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

发展了一种基于可压缩流动框架的共轭换热(CHT)求解器，它可以同时计算流体中的对流和固体中的导热。然而，由于流体和固体之间特征速度的不同尺度，极小的时间步长是不可避免的。为了克服这一问题，作者开发的用于计算气动声学的自适应时间格式正在进行修改，将其应用于CHT问题，以增加时间步长，以节省计算时间。此外，为了验证该框架的有效性，还对水平圆管周围的自然对流和导热进行了数值模拟。

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.