کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7056898 1458066 2014 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Fluid flow and heat transfer across an elliptical hollow fiber membrane tube bank with randomly distributed features
ترجمه فارسی عنوان
جریان سیال و انتقال گرمایی در یک لوله غشای نازک فیبر خالی با ویژگی های به طور تصادفی توزیع شده
کلمات کلیدی
توزیع تصادفی لوله لوله بیضوی فیبر توخالی، جریان سیالات، انتقال گرما،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
چکیده انگلیسی
An elliptical hollow fiber membrane tube bank (EHFMTB) has better performances while being employed for air humidification. The EHFMTB is populated in a plastic shell to form a shell-and-tube heat exchanger like membrane contactor. The tube bank is always randomly populated in practical applications because of convenience and randomness in the manufacturing process. The fluid flow and heat transfer across a randomly distributed elliptical hollow fiber membrane tube bank (REHFMTB) are investigated. To disclose the influences of the fiber arrangements on the performances, three unit cells containing 20 fibers with different randomly distributions are selected as the calculating domains. A renormalization group k-ε (RNG KE) turbulence model with enhanced wall treatment is used for solving the equations governing the momentum and heat transports. The friction factor and Nusselt number across the REHFMTB under various fiber distributions, Reynolds numbers (Re), packing fractions (φ) and elliptical semiaxis ratios (b/a) are numerically obtained and experimentally validated. It is found that the comprehensive heat transfer performance is deteriorated for the fluid flow across the REHFMTB.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 76, September 2014, Pages 559-567
نویسندگان
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