مقایسه اندرکنش همسایه وار دو ذره دایروی صلب و تغییر شکل پذیر در جریان برشی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشگاه شاهرود

2 هیات علمی

3 استاد دانشگاه شاهرود

چکیده

در این مطالعه، تقابل سازه و سیال در جریان برشی با استفاده از روش ترکیبی مرز غوطه­ور – شبکه بولتزمن – شبکه فنر مورد مطالعه قرار گرفته است. در این روش ترکیبی، با اضافه کردن الگوریتم اعمال نیروی چند مرحله­ای به معادلات شبکه بولتزمن دقت محاسبات را تا دو برابر افزایش دادیم. مرز غوطه­ور که به عنوان یکی از روش­های شبکه ثابت شناخته می­شود، جهت محاسبه­ نیروی مرزی به کار گرفته می­شود. در این مطالعه، جهت اعمال تغییر شکل سازه تغییرشکل‌پذیر در برابر سیال اطرافش، از روش شبکه فنر استفاده شده است که بر مبنای این روش جسم جامد با مجموعه­ای از فنرها جایگزین می­شود. در بخش روش‌های عددی این مقاله، الگوریتمی ضمنی منطبق بر روش شبکه فنر ارائه شده که به راحتی می­تواند با با حلگرهای جریان ترکیب شده و باعث ارتقا روش‌های صریح قبلی شود. صحت حلگرهای جسم جامد و سیال به ترتیب با شبیه سازی تغییرشکل تیر یکسرگیدار و حرکت تک­ذره صلب دایروی داخل جریان برشی نشان داده می­شود. در بخش نتایج نیز حرکت همسایه­وار دو ذره دایروی در جریان برشی برای دو حالت جسم صلب و تغییرشکل پذیر با هم مقایسه می‌شود که نشان داده خواهد شد انعطاف­پذیری جسم جامد چگونه باعث تغییر در مسیر حرکت ذرات خواهد شد.

کلیدواژه‌ها

موضوعات


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