کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4993575 | 1458031 | 2017 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Spatially resolved mass transfer coefficient for moderate Reynolds number flows in packed beds: Wall effects
ترجمه فارسی عنوان
ضریب انتقال جرمی برای حل معادلات رینولدز متوسط در تخت بسته بندی شده: اثرات دیوار
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
چکیده انگلیسی
In this paper, Direct Numerical Simulation (DNS) was performed to understand the effects of confining walls on mass transfer through a packed bed for laminar regime (Re â¤Â 100). The X, Y and Z coordinates of the center of the spheres in a randomly packed bed with varying ratios D/d (D is the diameter of the column and d is the diameter of the particle) were generated using a Discrete Element Method - Computational Fluid Dynamics (DEM-CFD) code. Naphthalene-air system (Sc â¼Â 2.52) was considered for all the cases. The grid resolution, method and boundary conditions were validated by comparing the computed (overall) Sherwood number with the published experimental data. Local Sherwood number was computed around each particle for all ratios, D/d, and spatial and probability distributions throughout the packed bed column as a function of D/d are reported. It was observed that for D/d's â¤Â 8.6, the effects of wall on particle's Sherwood number was evident, while for D/d's â¥Â 10.8, the Sherwood number was predominantly uniform all through the column.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 110, July 2017, Pages 406-415
Journal: International Journal of Heat and Mass Transfer - Volume 110, July 2017, Pages 406-415
نویسندگان
Shivkumar Bale, Mayur Sathe, Oladapo Ayeni, Abdallah S. Berrouk, Jyeshtharaj Joshi, Krishnaswamy Nandakumar,