بررسی تولید آنتروپی درجریان سکون متقارن محوری نانوسیال بر روی استوانه بادمای دیواره ثابت

نوع مقاله: مقاله علمی پژوهشی

نویسندگان

1 آزاد اسلامی واحد شاهرود*مهندسی مکانیک

2 گروه مکانیک، دانشکده فنی مهندسی، دانشگاه آزاد اسلامی واحد شاهرود

3 باشگاه پژوهشگران جوان و نخبگان دانشگاه آزاد اسلامی واحد شاهرود

4 گروه ریاضی، دانشکده ریاضی دانشگاه صنعتی شاهرود

چکیده

در تحقیق حاضر، دمای بی بعد، انتقال حرارت جابجایی و تولید آنتروپی در جریان سکون شعاعی نانو سیال بر روی استوانه نامحدود، در حالت‌پایا بررسی‌شده است. جریان آزاد نیز پایا بوده و قدرت اولیه جریان  می‌باشد. حل تشابهی معادلات ناویر استوکس و معادله انرژی ارائه ‌شده است. این معادلات، با استفاده از تبدیلات مناسبی که در این تحقیق معرفی شده است ساده سازی شده اند. معادلات در شرایطی حل‌شده‌اند که  دمای دیواره استوانه ثابت است. کلیه حل‌های فوق برای اعداد رینولدز  بین0.1 تا 1000 و مقادیرمعینی ازکسر حجمی نانو ذرات ارائه‌شده است که در آنها a شعاع استوانه و uf لزجت سینماتیکی سیال پایه است. نتایج نشان می‌دهند برای همه اعداد رینولدز، با افزایش کسر حجمی نانو ذرات، مو لفه های شعاعی و محوری میدان سرعت و تنش برشی کاهش می‌یابد درحالی‌که ضریب انتقال حرارت و عدد ناسلت افزایش می‌یابد همچنین بیشترین مقدار آنتروپی تولیدشده محاسبه است

کلیدواژه‌ها

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