Enhancement of Heat Transfer by Stimulated Transition to Turbulence in Natural Convection Boundary Layers on Heated Walls

这个项目的目的是通过刺激湍流的早期过渡来增加从加热的垂直表面到环境流体的热量传递。这种被动传热发生在传热装置、自然通风系统和许多环境设置中。增强的传热将大大提高这些系统的性能。该项目将提供二次展向模态的长度尺度、频率和放大率，这是湍流过渡的主要机制。这将为适当的粗糙度元素、加热长度和时间尺度的发展提供指导。

The aim of this project is to increase the heat transfer from heated vertical surfaces to an ambient fluid by stimulating an early transition to turbulence. Such passive heat transfer occurs in heat transfer devices, natural ventilation systems and in many environmental settings. Enhanced heat transfer will greatly improve the performance of these systems. The project will provide the length scales, frequency and amplification rate for the occurence of the secondary spanwise mode that is the primary mechanism for turbulent transition. This will provide guidance for the development of appropriate roughness elements and heating length and time scales.