Open AccessФормирование и деформация капель жидкости в микроканалах
Author(s) -
Ф.В. Роньшин,
Ю.А. Дементьев,
Е.А. Чиннов
Publication year - 2020
Publication title -
pisʹma v žurnal tehničeskoj fiziki
Language(s) - English
Resource type - Journals
eISSN - 1726-7471
pISSN - 0320-0116
DOI - 10.21883/pjtf.2020.15.49742.18350
Subject(s) - drop (telecommunication) , mechanics , weber number , microchannel , nozzle , materials science , break up , physics , thermodynamics , reynolds number , engineering , mechanical engineering , turbulence
An experimental study of drop formation in narrow horizontal microchannels with rectangular cross section and a height from 50 to 150 micrometers was performed. It is shown that in these channels there is a new flow regime when drops moving along the microchannel, which are vertical liquid bridges. Three mechanisms of the formation of such drops are distinguished: the formation directly near the liquid nozzle, the separation of droplets from the liquid moving along the side walls of the channel, and due to the destruction of strongly deformed drops and horizontal liquid bridges. It was found that the deformation of drops increases with an increase in the Weber number. It is shown that when the first critical value of the Weber number is reached, the drops begin to deform, and when the second Weber number is reached, they break.