• pinch-off mechanism for taylor bubble formation in a microfluidic flow-focusing device

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
    • تعداد بازدید: 1011
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     the present work aims at studying the nonlinear breakup mechanism for taylor bubble formation in a microfluidic flow-focusing device by using a high-speed digital camera. experiments were carried out in a square microchannel with cross section of 600 × 600 μm. during the nonlinear collapse process, the variation of the minimum radius of bubble neck (r 0) with the remaining time until pinch-off (τ) can be scaled by a power–law relationship:  due to the interface rearrangement around the neck, the nonlinear collapse process can be divided into two distinct stages: liquid squeezing collapse stage and free pinch-off stage. in the liquid squeezing collapse stage, the neck collapses under the constriction of the liquid flow and the exponent α approaches to 0.33 with the increase in the liquid flow rate q l. in the free pinch-off stage, the value of α is close to the theoretical value of 0.50 derived from the rayleigh–plesset equation and is independent of q l.

سوال خود را در مورد این مقاله مطرح نمایید :

با انتخاب دکمه ثبت پرسش، موافقت خود را با قوانین انتشار محتوا در وبسایت تی پی بین اعلام می کنم
مقالات جدیدترین رویدادها
مقالات جدیدترین ژورنال ها