Study of natural convection from cylindrical surfaces embedded in porous media by LDCT

(2004) Study of natural convection from cylindrical surfaces embedded in porous media by LDCT. Masters thesis, King Fahd University of Petroleum and Minerals.

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Arabic Abstract

لقد تم قياس معاملات انتقال الكتلة للحمل الطبيعي من اسطوانات عمودية ذات تغير في نسب حالات جوانبها ومغمورة في سطح مسامي مشبع ، قيست باستخدام تقنية تيار الانتشار المحدود LDCT . الوسط المسامي يتشكل من كرات زجاجية معبئة عشوائياً وذات أحجام مختلفة . والبيانات التي حصل عليها ، تمت مقارنتها بمحددات أرقام كل من رقم شروود المعدل Sh*L ، ورقم رالاه المعدل Ra*L ، ورقم دارسي DaL .

English Abstract

Natural convective mass transfer coeeficients from vertical cylinders of varying aspect ratio, embedded in saturated porous media, were measured using limiting diffusion current technique (LDCT). Randomly packed glass spheres of different size formed the porous media. The obtained data are correlated in terms of modified Sherwood (Sh*L), modified Rayleigh number (Ra*L) and Darcy numbers (DaL). For cylinders embedded in porous media, the mass transfer coefficients can be estimated using the following: Sh*L = 3.29(Ra*L)⁰.²⁶ *[1 +0.6L(Ra*L)⁻⁰.⁵] in the range 6x10⁴ ---- ---- DaL R <6.1x10>⁶ and 1.40x10⁻⁶ <1.02 x 10³.

Item Type: Thesis (Masters)
Subjects: Chemical Engineering
Divisions: College Of Engineering Sciences > Chemical Engineering Dept
Committee Advisor: Rahman, Mushfiqur
Committee Members: Abulhamayel, Mohammed and Redhwi, H. H. and Al-Baghli, Nadhir A. and Al-Odan, Maher
Depositing User: Mr. Admin Admin
Date Deposited: 22 Jun 2008 16:56
Last Modified: 01 Nov 2019 16:56
URI: http://eprints.kfupm.edu.sa/id/eprint/10082