静水中气泡帷幕产生水平流的数值模拟研究

本文以变密度单流体的连续性方程、雷诺平均方程和k-ε方程为控制方程,采用VOF方法追踪空气和水的界面,通过在连续性方程中添加附加质量源,建立了静水中气泡帷幕的数学模型。数值模拟得到的静水中气泡帷幕产生水平流的特性与Bulson的试验结果吻合较好。通过对数值计算结果的分析得到不同供气量Q时气泡帷幕产生的水平流速度Vm,水平流厚度d等主要特征,对气幕防波堤的消波性能研究具有指导意义。

Numerical simulation study on the horizontal current generated by air bubbles curtain in still water

The numerical simulation of air bubbles curtain in still water is presented in this paper. Using single phase fluid with variable density simulates water and air, two phase actions. The continuity equation, the Reynolds average equations and the standard k -ε equations are selected as the governing equations, and the interface of water and air is traced by the VOF method. The additional mass source is added to the continuity equation by the Macro of UDF. The results show that the numerical simulation characteristics of horizontal current generated by air bubbles curtain agree well with the experimental results of Bulson. The numerical results of the velocity and the thickness of the horizontal current produced by air bubbles curtain in still water have been analyzed with various air fluxes that are meaningful to study the performances of the air bubbles breakwater.