CHALLENGES IN THE ACCURATE NUMERICAL SIMULATION OF PRACTICAL THERMAL PROCESSES AND SYSTEMS
The numerical simulation of practical thermal processes is generally complicated because of multiple transport mechanisms and complex phenomena that commonly arise. In addition, the materials encountered are often not easily characterized and typically involve large property changes over the ranges of interest. The boundary conditions may not be properly defined and or may be unknown. The geometry and interactions between different components are also often quite complicated. However, it is important to obtain accurate and dependable numerical results from the simulation in order to study, design, and optimize most practical thermal processes of current and future interest. The models employed must be validated and the accuracy of the simulation results established if the simulation is to form the basis for improving existing systems and developing new ones in applications areas such as energy, manufacturing, environmental control, electronics cooling, and transportation. This paper focuses on the main challenges that are encountered in obtaining accurate numerical simulation results on practical thermal processes and systems. It considers a wide variety of systems, ranging from materials processing to energy and cooling. Of particular interest are concerns like verification and validation, imposition of appropriate boundary conditions, and modelling of complex, multimode transport phenomena in multiple scales. Additional effects such as viscous dissipation, surface tension, buoyancy and rarefaction that could arise and complicate the modelling are discussed. Uncertainties that arise in material properties and in boundary conditions are also important in design and optimization. Large variations in the geometry and coupled multiple regions are also discussed. The methods that may be used to meet these challenges are discussed, along with typical results for a range of important processes. Future needs in this interesting and challenging area are also outlined.
Yogesh Jaluria
Board Of Governors Professor,Department of Mechanical & Aerospace Engineering,Rutgers University,Piscataway, NJ 08854, USA.
国际会议
2nd International Conference on Computational Methods for Thermal Problems(第二届热问题计算方法国际会议)
大连
英文
3-18
2011-09-05（万方平台首次上网日期，不代表论文的发表时间）