تکامل تاریخی مدل‏سازی و شبیه‌سازی جریان‌های متلاطم در هیدرولیک

آب و توسعه پایدار

مقاله 6، دوره 5، شماره 2 - شماره پیاپی 11، اسفند 1397، صفحه 49-60   

نوع مقاله: مقاله علمی- ترویجی

شناسه دیجیتال (DOI): 10.22067/jwsd.v5i2.68927

نویسندگان

مائده اسکوهی؛ کاظم اسماعیلی^*

دانشگاه فردوسی مشهد

چکیده

در این پژوهش به بررسی روش ‏های مختلف شبیه‌سازی آشفتگی جریان پرداخته شده است. پس از مشخص نمودن ویژگی‌های اصلی آشفتگی و نقش آن در هیدرولیک، بررسی مختصری از روش‌های اصلی در محاسبات آشفتگی جریان هیدرولیکی ارائه شده است. این روش ‏ها عبارت است از: 1- روابط تجربی، 2- روش‌های حل معادلات ناویر-استوکس (RANS)، 3- شبیه‌سازی‌ عددی مستقیم (DNS) و 4- شبیه‌سازی گردابه‏ های بزرگ (LES). نظرات مختصر در مورد توسعه تاریخی روش ‏های مختلف ارائه‏ شده است. برای روش‏ های RANS ،DNS و LES برخی از نمونه‌های کاربردی ارائه شد که بیانگر توسعه مدل‏ های عددی در طی زمان می‏ باشد و پیشرفت شگرفی داشته است.

کلیدواژه‌ها

جریان آشفته؛ مدل‌سازی؛ روابط تجربی؛ مدل RANS؛ شبیه‌سازی عددی مستقیم؛ شبیه‌سازی گردابه های بزرگ

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