Transition of thermal boundary layers on heated flat and curved surfaces

本计画旨在研究热边界层由层流到紊流的转捩。TBL的状态决定了自然对流热交换器和散热系统的传热速率和能量效率。预期的结果是了解TBL的过渡行为，并制定有效的策略，刺激TBL过渡，以提高传热。本计画将发展一种高解析度、低成本且易于实现的立体阴影法三维容积流量量测技术，并将其应用于TBL转换的研究。该技术将为流体力学和传热学研究提供有力的工具。

This project aims to study the laminar to turbulent transition of the thermal boundary layer (TBL). The state of the TBL determines the heat transfer rate and energy efficiency of natural convection heat exchangers and heat dissipation systems. The intended outcome is to understand the TBL’s transitional behaviour and develop effective strategies for stimulating TBL transition to enhance heat transfer. This project will develop a high-resolution, low-cost and easy-to-implement three-dimensional volumetric flow measurement technique based on stereoscopic shadowgraph and use it to study the TBL transition. This technique should provide a powerful tool for fluid mechanics and heat transfer research.