انتقال حرارت جابجایی آزاد نانوسیال در محفظه L شکل بافلدار

نوع مقاله: مقاله مستقل

نویسندگان

1 دانشگاه آزاد اسلامی، واحد بوشهر،دانشجوی کارشناسی ارشد مکانیک، بوشهر، ایران

2 دانشگاه آزاد اسلامی، واحد مهدیشهر،استادیار گروه مکانیک، مهدیشهر، ایران

3 دانشگاه خلیج فارس، دانشکده مهندسی،استادیار گروه مکانیک، ایران

چکیده

در این مقاله انتقال حرارت جابجایی آزاد نانوسیال آب-آلومینا در محفظه L شکل بافلدار بصورت عددی بررسی شده است. معادلات حاکم به روش حجم محدود و با بکارگیری الگوریتم سیمپل حل شده است.دیواره های عمودی سمت چپ و پایینی محفظه گرم و دیواره میانی افقی و بافل سرد و سایر دیوارها عایق است. اثر پارمترهای مختلف مانند عدد رایلی، کسر حجمی ذرات، نسبت ابعاد محفظه و طول بافل بر میزان انتقال حرارت مورد بررسی قرار گرفته است. نتایج نشان می‌دهند حضور بافل بر افزایش میزان انتقال حرارت تاثیرگذار است. با افزایش عدد رایلی، کسر حجمی و نسبت ابعادی میزان انتقال حرارت افزایش می یابد. همچنین با افزایش نسبت ابعادی، نانوسیال تاثیر بیشتری بر افزایش عدد ناسلت دارد. همچنین تاثیرات کسر حجمی نانوسیال بر روی انتقال حرارت بحث و بررسی شده است. نتایج نشان دادند با افزایش کسر حجمی نانوسیال انتقال حرارت جابجایی آزاد در نسبتهای ابعادی مورد مطالعه افزایش خواهد یافت.

کلیدواژه‌ها

موضوعات


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