کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4994434 | 1458033 | 2017 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A numerical study on the migration of a neutrally buoyant particle in a Poiseuille flow with thermal convection
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The migration of a neutrally buoyant particle in a Poiseuille flow with thermal convection is investigated with the double-population lattice Boltzmann method. Compared with the isothermal case, the migration of the particle is notably affected by thermal convection. Five competing mechanisms are responsible for the lateral migration of the particle, i.e., wall repulsion due to lubrication, inertial lift related to shear slip, a lift due to particle rotation, a lift due to the curvature of the undisturbed velocity profile and a lift induced by thermal convection. Within the parameter range examined (Gr<2000,Rec<200), a critical Grashof number Grc is identified, beyond which the equilibrium position is insensitive to the initial position. Furthermore, a power law dependence of the critical Grashof number Grc on the channel Reynolds number Rec is discovered. In addition, with the channel Reynolds number Rec increasing, the forced flow relative to the particle is becoming stronger, leading to a declining effect of thermal convection.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 108, Part B, May 2017, Pages 2158-2168
Journal: International Journal of Heat and Mass Transfer - Volume 108, Part B, May 2017, Pages 2158-2168
نویسندگان
Junjie Hu, Zhaoli Guo,