بررسی عددی تأثیرپذیری افت فشار از نحوه آرایش فیبرها در فیلترهای هوا با استفاده از روش شبکه بولتزمن

نوع مقاله : پژوهشی

نویسندگان

1 Yazd

2 دانشگاه یزد

چکیده

فیلترهای فیبری از جمله رایج‌ترین سیستم‌های جمع‌آوری ذرات معلق در هوا هستند، یکی از کمیت‌های مهمی که در برآورد عملکرد فیلترها حائز اهمیت است، افت فشار می‌باشد. در این مقاله تأثیر نحوه چیدمان فیبرها در محیط فیلتر بر ضریب افت فشار بررسی شده است. سه آرایش موازی، جابجاشده و تصادفی برای مدل ساده شده فیلتر فیبری با کسر حجمی جامد متفاوت بررسی و تحلیل شده است. از آنجایی که روش شبکه بولتزمن در شبیه سازی هندسه های پیچیده بسیار تواناست، مدل سازی محیط فیلتر فیبری با استفاده از روش شبکه بولتزمن انجام شده است. نتایج حاصله با مراجع موجود مقایسه شده و مورد بحث قرار گرفته است. مشاهده می‌شود که مخصوصاً در کسر حجمی جامدهای پایین، استفاده از آرایش منظم به ضریب افت فشار بزرگتری نسبت به آنچه از آزمایشات تجربی به دست آمده و همچنین نسبت به آرایش تصادفی منجر می‌شود.

کلیدواژه‌ها


عنوان مقاله [English]

An investigation on the pressure drop of the particulate flow through fibrous filters using Lattice Boltzmann method

نویسندگان [English]

  • Marzie Babaie rabiee 1
  • Shahram Talebi 2
1
2
چکیده [English]

One of the most common systems to collect the suspended particles from the air is fibrous filters. An important parameter to evaluate the filters performance is pressure drop. In this work the influence of the arrangement of the fibers at the fibrous media on the pressure drop is studied. Three different parallel, staggered and random arrangements are considered to model the fibrous media. The effects of these arrangements are investigated at different solid volume fractions. The results are compared and discussed with existing empirical and semi analytical relations. It is observed that using regular arrangement results in larger pressure drop than random one or which is predicted by empirical tests.

کلیدواژه‌ها [English]

  • air filter
  • fibrous media
  • Numerical simulation
  • Lattice Boltzmann method
  • Pressure drop
  • random arrangement of fibers
 
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