مکانیک سیالات و آیرودینامیک

مکانیک سیالات و آیرودینامیک

بررسی عددی رسوب ذرات هوا پخش دی‌اکسید گوگرد و آب در جریان داخل کانال در حضور دو مانع دایره‌شکل با استفاده از روش شبکه بولتزمن

نوع مقاله : مقاله پژوهشی

نویسندگان
1 دانشجوی دکتری،دانشکده مهندسی مکانیک، دانشگاه کاشان، کاشان، ایران
2 دانشیار، دانشکده مهندسی مکانیک دانشگاه کاشان، کاشان ، ایران
چکیده
در کار حاضر، رسوب‌گذاری ذرات هوا پخش دی‌اکسید گوگرد و آب در جریان داخل کانال شامل دو مانع دایره‌ای پشت‌سرهم با استفاده از روش شبکه بولتزمن به‌صورت عددی بررسی شده است. هدف اصلی، مطالعه‌ی تغییر تعداد ذرات رسوب‌کرده در شرایط یک مانع و دو مانع برای دو نوع ذره‌ی متفاوت در اعداد رینولدز مختلف است. شبیه‌سازی عددی با استفاده از مدل شبکه بولتزمن D2Q9 و به زبان برنامه‌نویسی C++ انجام شده است. ذرات رهاشده در کانال شامل آب و دی‌اکسید گوگرد با قطرهای ۱۰۰ نانومتر، ۱ و ۱۰ میکرومتر بوده‌اند. عدد رینولدز در بازه‌ی ۵۰ تا ۸۰۰ تغییر کرده است. نتایج نشان داد که نوع زره، اندازه ذره، عدد رینولدز و تعداد موانع بر فرایند رسوب‌گذاری تأثیرگذار هستند. برای اعداد رینولدز بالاتر از ۲۰۰، تعداد ذرات رسوب‌کرده بر روی موانع مشابه است. در عدد رینولدز ۵۰، به دلیل سنگین بودن ذرات دی‌اکسید گوگرد، تعداد رسوب بر روی موانع تنها ۳ عدد بود که بسیار کمتر از ۱۷ ذره‌ی آب در شرایط مشابه است. این تعداد در هر دو حالت تک مانع و دو مانع یکسان باقی ماند. در عدد رینولدز ۲۰۰، تعداد ذرات رسوب شده بر روی موانع در حالت دو مانع تقریباً دوبرابر حالت تک مانع به دست آمد
کلیدواژه‌ها

عنوان مقاله English

Numerical Study of Deposition of Aerosol Particles of Sulfur Dioxide and Water in the Flow Inside the Channel in the Presence of two Circular Obstacles Using the Lattice Boltzmann Method

نویسندگان English

babak roshani 1
Ahmad Reza Rahmati 2
1 PhD Student, Department of Mechanical Engineering, University of Kashan, Kashan, Iran
2 Associate Professor, Department of Mechanical Engineering, University of Kashan, Kashan, Iran
چکیده English

In the present study, the deposition of airborne sulfur dioxide and water particles in a channel flow with two consecutive circular obstacles was numerically investigated using the lattice Boltzmann method. The main objective was to examine the variation in the number of deposited particles under one- and two-obstacle conditions for two different particle types at various Reynolds numbers. The numerical simulation was performed using the Lattice Boltzmann D2Q9 model implemented in C++. The released particles in the channel were water and SO₂ with diameters of 100 nm, 1 μm, and 10 μm. Reynolds numbers ranged from 50 to 800. The results showed that particle type, particle size, Reynolds number, and the number of obstacles significantly influenced the deposition process. For Reynolds numbers higher than 200, the number of deposited particles on the obstacles was nearly the same. At Reynolds number 50, due to the heavier nature of SO₂ particles, only 3 particles were deposited on the obstacles, which was much fewer than the 17 deposited water particles under the same condition. This number remained unchanged for both one- and two-obstacle cases. At Reynolds number 200, the number of deposited particles on the obstacles in the two-obstacle case was almost twice that of the one-obstacle case.

کلیدواژه‌ها English

Lattice Boltzmann Method
Curved Obstacle
Particle Tracking
Deposition Mechanism
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دوره 14، شماره 2 - شماره پیاپی 36
پاییز و زمستان
اسفند 1404
صفحه 167-182

  • تاریخ دریافت 13 مهر 1404
  • تاریخ بازنگری 01 آذر 1404
  • تاریخ پذیرش 18 آذر 1404
  • تاریخ انتشار 01 اسفند 1404