Amirkabir University of Technology Amirkabir Journal of Mechanical Engineering 2008-6032 52 4 2019 01 16 Simulation of the Liquid Spraying Process in the Dripping Mode by Using the Level- Set Method Simulation of the Liquid Spraying Process in the Dripping Mode by Using the Level- Set Method 847 862 3235 10.22060/mej.2019.14689.5914 FA Reza Khanpour Yasouj University, Yasouj, Iran Journal Article 2018 07 04 In this study, liquid spraying process and drop formation in the dripping mode is simulated using a sharp interface method and effect of important parameters on this process such as Weber number, Ohnesorge number, and the Bond number is investigated. The level-set method is used for interface tracking. Discontinuities at the interface are imposed using the ghost fluid method. It is observed that by increasing the Weber number (from 0.0027 to 0.1875), the length of the outlet liquid  is increased by about 7 percent and the liquid breakup time is decreased by about 52 percent. Also, at higher Weber numbers, the liquid return toward the nozzle after droplet detachment is less. Increasing the Ohnesorge number (from 0.0002 to 0.189) increases the length of the outlet liquid about 21 percent and breakup time about 151 percent. Also, at higher Ohnesorge numbers, the liquid return toward the nozzle is higher. Increasing the Bond number (from 7 to 39) leads to the reduction of the length of the outlet liquid and breakup time about 26 and 91 percent, respectively. At higher Bond numbers, the liquid return toward nozzle is less. Another considerable result is the reduction of the size of formed droplets by enhancement of Bond number. In this study, liquid spraying process and drop formation in the dripping mode is simulated using a sharp interface method and effect of important parameters on this process such as Weber number, Ohnesorge number, and the Bond number is investigated. The level-set method is used for interface tracking. Discontinuities at the interface are imposed using the ghost fluid method. It is observed that by increasing the Weber number (from 0.0027 to 0.1875), the length of the outlet liquid  is increased by about 7 percent and the liquid breakup time is decreased by about 52 percent. Also, at higher Weber numbers, the liquid return toward the nozzle after droplet detachment is less. Increasing the Ohnesorge number (from 0.0002 to 0.189) increases the length of the outlet liquid about 21 percent and breakup time about 151 percent. Also, at higher Ohnesorge numbers, the liquid return toward the nozzle is higher. Increasing the Bond number (from 7 to 39) leads to the reduction of the length of the outlet liquid and breakup time about 26 and 91 percent, respectively. At higher Bond numbers, the liquid return toward nozzle is less. Another considerable result is the reduction of the size of formed droplets by enhancement of Bond number. https://mej.aut.ac.ir/article_3235_840b8c78a53e9796c436ebeabb6507aa.pdf