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اثر نوسان یک رشته ی الاستیک پشت استوانه صلب بر کاهش ضریب پسآ در جریان سیال تراکمناپذیر: روش مرز غوطه ور-شبکه بولتزمن-شبکه فنر | ||
مهندسی مکانیک دانشگاه تبریز | ||
مقاله 27، دوره 48، شماره 3، آبان 1397، صفحه 241-250 اصل مقاله (2.15 M) | ||
نوع مقاله: مقاله پژوهشی | ||
نویسندگان | ||
هادی گریوانی1؛ محسن نظری* 2؛ پوریا اکبرزاده2 | ||
1کارشناسی ارشد، گروه مهندسی مکانیک، دانشگاه صنعتی شاهرود، شاهرود، ایران | ||
2دانشیار، گروه مهندسی مکانیک، دانشگاه صنعتی شاهرود، شاهرود، ایران | ||
چکیده | ||
تحقیق حاضر یک حل عددی از تقابل سازهی الاستیک-سیال تراکم ناپذیر با استفاده از روش مرز غوطهور است، که در آن فاز جامد یک رشته الاستیک قرار گرفته پشت یک استوانه صلب در جریان سیال است. هدف، بررسی اثرات متقابل این رشته و استوانه بر یکدیگر و به طور خاص اثر رشته الاستیک بر کاهش ضریب پسآی استوانه است. در روش مرز غوطهور، فاز جامد و سیال در دو ناحیه مجاز از هم حل میشوند. برای حل جریان و مومنتوم فاز سیال از معادلات شبکه بولتزمن استفاده شده است. در تحقیق حاضر رشته الاستیک برخلاف تحقیقات گذشته بدون نیاز به حل معادلات ساختاری پیوسته جامد الاستیک، به صورت یک شبکه از جرم های متمرکز و المانهای فنر که میتواند خواصی چون مدول الاستیسیته و صلبیت خمشی رشته الاستیک را پوشش دهد، مدل شده و با روش مرز غوطهور با حل جریان مرتبط است. نتایج نشان داده است که جرم، هندسه و محل قرار گیری رشته پشت استوانه صلب، بر پایداری و کاهش ضریب پسآی آن اثر گذار است. اثبات وجود یک نقطه کمینه ضریب پسآ و تحلیل آن به عنوان دیگر زمینه تفاوت این تحقیق با تحلیلهای پیشین محسوب میشود. | ||
کلیدواژهها | ||
مرز غوطهور؛ شبکه بولتزمن؛ شبکه فنر؛ رشته الاستیک؛ استوانه صلب؛ ضریب پسآ | ||
مراجع | ||
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