کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
650664 | 1457301 | 2011 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A novel numerical scheme for the investigation of surface tension effects on growth and collapse stages of cavitation bubbles
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: A novel numerical scheme for the investigation of surface tension effects on growth and collapse stages of cavitation bubbles A novel numerical scheme for the investigation of surface tension effects on growth and collapse stages of cavitation bubbles](/preview/png/650664.png)
چکیده انگلیسی
In the present study the effects of surface tension on the growth and collapse stages of cavitation bubbles are studied individually for both spherical and nonspherical bubbles. The Gilmore equation is used to simulate the spherical bubble dynamics by considering mass diffusion and heat transfer. For the collapse stage near a rigid boundary, the Navier-Stokes and energy equations are used to simulate the flow domain, and the VOF method is adopted to track the interface between the gas and the liquid phases. Simulations are divided into two cases. In the first case, the collapse stage alone is considered in both spherical and nonspherical situations with different conditions of bubble radius and surface tension. According to the results, surface tension has no significant effects on the flow pattern and collapse rate. In the second case, both the growth and collapse stages of bubbles with different initial radii and surface tensions are considered. In this case surface tension affects the growth stage considerably and, as a result, the jet velocity and collapse time decrease with increasing surface tension coefficient. This effect is more significant for bubbles with smaller radii.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: European Journal of Mechanics - B/Fluids - Volume 30, Issue 1, JanuaryâFebruary 2011, Pages 41-50
Journal: European Journal of Mechanics - B/Fluids - Volume 30, Issue 1, JanuaryâFebruary 2011, Pages 41-50
نویسندگان
Ehsan Samiei, Mehrzad Shams, Reza Ebrahimi,