Numerical study of turbulent flow in eccentric annular pipes

流体流动可以是平稳的、稳定的、层流的，也可以是波动的、不稳定的、湍流的。在同一流动中常常有层流区和紊流区。这种流动是令人感兴趣的，但并不经常使用计算机进行数值研究。在本计画中，我们将针对具有偏心圆柱形核心的管道内的流动进行研究。然后，在芯部和管壁之间的差距小的地方，流动可以是层流，并且在芯部的相对侧上流动可以是湍流。这种几何形状便于数值计算，因此可以更详细地研究这种层流湍流的性质。

Fluid flow may be smooth and steady, laminar, or fluctuating and unsteady, turbulent. Often there are laminar and turbulent regions in the same flow. Such flows are of interest but were not often investigated numerically using a computer. In this project such a study will be done in the case of the flow inside a pipe, which has an eccentric cylindrical core inside. Then where the gap between the core and the pipe wall is small the flow can be laminar, and it can be turbulent on the opposite side of the core. This geometry is convenient for numerical calculations, and therefore the nature of such a laminar-turbulent flow can be investigated in more detail.