کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4994810 1458036 2017 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Forced convective heat transfer of nanofluids around a circular bluff body with the effects of slip velocity using a multi-phase mixture model
ترجمه فارسی عنوان
انتقال گرمای کانوایی اجباری از نانوسیالها در اطراف یک محفظه دایره ای با اثرات سرعت لغزش با استفاده از مدل مخلوط چند فاز
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
چکیده انگلیسی
Forced convective heat transfer around a circular cylinder using nanofluids has been numerically analyzed employing a mixture model based Multi-Phase Modeling (MPM) approach. A hot circular cylinder with a constant wall temperature is exposed to a free stream of Al2O3-H2O nanofluid at ambient temperature. The flow is steady, laminar and two dimensional in the Reynolds number range of 10⩽Re⩽40. The governing equations of flow and energy transfer along with the respective boundary conditions are numerically solved using a Finite Volume Method (FVM) based on SIMPLE algorithm. The prime aim of this work is to highlight the effects of slip velocity, volume concentration and diameter of nanoparticles on heat transfer characteristics of nanofluids. Results indicate that heat transfer increases with increase in nanoparticle volume fraction. The highest mean Nusselt number is observed at ϕ=5% at any Reynolds number. It is also noted that, nanofluids with smaller nanoparticles result in higher heat transfer rates. Particular attention has been paid to the variation of heat transfer characteristics when the modeling approach is switched from Single-Phase Modeling (SPM) to mixture model based MPM. It is revealed that higher heat transfer rates are observed in MPM which considers the effects of slip velocity.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 106, March 2017, Pages 816-828
نویسندگان
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