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Journal of Applied Fluid Mechanics، جلد ۵، شماره ۴، صفحات ۶۳-۷۰
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عنوان انگلیسی Effect of Different Near-Wall Treatments on Indoor Airflow Simulations
چکیده انگلیسی مقاله Airflow simulation results depend on a good prediction of near wall turbulence. In this paper a comparative study between different near wall treatments is presented. It is applied to two test cases in building: (1) the first concerns flow through a long corridor which is similar to that in a fully developed plane channel. Simulation results are compared to direct numerical simulation (DNS) data of Moser et al. (1999) for Reτ = 590 (where Reτ denotes the friction Reynolds number defined by friction velocity uτ , kinematics viscosity ν and the channel half-width δ); (2) the second case is a benchmark test for room air distribution. Simulation results are compared to experimental data obtained with laser-Doppler anemometry (Nielsen, 1990). Simulations were performed with the aid of CFD code Fluent (2005). Near wall treatments available in Fluent were tested: Standard Wall Functions, Non Equilibrium Wall Function and Enhanced Wall Treatment. In each case, suitable meshes with adequate position of the first near-wall node are needed. Results of near-wall mean stream wise velocity u+ and turbulent kinetic energy k+ profiles are presented, variables with the superscript of + are those non dimensional by the wall friction velocity uτ and the kinematic viscosity ν.
کلیدواژه‌های انگلیسی مقاله CFD, Airflow, Turbulence, simulation, Near, wall treatment, channel, Room
نویسندگان مقاله N. El Gharbi |
Center for Renewable Energy Development, Po. Box 62 Bouzareah 16340 Algiers, Algeria

R. Absi |
EBI, Inst. Polytech. St-Louis, PRES UPGO – Université Paris Grand Ouest, 32 Boulevard du Port, 95094, Cergy-Pontoise Cedex, France

A. Benzaoui |
University of Sciences and Technology Houari Boumediene(USTHB), Po. Box 32 El Alia Bab Ezzouar 16111 Algiers, Algeria

نشانی اینترنتی https://www.jafmonline.net/article_1347_fba34eee5dece952c38be25cec35dbed.pdf
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