Overseas Travel: National Technical University of Athens

分散湍流多相流中的相变效应在许多工业问题中都有应用(过冷的核沸腾、发动机中燃料液滴的蒸发和燃烧、医院环境中细菌液滴的分散)。这笔海外旅行补助金的目的是通过与雅典技术大学热流体系(由贝格勒斯教授领导)直接互动和交流，发展PI的计算专业知识，该系开发了许多特定的内部程序(DNS、LES、VOF)，并应用它们来描述内燃机中的燃烧。其目的是让PI修改数字代码，以便将其应用于研究与相变过程相关的基本过程。随着PI提出的分析工作，代码的结果将得到验证，并应用于相变重要时的色散新研究。这次访问将持续2个月，足够在计算方面取得进展，12个月后报告最终交付结果。

The effect of a phase change in dispersed turbulent multiphase flows has applications to many industrial problems (sub-cooled nucleate boiling, fuel droplet evaporation and combustion in engines, bacteria laden droplet dispersion in the hospital environment). The aim of this Overseas Travel Grant is to develop the computational expertise of the PI by direct interaction and exchange with the Thermofluids Section at Athens Technical University (headed by Prof Bergeles) who has developed a number of specific inhouse codes (DNS, LES, VOF) and has applied them computational models describing combustion in internal combustion engines. The aim is for the PI to modify numerical codes in order to apply them to study the fundamental processes associated with phase change processes. With the analytical work proposed by the PI, the results from the codes will be validated and applied to new research into dispersion when phase change is important. The visit will be for 2 months, sufficiently long to make head way on the computational side, with the final deliverable reported after 12 months.