坑的全部效应。将使用基于有限体积的计算机程序进行三维数值模拟，以揭示流动行为。

ABSTRACT The principal investigators propose to study a new technique to enhance convective heat transfer from hot surfaces. Arrays of concave indentations will be created on the surface to induce higher rates of heat transfer. This concept was first mentioned by Russian scientists at an international conference held in 1995. The Russian scientists conjectured that tornado-like bursts resulting from flow over the concavities were responsible for the enhanced heat transfer. Preliminary experimental measurements by the principal investigators did show enhanced heat transfer, but not the presence of tornado-like bursts. The proposed work will include comprehensive experimental measurements using the transient liquid crystal technique to establish the full effects of concavities. Three-dimensional numerical simulations using a finite-volume based computer code will be carried out to reveal the flow behavior.