مهندسی مکانیک مدرس

مهندسی مکانیک مدرس

مدل سازی عددی میکروپمپ پیزوالکتریک

نوع مقاله : پژوهشی اصیل

نویسندگان
حسن نعمتی 1
مجید رجبی 2
1 دانشگاه تهران
2 دانشگاه علم و صنعت ایران
10.48311/MME.24.6.399
چکیده
هدف: پیشرفت ها در تکنولوژی‌های میکرو الکترومکانیکی (MEMS) طی چند دهه گذشته به توسعه سریع طیف وسیعی از دستگاه‌های میکرو فلوئیدیک با عملکردهای مختلف کمک کرده است از میان دستگاه‌های مختلفی که پیشنهادشده‌اند، میکرو پمپ‌ها که انرژی لازم برای راندن سیالات را از طریق سیستم‌های میکرو فلوئیدیک فراهم می‌کنند؛ بنابراین در پژوهش حاضر قصد براین است تا به‌طور پارامتری اثرات پارامترهای اصلی، یعنی طول، عرض و زاویه حمله سوپاپ‌ها، طول پیزوالکتریک و ولتاژ اعمال‌شده را موردبررسی قرار گیرد. روش: رویکرد پژوهش حاضر کاربردی محور و تحلیلی -آزمایشی با شبیه‌سازی‌های عددی که نیروی کشش و معادلات با استفاده از الگوریتم کاملاً کوپل شده درنرم افزار COMSOL Multiphysics محاسبه می‌شوند. یافته‌ها: نتایج حاصل از پژوهش حاضر نشان می‌دهد پارامترهای اصلی به‌طور قابل‌توجهی عملکرد میکرو پمپ طراحی‌شده را تحت تأثیر قرار می‌دهند.به طوری که ولتاژ اعمال‌شده ۴۰۰ ولت، زاویه حمله ۴۵ درجه و عرض شیرها ۶میکرومتر،به ترتیب برای طول پیزوالکتریک ۴،۲و۵ میلی متر دبی جریان6/0، 9/6 و6/16 میکرو لیتر بر دقیقه به دست می‌آید. برای عرض‌های شیر ۶ و۸میکرومتر، زاویه‌های حمله بهینه ۶۰ و ۶۵ درجه ، دبی مربوطه به ترتیب 1/11 و9/5 میکرو لیتر در دقیقه است. نتیجه‌گیری: بر اساس نتایج حاصل از پژوهش حاضر و بررسی رفتار میکرو پمپ و تغییرات دبی خروجی آن در شرایط کاری مختلف، هرچه طول شیرها افزایش یابد، دبی ارائه‌شده بیشتر می‌شود. درنهایت، یک شرط مطلوب برای عرض و زاویه حمله سوپاپ‌ها وجود دارد؛ که این عرض مطلوب به‌سرعت جریان بستگی ندارد.
کلیدواژه‌ها
میکرو پمپ پیزوالکتریک
شیر غیرفعال
مدل‌سازی عددی
غشای منعطف

موضوعات

عنوان مقاله English

Numerical Modeling of Piezoelectric Micropump

نویسندگان English

hassan nemati garetapeh 1
majid rajabi 2
1 University of Tehran
2 Iran University of Science and Technology
چکیده English

Objective: Advances in microelectromechanical (MEMS) technologies over the past few decades have contributed to the rapid development of a wide range of microfluidic devices with different functionalities. Fluids are driven through microfluidic systems, therefore, in the current research, it is intended to parametrically investigate the effects of the main parameters, namely length, width and angle of attack of valves, piezoelectric length and applied voltage. Method: The approach of the present research is applied and analytical-experimental with numerical simulations where the tensile force is calculated using COMSOL Multiphysics software and the equations are calculated using the fully coupled algorithm in COMSOL Multiphysics. Findings: The results of the present research show that the main parameters significantly affect the performance of the designed micro pump. So that the applied voltage is 400 volts, the angle of attack is 45 degrees and the width of the valves is 6 micrometers, respectively for the piezoelectric length of 4, 2 and 5 mm, the flow rate is 6. 0.6, 9.6 and 16.6 microliters per minute are obtained. For valve widths of 6 and 8 micrometers, optimal attack angles of 60 and 65 degrees, the corresponding flow rates are 11.11 and 5.9 microliters per minute, respectively. Conclusion: Based on the results of the present research and the investigation of the behavior of the micropump and its output flow rate changes in different working conditions, as the length of the valves increases, the flow rate provided increases. Finally, there is a favorable condition for the width and angle of attack of the valves. This optimal width does not depend on the flow speed.

کلیدواژه‌ها English

Piezoelectric Micropump
Passive Valve
Numerical Modeling
Flexible Membrane
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مهندسی مکانیک مدرس
دوره 24، شماره 6
خرداد 1403
صفحه 399-409