آنالیز سه‌بعدی جریان جابه‌جایی اجباری در یک کانال دارای پله همراه با در نظر گرفتن اثرات متقابل میدان مغناطیسی و نانو ذرات جامد

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشکده مهندسی مکانیک، دانشگاه صنعتی سیرجان

2 دانشکده مهندسی مکانیک، دانشگاه صنعتی سیرجان، سیرجان، ایران

چکیده

در این تحقیق، اثرات متقابل میدان مغناطیسی و نانو ذرات جامد بر جریان جابه‌جایی اجباری سه‌بعدی در یک کانال افقی دارای یک پله پس‌رو شیب‌دار مورد بررسی و مطالعه قرار می­گیرد. سیال کاری در این کانال، نانو سیال آب-اکسید آلومینیوم در نظر گرفته شده است. برای شبیه‌سازی پله پس‌رو شیب‌دار در مختصات کارتزین، از روش ناحیه غیرفعال استفاده می­شود. میدان­های سرعت و دما با حل عددی معادلات ناویر-استوکس و انرژی با استفاده از روش حجم محدود و با به‌کارگیری الگوریتم نمونه به‌دست می­آیند. اثرات عدد هارتمن  و غلظت نانو ذرات اکسید آلومینیوم  بر توزیع میدان­های دما و سرعت در داخل کانال و توزیع­های ضریب اصطکاک و عدد ناسلت روی دیوار پایینی کانال، به‌طور کامل مورد بحث و مطالعه قرار می­گیرند. نتایج این تحقیق به­خوبی نشان می­دهد که رفتارهای هیدرودینامیکی و حرارتی جریان به‌طور قابل توجه­ای وابسته به قدرت میدان مغناطیسی و درصد حجمی نانو ذرات اکسید آلومینیوم است. در حقیقت، بیشترین مقادیر ضریب اصطکاک و نرخ انتقال حرارت روی دیوار پایینی کانال مربوط به حالت  و  است.

کلیدواژه‌ها

عنوان مقاله [English]

Three-Dimensional Analysis of Forced Convection Fluid Flow in a Duct with Step Considering the Interacting Influences of the Magnetic Field and Solid Nanoparticles

نویسندگان [English]

  • Meysam Atashafrooz 1
  • Kazem Barchi Pour 2
  • Nasrin Aminizadeh 2
1 Mechanical Engineering Department Sirjan University of Technology
2 Mechanical Engineering Department, Sirjan University of Technology, Sirjan, Iran
چکیده [English]

In this research, interaction influences of magnetic field and solid nanoparticles on three-dimensional forced convection flow in a horizontal duct with an inclined backward-facing step are studied. The  nanofluid is considered as the working fluid in duct. The Blocked region method is applied to simulate the inclined backward-facing step in Cartesian coordinates. To obtain the velocity and temperature fields, the Navier-Stokes and energy equations are solved using the Finite volume method and SIMPLE algorithm. Influences of Hartmann number  and concentrations of  nanoparticles  on the velocity and temperature fields in duct and distributions of fiction coefficient and Nusselt number along the bottom wall of duct are analyzed with full details. Results of this research clearly show that the hydrodynamics and thermal behaviors of flow are considerably dependent on the magnetic field strength and volume fractions of  nanoparticles. In fact, the highest values of fiction coefficients and heat transfer rates on the bottom wall are related to the case of  and .

کلیدواژه‌ها [English]

  • Three-dimensional Convection flow
  • Magnetic Field
  • Nanofluid
  • Flow Separation
  • Inclined Backward-facing Step

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سابقه مقاله

  • تاریخ دریافت: 27 مهر 1399
  • تاریخ بازنگری: 15 آذر 1399
  • تاریخ پذیرش: 04 بهمن 1399
  • تاریخ انتشار: 01 تیر 1399

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