Transport in a Continuously Moving Material Undergoing Thermal Processing

这项实验和数值研究是在热加工领域进行的。这项研究将研究材料中的传导和对流流体流动之间的耦合效应，材料出现点上游的边界条件的贡献，流体中浮力和辐射损失的增强，以及湍流的影响。人们还对表面的传热率、下游温度的衰减以及材料速度、温度水平、材料和流体性质等重要物理变量的影响感兴趣。这些方面在过程的模拟以及相关物理系统的优化、控制和设计中是重要的。所获得的结果将有助于对基本物理过程的基本了解，并将为改进和设计实用的材料处理系统提供重要的投入。在与材料热加工相关的各种应用中，如挤压、轧制和连铸，都会遇到受热传递环境影响的连续运动的材料。在许多情况下，材料本身的运动产生了用于热传输的流体流动，这就是本研究工作中建议进行详细实验和数值研究的情况。尽管这一问题具有相当大的现实和根本性重要性，但很少进行详细的研究，以回答出现的许多基本问题，并为工艺设计提供相关的投入。

This experimental and numerical research is in the area of thermal processing. The investigation will study the effects of the coupling between the conduction in the material and the convective fluid flow, the contributions of the boundary conditions at an upstream of the point of emergence of the of the material, the augmentation by buoyancy forces in the fluid and by radiative loss, and the influence of turbulence. Interest also lies in the heat transfer rate at the surface, the downstream temperature decay and the effect of the important physical variables such as material velocity, temperature levels and material and fluid properties. These aspects are important in the simulation of the process and in the optimization, control and design of the relevant physical system. The results obtained will contribute to a basic understanding of the underlying physical processes and will provide important inputs for improving and designing practical materials processing systems. In a wide variety of applications related to the thermal processing of materials, such as extrusion, rolling and continuous casting, continuously moving materials subjected to heat transfer environments are encountered. In many cases, the motion of the material itself generates the fluid flow for the thermal transport and this is the circumstance proposed for detailed experimental and numerical investigation in this research effort. Though the problem is of considerable practical and fundamental importance, little detailed study has been undertaken to answer many of the basic issues that arise and to provide the relevant inputs for process design.