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آتش افروز, میثم, بدخشان, سجاد. (1397). آنالیز سه بعدی جریان جابجایی نانوسیال در یک کانال دارای انقباض ناگهانی. پدافند الکترونیکی و سایبری, 7(2), 59-72.
میثم آتش افروز; سجاد بدخشان. "آنالیز سه بعدی جریان جابجایی نانوسیال در یک کانال دارای انقباض ناگهانی". پدافند الکترونیکی و سایبری, 7, 2, 1397, 59-72.
آتش افروز, میثم, بدخشان, سجاد. (1397). 'آنالیز سه بعدی جریان جابجایی نانوسیال در یک کانال دارای انقباض ناگهانی', پدافند الکترونیکی و سایبری, 7(2), pp. 59-72.
آتش افروز, میثم, بدخشان, سجاد. آنالیز سه بعدی جریان جابجایی نانوسیال در یک کانال دارای انقباض ناگهانی. پدافند الکترونیکی و سایبری, 1397; 7(2): 59-72.

آنالیز سه بعدی جریان جابجایی نانوسیال در یک کانال دارای انقباض ناگهانی

مکانیک سیالات و آیرودینامیک
مقاله 5، دوره 7، شماره 2 - شماره پیاپی 22، اسفند 1397، صفحه 59-72    اصل مقاله (1.01 M)
نویسندگان
میثم آتش افروز* 1؛ سجاد بدخشان2
1دانشگاه صنعتی سیرجان
2موسسه آموزش عالی جاوید جیرفت
تاریخ دریافت: 01 بهمن 1396،  تاریخ بازنگری: 19 دی 1397،  تاریخ پذیرش: 12 دی 1397 
چکیده
در این تحقیق، تاثیر درصد حجمی نانو ذرات جامد نقره بر رفتارهای هیدرودینامیکی و حرارتی جریان جابجایی آرام در یک کانال سه­بعدی و دارای انقباض ناگهانی، مورد مطالعه و بررسی قرار گرفته­اند. انقباض موجود درکانال به­وسیله یک پله پیشرو شیب­دار ایجاد می­شود. برای شبیه­سازی این پله در داخل کانال، از روش مسدود شده در سیستم مختصات کارتزین سه­بعدی استفاده می­شود. معادلات حاکم بر جریان که شامل معادلات بقای جرم، اندازه حرکت و انرژی است، ابتدا بی­بعد و سپس با استفاده از روش­های دینامیک سیالات محاسباتی و با بکارگیری الگوریتم سیمپل حل  می­شوند. برای بررسی تأثیر عملکرد درصد حجمی ذارت نانو، توزیع میدان­های سرعت، دما، ضریب اصطکاک، عدد ناسلت و دمای متوسط مخلوط به­صورت نموداری برای شرایط مختلف ارائه شده­اند. نتایج این تحقیق نشان می‌دهد که درصد حجمی نانو ذرات نقره به­طور قابل ملاحظه و    چشم­گیری بر رفتارهای حرارتی و هیدرودینامیکی جریان تأثیر می­گذارد.
کلیدواژه‌ها
انقباض ناگهانی؛ ذرات نانو؛ نقره-آب؛ نانو سیال؛ پله پیشرو
عنوان مقاله [English]
Three-dimensional Analysis of the Convective Nanofluid Flow in a Duct with Abrupt Contraction
نویسندگان [English]
meysam atash afroz1؛ sajad badakhshan2
1sirjan
2javid jiroft
چکیده [English]
In this research, the effects of Ag-nanoparticles, volume fraction on the hydrodynamic and thermal behaviors of convective flow in a three-dimensional duct with abrupt contraction are studied. The abrupt contraction is created by an inclined forward facing step. The blocked-off method is used to simulate the inclined surfaces of the step. The set of non-dimensional governing equations, consisting continuity, momentum, and energy were solved numerically by CFD techniques and SIMPLE algorithm. To investigate the influences of nanoparticle´s volume fraction, distributions of temperature, velocity, friction coefficient, Nusselt number, and mean bulk temperature were presented graphically. Our numerical results show that the Ag-nanoparticles volume fraction has significant effects on thermal and hydrodynamical behaviors of the flow.
کلیدواژه‌ها [English]
Abrupt Contraction, Nanoparticles, Ag-Water, Nanofluid, Forward Step
مراجع
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