PLIC方法在浮法成型模拟中的应用  

APPLICATION OF PLIC METHOD IN SIMULATION OF FLOAT GLASS FORMING

作　　者：张勤[1] 陈泽敬[1] 李志信[1] 

机构地区：[1]清华大学航天航空学院热科学与动力工程教育部重点实验室

出　　处：《工程热物理学报》2010年第6期1013-1015,共3页Journal of Engineering Thermophysics

基　　金：国家科技支撑计划(No.2006BAF02A27);国家重点基础研究发展规划资助项目(No.2007CB206901)

摘　　要：通过分析浮法玻璃生产工艺，建立了玻璃液流动的数学模型，引入连续表面力模型（CSF）计算玻璃液运动界面上的表面张力，并使用连续变化处理模型（CTT）对界面物性间断进行连续性处理，提高了数值计算的鲁棒性。在此基础上，采用分段线性方法（PLIC）重构玻璃液、锡液、保护气体之间的自由界面，追踪玻璃液的运动。对不同唇砖坡度的皮尔金顿锡槽入口端进行了模拟，结果表明：PLIC方法能获得具有较高精细性的自由界面，玻璃液进入锡槽后，存在部分玻璃液向后流动的情况，形成滞流，这部分玻璃液由于在高温区停留时间较长，容易造成玻璃质量缺陷，为了避免玻璃液与耐火砖接触，需提供足够滞流区。Based on the analysis of the float glass production technology, a mathematic model of glass melt flow in the forming process is established. Continuous surface force method （CSF） is used to calculate the surface force on the glass free surface. And the property sudden variation is treated as continuity by continuous transfer treatment method （CTT） at the interface. Robustness of the numerical sinmlation is improved. Then, free surfaces between the glass melt, molten tin and protective gas are reconstructed by piecewise linear interface construction （PLIC）, the movement of glass melt is also tracked. Pilkington tin bath entrances with different lip brick slope are simulated. The result shows that PLIC method can obtain high precision free interface. Back flow exists after the glass melt dropping into the tin bath, and this part of glass melt becomes stagnant flow, and the longer stay of the glass at the high temperature region is easy to result in quality defect. In order to avoid the direct contact with the firebrick, sufficient stagnant region should be provided.

关 键 词：兮段线性 浮法成型 自由界面 

分 类 号：TQ171[化学工程—玻璃工业]