کاربرد روش شبکه بولتزمن مبتنی بر اختلاف محدود برای شبیه سازی انتقال حرارت جابجایی مغشوش نانوسیال

نوع مقاله : مقاله مستقل

نویسندگان

1 استادیار، دانشکده مهندسی مکانیک، دانشگاه کاشان، کاشان

2 دانشجوی کارشناسی ارشد، دانشکده مهندسی مکانیک، دانشگاه کاشان، کاشان

3 دانشجوی دکتری، دانشکده مهندسی مکانیک، دانشگاه کاشان، کاشان

چکیده

در کار حاضر برای اولین بار با استفاده از روش شبکه بولتزمن مبتنی بر اختلاف - محدود انتقال حرارت جا‌به‌جایی مغشوش نانوسیال درون محفظه مربعی شکل و کانال شبیه سازی شده و تاثیر عوامل مختلف از جمله عدد رایلی، کسر حجمی نانوسیال و عدد رینولدز بررسی شده است. برای مدل‌سازی جریان مغشوش، از روش شبیه‌سازی گردابه‌های بزرگ استفاده شده است. جریان انتقال حرارت جابجایی طبیعی داخل حفره برای محدوده عدد رایلی 103 تا 1010 و محدوده کسر حجمی 0 تا 1 درصد بررسی شده است. جریان انتقال حرارت جابجایی اجباری داخل کانال برای محدوده عدد رینولدز 50 تا 3000 و محدوده کسر حجمی 0 تا 1 درصد بررسی شده است. نتایج نشان می‌دهد که روش شبکه بولتزمن مبتنی بر اختلاف - محدود توانایی شبیه سازی جریان‌های مغشوش را در هندسه‌های مختلف دارد. همچنین نتایج نشان می‌دهد در انتقال حرارت جابجایی آزاد داخل حفره با افزایش عدد رایلی و افزایش کسر حجمی نانوذرات، نرخ انتقال حرارت افزایش می‌یابد. در انتقال حرارت جابجایی اجباری داخل کانال، با افزایش عدد رینولدز و افزایش کسر حجمی نانوذرات نرخ انتقال حرارت افزایش می‌یابد.

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