حل تشابهی جریان سکون متقارن محوری نانوسیال برروی محور استوانه‌ای چرخان

نوع مقاله : مقاله پژوهشی

نویسنده

دانشگاه آزاد اسلامی واحد شاهرود

چکیده

در این مقاله جریان سکون شعاعیِ نانوسیال، برروی یک استوانۀ نامحدود به‌صورت پایا مورد بررسی قرار گرفته است. جریان آزاد نیز پایا است و قدرت اولیۀ جریان می‌باشد و محور باسرعت زاویه‌ای ثابت در حال چرخش است. حل تشابهی معادلات ناویراستوکس و معادلۀ انرژی در این تحقیق ارائه شده است. این معادلات، بااستفاده از تبدیلات مناسبی که در این تحقیق معرفی شده است ساده‌سازی شده‌اند. برای همۀ اعداد رینولدز، با افزایش کسر حجمی، مؤلفه‌های شعاعی و محوری میدان سرعت و نیز مؤلفۀ محوری تنش برشی کاهش می‌یابد و درمقابل، مؤلفه‌های زاویه‌ای میدان سرعت، مؤلفۀ زاویه‌ای تنش برشی و عدد ناسلت جریان افزایش می‌یابد.

کلیدواژه‌ها


عنوان مقاله [English]

Similarity Solution of Axisymmetric Stagnation Point Flow of Nanofluid on Rotating Cylinder

نویسنده [English]

  • Hamid Mohammadiun
Islamic Azad University of Shahrood
چکیده [English]

In this paper the steady state radial stagnation point flow impinging on an infinite cylinder has been investigated. The impinging free stream is steady with a constant strain rate and axis is rotating with constant angular velocity. Similarity solution of the Navier-Stokes and energy equations is presented in this research. A reduced from of these equations are obtained by using appropriate transformations introduced in this study. For all Reynolds numbers, as the particle fraction increases, fluid velocity component in radial and axial directions and axial component of shear-stresses decrease and in the contrary the angular component of shear stress and velocity field and Nusselt number increase.

کلیدواژه‌ها [English]

  • Nanofluid
  • Stagnation point flow
  • Heat transfer
  • Similarity Solution
  • Particle fraction
  • Constant angular velocity
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