بررسی عددی سه بعدی تاثیر پارامترهای فیزیکی بر رفتار مولد گردابه انعطاف‌پذیر و انتقال حرارت درون یک میکروکانال

نوع مقاله : گرایش پیشرانش و انتقال حرارت

نویسندگان

1 دانشجوی دکتری، دانشکده مهندسی مکانیک، دانشگاه گیلان، رشت، ایران

2 نویسنده مسئول: دانشیار، دانشکده مهندسی مکانیک، دانشگاه گیلان، رشت، ایران

3 دانشیار، دانشکده مهندسی مکانیک، دانشگاه گیلان، رشت، ایران

چکیده

در این مقاله تأثیر پارامترهای هندسی بر رفتار مولد گردابه انعطاف‌پذیر و انتقال حرارت در یک میکروکانال سه‌بعدی مورد بررسی قرار گرفته است. هدف اصلی این مطالعه، تحلیل اثرات پارامترهای هندسی مولد گردابه بر انتقال حرارت و افت فشار در میکروکانال‌ است. شبیه‌سازی‌های عددی با استفاده از نرم‌افزار کامسول انجام شده است تا تأثیر تغییرات پهنا و عرض مقطع مولد گردابه و همچنین سرعت جریان ورودی بررسی گردد. در این پژوهش، پهنا و عرض مقطع مولد گردابه در محدوده 15/0 تا 3/0 میلی‌متر بررسی شده است. نتایج نشان داد که با افزایش عرض مولد در سرعت ثابت، عدد ناسلت حداکثر تا 3 درصد افزایش یافته است. علاوه بر این، افزایش پهنای مولد از 15/0 میلی‌متر به 3/0 میلی‌متر منجر به افزایش جابجایی نوک مولد شد که این امر نشان‌دهنده کاهش مقاومت جریان و افزایش کارایی در جلوگیری از تشکیل لایه مرزی می‌باشد. در این مطالعه، سه محدوده سرعت جریان (71/1، 28/2، و 42/3 متر بر ثانیه ) نیز مورد بررسی قرار گرفت. نتایج نشان داد که با افزایش سرعت جریان، عدد ناسلت افزایش و ضریب اصطکاک کاهش یافته که منجر به کاهش افت فشار سیستم می‌شود.

چکیده تصویری

بررسی عددی سه بعدی تاثیر پارامترهای فیزیکی بر رفتار مولد گردابه انعطاف‌پذیر و انتقال حرارت درون یک میکروکانال

تازه های تحقیق

  • یک مولد گردابه انعطاف پذیر به صورت عددی شبیه‌سازی شده است.
  • تاثیر ابعاد هندسی مولد در یک میکروکانال بر میدان جریان و انتقال حرارت بررسی شد.
  • بهترین محدوده عملکرد مولد گردابه برای حالتی که پهنا و عرض مولد در بیشینه مقدار در محدوده بررسی بوده‌اند.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

A 3D Numerical Study of the Impact of Physical Parameters on the Behavior of a Flexible Vortex Generator and Heat Transfer within a Microchannel

نویسندگان [English]

  • Mahdi Sheikhizad Saravani 1
  • Hamed Mohaddes Deylami 2
  • Mohammad Naghashzadegan 3
1 Ph.D. Student, Faculty of Mechanical Engineering, University of Guilan, Rasht, Iran
2 Corresponding author: Associate Professor, Faculty of Mechanical Engineering, University of Guilan, Rasht, Iran
3 Associate Professor, Faculty of Mechanical Engineering, University of Guilan, Rasht, Iran
چکیده [English]

In this paper, the impact of geometric parameters on the behavior of a flexible vortex generator and heat transfer in a three-dimensional microchannel is investigated. The primary objective of this study is to analyze the effects of the geometric parameters of the vortex generator on heat transfer and pressure drop within the microchannel. Numerical simulations were conducted using COMSOL software to examine the influence of variations in the width and height of the vortex generator cross-section, as well as the inlet flow velocity. In this research, the width and height of the vortex generator cross-section were analyzed within the range of 0.15 to 0.3 mm. The results indicated that increasing the width of the generator at a constant velocity resulted in up to a 3% increase in the Nusselt number. Additionally, increasing the width of the generator from 0.15 mm to 0.3 mm led to an increase in the generator tip displacement, indicating reduced flow resistance and enhanced efficiency in preventing boundary layer formation. The study also examined three ranges of flow velocity (1.71, 2.28, and 3.42 m/s). The results showed that as the flow velocity increased, the Nusselt number increased, while the friction coefficient decreased, and leading to a reduction in the system's pressure drop.

کلیدواژه‌ها [English]

  • Flexible vortex generator
  • Numerical study
  • Microchannel
  • Fluid-structure interaction


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مکانیک هوافضا
دوره 20، شماره 4 - شماره پیاپی 78
شماره پیاپی 78، فصلنامه زمستان
اسفند 1403
صفحه 71-86

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سابقه مقاله

  • تاریخ دریافت: 05 شهریور 1403
  • تاریخ بازنگری: 31 شهریور 1403
  • تاریخ پذیرش: 19 مهر 1403
  • تاریخ انتشار: 01 اسفند 1403

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