An investigation of the conjugate heat transfer in turbulent natural convection with irregularly rough wall

不规则粗糙壁面湍流自然对流共轭传热研究

• 批准号: 22K03966
• 负责人: LI CHUNGGANG
• 金额: $ 2.58万
• 依托单位: Kobe University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2022
• 资助国家: 日本
• 起止时间: 2022-04-01 至 2023-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-22K03966/
• 关键词: conjugate heat transfer; compressible flow; natural convection; irregularly rough wall; transition

The conjugate heat transfer (CHT) solver based on compressible flow framework which can calculate the convection in the fluid and the conduction in the solid simultaneously has been developed. However, due to the different scales of the characteristic velocities between the fluid and solid, the extremely smaller time step is inevitable. To overcome this problem, the Adaptive Time Scheme developed by authors for computational aeroacoustics is under modification to be applied to CHT problems to increase the time step to save computational time. Besides, to validate the current framework, the simulation of the natural convection and heat conduction around and in a horizontal circular pipe is studied.

开发了基于可压缩流框架的共轭传热求解器，该求解器可以同时计算流体中的对流和固体中的传导。然而，由于流体和固体之间的特征速度的尺度不同，极小的时间步长是不可避免的。为了克服这一问题，对作者提出的计算气动声学自适应时间方案进行了改进，使其应用于CHT问题，增加了时间步长，从而节省了计算时间。此外，为了验证现有框架，对水平圆管周围和内部的自然对流和热传导进行了模拟研究。