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شبیه سازی عددی دینامیک گلبول قرمز خون در یک میکروکانال با مانع پلهای با استفاده از روش شبکه بولتزمن- مرز غوطه ور | ||
مهندسی مکانیک دانشگاه تبریز | ||
مقاله 8، دوره 47، شماره 2 - شماره پیاپی 79، مرداد 1396، صفحه 69-77 اصل مقاله (1.11 M) | ||
نوع مقاله: مقاله پژوهشی | ||
نویسندگان | ||
عبدالرحمان دادوند* 1؛ اسعد علیزاده2 | ||
1استادیار، گروه مهندسی مکانیک، دانشگاه صنعتی ارومیه، ارومیه، ایران | ||
2دانشجوی کارشناسی ارشد، گروه مهندسی مکانیک، دانشگاه صنعتی ارومیه، ارومیه ایران | ||
چکیده | ||
در مطالعه حاضر، دینامیک یک گلبول قرمز در میکروکانال دوبعدی ساده و میکروکانال دارای مانع پلهای، با استفاده از ترکیب روش شبکه بولتزمن و روش مرز غوطهور شبیهسازی میگردد. گلبول قرمز به صورت یک مرز انعطافپذیر غوطهور در جریان سیال در نظر گرفته میشود. اثرات تغییر لزجت پلاسما بر حرکت و تغییر شکل گلبول قرمز بررسی شد. در ادامه حرکت گلبول قرمز دایروی در جریان پوازیه بررسی گردید. با توجه به این که گلبول در مرکز کانال قرار دارد و جریان متقارن محوری است بین نیروهای برآی عمل کننده از بالا و پایین روی گلبول، تعادل برقرار است. با عبور دادن گلبول از یک مانع پلهای در دو حالت گلبول طبیعی و گلبول با تغییر شکل پذیری پایین، مشاهده شد که گلبول طبیعی سرعت و تغییر شکل بیشتری دارد. به علاوه، به دلیل ضرایب کششی و خمشی پایینتر، گلبول طبیعی حرکت tank-treading را تجربه میکند در حالی که برای گلبول با تغییر شکلپذیری کم، حرکت tumbling اتفاق میافتد. نتایج حاصل با نتایج عددی موجود مقایسه گردید که تطابق نسبتاً خوبی را نشان داد. | ||
کلیدواژهها | ||
روش شبکه بولتزمن؛ روش مرز غوطه ور؛ گلبول قرمز خون؛ اندرکنش؛ میکروکانال با مانع پله ای | ||
مراجع | ||
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