کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1722103 1014712 2014 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A numerical study on dispersion of particles from the surface of a circular cylinder placed in a gas flow using discrete vortex method
ترجمه فارسی عنوان
یک مطالعه عددی در مورد پراکندگی ذرات از سطح سیلندر دایره ای که در جریان گاز با استفاده از روش گردابی گسسته
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی دریا (اقیانوس)
چکیده انگلیسی
The dispersion of particles emitted from the surface of a circular cylinder placed in a gas flow at the Reynolds number of 200 000 is numerically investigated using the discrete vortex method coupled with a Lagrangian approach for solid particle tracking. The wake vortex patterns, the temporal-spatial distributions and trajectories as well as the dispersion functions for particles with various Stokes numbers (St) ranging from 0.001 to 1.0 are obtained. The numerical results reveal that: (1) Solid particles on the cylinder surface are picked up and then transported away from the cylinder by the wake vortex flow. (2) Solid particles emitted from the cylinder surface always follow the vortices in the cylinder wake, and the response of particles to wake vortices is directly related to their Stokes numbers (particles with St=0.001, 0.0038, 0.01 can distribute both in the vortex core and around the vortex periphery, whereas those with St=0.1, 1.0 can not enter the vortex core and congregate mainly around the vortex periphery). (3) The particles move in rolling state in the wake region, and the dispersion intensity of particles in the lateral direction decreases remarkably as the Stokes number of particles is increased from 0.001 to 1.0.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hydrodynamics, Ser. B - Volume 26, Issue 3, 1 July 2014, Pages 384-393
نویسندگان
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