بررسی تجربی انتقال گرمایی جابجایی اجباری فرو سیال〖Fe〗_3 O_4 در لوله‌ی U-شکل تحت میدان مغناطیسی نوسانی

نوع مقاله : پژوهشی کامل

نویسندگان

1 دانشجوی دکتری، گروه مهندسی مکانیک، واحد علوم و تحقیقات، دانشگاه آزاد اسلامی، تهران، ایران

2 استادیار، گروه مهندسی مکانیک، واحد علوم و تحقیقات، دانشگاه آزاد اسلامی، تهران، ایران

3 استاد، دانشکده مهندسی مکانیک، دانشگاه صنعتی شریف، تهران، ایران

4 استادیار، گروه مهندسی مکانیک، واحد شاهرود، دانشگاه آزاد اسلامی، شاهرود، ایران

چکیده

در این مقاله رفتار هیدرودینامیکی و حرارتی جریان فرو سیال Fe3O4 در یک لوله‌ی افقی U-شکل مسی بر روی یک سطح، تحت یک میدان مغناطیسی نوسانی به‌صورت تجربی بررسی‌شده است، جریان از طریق یک لوله U-شکل، تحت شرایط مرزی حرارتی لوله، با شار گرمایی یکنواخت که در بعضی از نقاط تحت تأثیر میدان مغناطیسی قرارگرفته است، در رینولدز پایین عبور می‌کند. هدف از این تحقیق بررسی تجربی اثر پارامترهای استفاده از نانو سیال، درصد حجمی نانو ذرات، اثر فرکانس در میدان مغناطیسی نوسانی و اثر میدان مغناطیسی ثابت در رفتار جریان در سه قسمت لوله مستقیم ورودی، قسمت انحنای لوله و قسمت لوله مستقیم خروجی بوده است. با تحلیل میزان درصد تأثیرگذاری هر یک از پارامترها در قسمت‌های مختلف، نتایج نشان می‌دهند که بیشترین تأثیر را میدان مغناطیسی نوسانی با افزایش فاکتور درصد حجمی نانو ذرات در قسمت لوله ورودی مستقیم به میزان %8/8 در فرکانس 50 هرتز داشته است.

کلیدواژه‌ها

موضوعات


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