کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
655732 1457665 2009 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Derivation of jump conditions for the turbulence k−ϵk−ϵ model at a fluid/porous interface
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
Derivation of jump conditions for the turbulence k−ϵk−ϵ model at a fluid/porous interface
چکیده انگلیسی

The boundary conditions that must be imposed at a fluid/porous interface for the turbulence k-ϵk-ϵ model is investigated in a two-step up-scaling framework, already introduced to study the laminar case [Chandesris, M., Jamet, D., 2006. Boundary conditions at a planar fluid–porous interface for a Poiseuille flow. Int. J. Heat Mass Transfer 49, 2137–2150]. The form of the momentum, 〈k〉〈k〉 and 〈ϵ〉〈ϵ〉 fluxes jump conditions are derived using a surface-excess theory of interfacial transport processes. These jump conditions are related to surface-excess quantities. These excess quantities are evaluated for a particular geometry of the porous medium for which DNS results are available [Breugem, W.P., Boersma, B.J., 2005. Direct numerical simulations of turbulent flow over a permeable wall using a direct and a continuum approach. Phys. Fluids 17 (2), 025103]. A very good agreement is obtained between the k-ϵk-ϵ model and the DNS results. The study of this particular configuration also allows to show for the first time the validity of the macroscopic turbulent viscosity modeling for flows in porous media.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Fluid Flow - Volume 30, Issue 2, April 2009, Pages 306–318
نویسندگان
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