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

نویسندگان

1 دانشگاه صنعتی سیرجان

2 موسسه آموزش عالی جاوید جیرفت

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

مراجع

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سابقه مقاله

  • تاریخ دریافت: 01 بهمن 1396
  • تاریخ بازنگری: 19 دی 1397
  • تاریخ پذیرش: 12 دی 1397

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