Experimental Characteristics of Viscous Fluid Secondary Breakup

The glycerol solution was chosen as the substitute liquid of asphalt residue at high temperature firstly to probe its atomization characteristics.Then,the experimental observations on the secondary breakup of single droplet in glycerol solution were performed by using high speed camera.From observation and analysis,the deformation and breakup characteristics of droplet, such as breakup mode,characteristic size,breakup time and average droplet diameter were obtained,respectively.As We number increased,the droplet breakup of glycerol solution showed five different modes:bag breakup,bag-stamen breakup,dual-bag breakup,shear breakup and catastrophic breakup.At low We number,the dimensionless maximum cross stream size of the droplet at the onset of breakup was constant.And at high We number,the total breakup time was very short,and the diameter of fragment was exceeding small,which is beneficial to atomization.