مطالعه تولید آنتروپی و ارزیابی خواص آماری انتقال حرارت در جریان مغشوش

نوع مقاله : مقاله پژوهشی

نویسندگان

دانشگاه زابل

چکیده

در این مقاله، اثر قطر نانو ذرات در انتقال حرارت جابجایی اجباری جریان مغشوش سیال نانوی آب/ اکسید آلومینیوم درون یک لوله دایره‌ای شکل تحت شار حرارتی یکنواخت در دیواره با استفاده از مدل مخلوط دوفازی بصورت عددی بررسی و تحلیل آماری شده است. کسر حجمی نانوذرات برابر 3 درصد، عدد رینولدز برابر 104×5 و تغییرات قطر نانوذرات در محدوده 20 تا 110 نانومتر فرض شده است. در تحلیل آماری از توابع توزیع احتمال پیوسته نظیر؛ گاما، نرمال، لوگ نرمال، گامبل، وایبول و فسچر استفاده گردیده است. پس از بررسی نتایج مشخص شد که با افزایش قطر ذرات نانو عدد ناسلت کاهش و این پارامتر با توجه به تغییرات قطر نانوذرات از تابع توزیع احتمال فسچر پیروی نموده است.

کلیدواژه‌ها


عنوان مقاله [English]

Study of entropy generation and evaluation statistical heat transfer properties in turbulent flow

نویسندگان [English]

  • Farhad Vahidinia
  • Mohadeseh Miri
  • Behrooz Keshtegar
University of Zabol
چکیده [English]

In this paper, effect of the nanoparticles diameter on the forced convection heat transfer of turbulent flow of Al2O3-water nanofluids in a circular tube under constant heat flux on the wall using of two phase mixture model numerically investigated and was statistical analysis. The Volume fraction of nanoparticles is %3, the Reynolds number is 5×104 and the variation of diameter of nanoparticles is assumed in the range of 20- 110nm. In the statistical analysis, from the continuous probability distribution functions such as Gamma, Normal, Lognormal, Gumbel, Weibull and Frechet were used. After reviewing the results, it was found that by increasing the diameter of nanoparticles, the Nusselt number is reduced and this parameter due to changes in the nanoparticles of diameter has followed of the Frechet probability distribution function.

کلیدواژه‌ها [English]

  • Nanofluid
  • Convection heat transfer
  • nanoparticles diameter
  • Nusselt Number
  • Probability density function
  • Statistical properties
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