کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4993522 1458026 2017 14 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Numerical modeling and simulation of particulate fouling of structured heat transfer surfaces using a multiphase Euler-Lagrange approach
ترجمه فارسی عنوان
مدل سازی عددی و شبیه سازی ذرات ریخته گری سطوح انتقال حرارت ساختار با استفاده از روش یولر-لاگرانژ چند مرحلهای
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
چکیده انگلیسی
A CFD-based multiphase method for the numerical modeling and simulation of particulate fouling of structured heat transfer surfaces is presented and validated using different benchmarks (turbulent particle-laden backward-facing step and channel flow) available in the literature. The proposed procedure is based on a coupling of the Lagrangian-Particle-Tracking (LPT) and Eulerian approach. Therefore, suspended particles are simulated according to their natural behavior by means of LPT as solid spherical particles, whereas the carrier phase is simulated using the Eulerian approach. Large eddy simulations (LES) are performed for fully developed turbulent channel flows at Reτ=395 with selected structured surfaces (single square cavity or spherical dimple) considering a depth/diameter ratio of t/D=0.26 and foulant particle mass loading ratios up to β=ṁp/ṁf=2×10-3 using a dynamic one equation eddy-viscosity turbulence model. These simulations demonstrate the great capabilities of the proposed method and reveal a slightly better fouling performance and thermo-hydraulic efficiency of the spherical dimple, due to the existence of asymmetric vortex structures compared to the square cavity.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 115, Part A, December 2017, Pages 932-945
نویسندگان
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