مطالعه جریان سیال و انتقال حرارت مرکب برای نانوسیال محبوس در فضای بین استوانه های هم-مرکز/ نا هم‌مرکز دوار

نوع مقاله : مقاله مستقل

نویسندگان

1 کارشناسی ارشد مهندسی مکانیک، دانشگاه ولی عصر رفسنجان، ایران

2 استادیار گروه مهندسی مکانیک، دانشگاه ولی عصر رفسنجان، ایران

3 کارشناسی مهندسی مکانیک، دانشگاه ولی عصر رفسنجان، ایران

4 دانشیار گروه مهندسی مکانیک، دانشگاه ولی عصر رفسنجان، ایران

چکیده

بهبود خواص سیالات همواره مورد توجه صنایع و نیروگاه‌ها بوده و امروزه افزودن نانو ذرات به سیالات به عنوان یکی از راه‌های موثر معرفی شده است. از این رو در سال‌های اخیر دانشمندان توجه خود را معطوف به یافتن خواص و رفتار منحصر به فرد نانوسیالات کرده‌اند. لذا در این پژوهش به بررسی عددی تاثیر پارمتر‌های رینولدز و رایلی بر روی جریان و انتقال حرارت (توام جابه‌جایی آزاد و اجباری ) نانوسیال محبوس در فضای بین دو استوانه هم‌مرکز / غیر هم‌مرکز دوار در حالت افقی به طول بی‌نهایت که در دو دمای متفاوت نگه داشته شده‌اند پرداخته شده است. نتایج نشان می‌دهند که رابطه بین پارامتر‌های اعداد رینولدز و رایلی با میزان انتقال حرارت به ترتیب غیر‌مستقیم و مستقیم می‌باشد. افزایش عدد رایلی باعث غیر یکنواخت شدن خطوط جریان و هم‌دما می‌شود و افزایش انتقال حرارت در دیواره‌ها را به همراه دارد. بیشترین انتقال حرارت مربوط به حالت دو فازی استوانه‌های غیر هم‌مرکز بدست آمد.

کلیدواژه‌ها

موضوعات


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