تحلیل عددی یک میکروپمپ مکانیکی با استفاده از میکروشیرهای غشایی برای کاربردهای میکروسیالاتی

نوع مقاله : مقاله پژوهشی

نویسندگان

دانشکده مهندسی برق، دانشگاه علوم و فنون هوایی شهید ستاری، تهران، ایران

چکیده

در این مقاله، به تحلیل عددی یک میکروپمپ جهت استفاده در کاربردهای میکروسیالاتی اشاره شده است. هر کدام از قسمت‌های میکروپمپ شامل میکروشیرها و محفظه ی پمپاژ، با استفاده از روش تحلیل برهم کنش سیال-جامد در فضای سه‌بعدی مورد بررسی قرار گرفته اند و نتایج عملکرد آن‌ها بصورت مستقل استخراج شده است. از این نتایج برای حل معادله فشار پمپاژ میکروپمپ استفاده شده تا به کمک آن نرخ جریان میکروپمپ در حوزه زمان بدست آید. سپس، اثرات تغییر دامنه تحریک، فرکانس تحریک و فشار معکوس بر روی نرخ جریان میکروپمپ در حوزه زمان مورد مطالعه قرار گرفته است. نتایج شبیه‌سازی میکروشیر نشان می‌دهد که اگر فشار سیال از یک سطح آستانه که مقدار آن برابر 100 پاسکال است بیشتر شود، جریان برقرار می‌شود. ولی در مد عملکرد معکوس می‌تواند جریان سیال را با نرخ نشتی قابل اغماض، سد کند. بررسی‌ها نشان می‌دهد، زمانی‌که فرکانس تحریک برابر 1 هرتز است، به ازای فشار تحریک 1000، 1500 و 2000 پاسکال، نرخ جریان میکروپمپ به ترتیب برابر با 30، 48 و 65  میلی متر مکعب بر دقیقه می‌باشد که مقداری رایج در میکروپمپ‌های میکروسیالاتی و آزمایشگاه روی تراشه می‌باشد. همچنین زمانی‌که دامنه تحریک برابر 1000 پاسکال است، فارغ از فرکانس تحریک، میکروپمپ حداکثر می‌توان بر فشار معکوس حدود 950 پاسکال غلبه کند. نتایج بدست‌آمده نشان می‌دهد که میکروپمپ شبیه‌سازی‌شده برای کاربردهای ریزسیالاتی و آزمایشگاه روی تراشه تطبیق دارد.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Numerical analysis of mechanical micropump using membrane-based check-valves for microfluidic applications

نویسندگان [English]

  • Jalil Mazloum
  • Alireza shamsi
Department of Electrical Engineering, Shahid Sattari Aeronautical University of Science and Technology
چکیده [English]

In this paper, we mentioned a numerical analysis method for simulation of a micropump for microfluidic applications. Each section of the micropump, including microvalves and pumping chamber, were studied using three-dimensional fluid-structure interaction analysis and their operational characteristic equations were extracted independently. These extracted equations were used to solve time-domain pressure equation and to obtain the flow rate of micropump. Afterwards, we were able to study different effects of actuation pressure and actuation frequency on micropump’s flow rate with and without the presence of outlet backpressure. The results of microvalve show that it lets fluid pass through after passing threshold pressure of about 100 Pa. However, it blocks fluid flow in reverse mode with extremely negligible leakage rate. The results of micropump operation show that when actuation frequency is 1 Hz and actuation pressures are equal to 1000, 1500, 2000 Pa, pumping flow rate reaches 30, 48 and 65 mm3/min, respectively. Also, this micropump can overcome maximum backpressure of approximately 950 Pa when it was actuated using pressure of 1000 Pa, regardless of its actuation frequency. These results show that the simulated micropump reasonably agrees to the microfluidic and lab-on-a-chip applications.

کلیدواژه‌ها [English]

  • Microfluidics
  • Micropump
  • Microvalve
  • Finite element method
  • Fluid-structure interaction

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نشریه مهندسی مکانیک امیرکبیر
دوره 53، شماره 5 (Special Issue)
مرداد 1400
صفحه 3171-3186

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