水平管间溴化锂溶液滴状降膜流动分析

o improve the ideal sphere model in the numerical simulation of falling film absorption in droplet mode, the realistic droplet formation process between horizontal tubes was recorded and analyzed. A high speed camera was used to observe the LiBr solution droplet behavior between horizontal tubes separated by 16 mm. The variation of droplet surface area and volume to the time was studied using image edge detection, spline curve fitting algorithm and 2-dimentional curve revolving integral methods. Based on the analysis of the droplet flow process, the droplet deformation between the tubes was divided into three phases, including elongate, unsteady column and break and fall stages. The prediction of the droplet evolution at different solution amount was also proposed. The droplet prediction curve agreed well with the experimental data, indicating that the model could be applied in the simulation of heat and mass transfer of droplet falling film.