بررسی روش‌های شبیه‌سازی CFD مخازن همزن‌دار دوفازی گاز-مایع

نوع مقاله : علمی پژوهشی

نویسنده

استادیار، دانشکده مهندسی شیمی، نفت و گاز، دانشگاه سمنان، سمنان

چکیده

تعداد زیادی از واکنش‌های موجود در صنایع شیمیایی مانند فرآیندهای اکسیداسیون، هیدروژناسیون و بیولوژیکی در محیط‌های دو فازی گاز-مایع و توسط مخازن همزن‌دار انجام می‌شوند. در این محیط‌ها به کمک فرآیند اختلاط، فاز گاز به صورت حباب‌هایی در فاز مایع پراکنده می‌شود تا سطح انتقال جرم مواد بین فاز گاز و مایع برای انجام واکنش‌های شیمیایی افزایش یافته و در نتیجه بازدهی راکتور افزایش پیدا کند. با توجه به اهمیت رفتار هیدرودینامیکی راکتورهای همزن‌دار دوفازی گاز-مایع بر میزان پراکندگی فاز گاز در فاز مایع و تأثیر آن بر بازدهی فرآیند، شبیه‌سازی CFD به عنوان راهکاری مؤثر برای بررسی عملکرد مخازن همزن‌دار به طور گسترده توسط محققین مورد استفاده قرار گرفته است. در این پژوهش، با بررسی مدل‌های ارائه‌شده در زمینه شبیه‌سازی CFD مخزن همزن‌دار، پرکاربردترین مدل‌های مورد استفاده در شبیه‌سازی رفتار جریان مغشوش، نحوه مدل‌سازی پره در مخزن و همچنین مدل‌های پیش‌بینی رفتار چند فازی در شبیه‌سازی‌های CFD مخازن همزن‌دار معرفی گردیده و ویژگی‌های آن‌ها مورد بحث و بررسی قرار گرفته است.

کلیدواژه‌ها


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