شبیه سازی و تحلیل حجم باقی مانده برخورد قطره با سیلندر با مقطع لوزی شکل به روش حجم سیال
محورهای موضوعی : Mechanical Engineeringجواد عالیشاه 1 , سروش مداح 2 , جواد علی نژاد 3 , yassr rostamiyan 4
1 - دانشجوی دکتری مهندسی مکانیک دانشگاه ازاد اسلامی واحد ساری
2 - گروه مکانیک دانشکده فنی و مهندسی دانشگاه ازاد اسلامی واحد ساری
3 - گروه مکانیک،دانشکده فنی دانشگاه ازاد اسلامی واحد ساری، ایران
4 - گروه مکانیک دانشکده فنی دانشگاه ازاد اسلامی واحد ساری ایران
کلید واژه: سیلندر, مقطع لوزی, حجم باقی مانده, قطره, روش حجم سیال ,
چکیده مقاله :
در این مقاله برخورد یک قطره آب روی یک سیلندر افقی با سطح مقطع لوزی به صورت سه بعدی شبیه سازی شده است. نوآوری کار حاضر بررسی تغییر شکل، تقسیم و حجم باقی مانده برخورد قطره نیوتنی با سطح مقطع لوزی می‌باشد. برای شبیه سازی عددی این پدیده، از روش حجم سیال بر اساس زاویه تماس دینامیک جهت ردگیری سطح مشترک سیال - جامد استفاده شده است. برای اعتبار سنجی نتایج برخورد قطره آب با قطر mm 2 با سرعت m/s 1 روی لوله ای افقی با قطر mm 18/3 با mm 55/1 انحراف از مرکز، شبیه سازی شده است. تصاویر شبیه سازی شده تغییر شکل قطره پس از برخورد به خوبی با نتایج آزمایشگاهی تطابق دارد. سپس برخورد قطره روی سیلندرهای با مقطع لوزی مورد بررسی قرار گرفت. محاسبه حجم باقیمانده و تقسیم شده قطره نشان می دهد که حداکثر حجم باقیمانده قطره (m39-10×7522/2) روی استوانه با قطر4/2 d = سرعت m/s1=v و حداقل حجم باقیمانده قطره (m39-10×8391/0) روی استوانه با قطر6/1 d = میلی متر و سرعت m/s2 = v می‌باشد.
Abstract In this article, the impact of a water drop on a horizontal cylinder with a rhombus cross-section is simulated in three dimensions. The innovation of the present work is to investigate the change in the shape of the division and the remaining volume of the collision of a Newtonian droplet with a rhombic cross-section. For the numerical simulation of this phenomenon, the volume of Fluid method based on the dynamic contact angle has been used to track the fluid-solid interface. To validate the results, the impact of a water drop with a diameter of 2 mm at a speed of 1 m/s on a horizontal pipe with a diameter of 3.18 mm and a deviation of 1.55 from the center has been simulated. The simulated images of drop shape change after impact agree well with the experimental results. Then the impact of drops on cylinders with a rhombus section was investigated. The calculation of the remaining and divided volume of the drop shows that the maximum remaining volume of the drop (2.7522 x 10-9m3) is on the cylinder with a diameter of d= 2.4 mm and speed V= 1m/s and the minimum remaining volume of the drop (0.8391 x 10-9m3) on the cylinder with a diameter of d= 1.6 mm and speed V=2 m/s.
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