1. CFD simulation of the near-neutral atmospheric boundary layer
- Author
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Bino Maiheu, Yasin Toparlar, Gert Jan van Heijst, Bert Blocken, Building Physics, and Fluids and Flows
- Subjects
Technology ,Engineering, Civil ,Materials science ,010504 meteorology & atmospheric sciences ,Planetary boundary layer ,AIR-QUALITY ,POLLUTANT DISPERSION ,Reynolds stress ,Computational fluid dynamics ,MICROCLIMATIC ANALYSIS ,Vertical temperature profiles ,Mechanics ,01 natural sciences ,010305 fluids & plasmas ,ENERGY ,Physics::Fluid Dynamics ,Engineering ,0103 physical sciences ,Heat transfer ,Boundary value problem ,SDG 7 - Affordable and Clean Energy ,0105 earth and related environmental sciences ,Civil and Structural Engineering ,Horizontal homogeneity ,geography ,geography.geographical_feature_category ,Science & Technology ,Renewable Energy, Sustainability and the Environment ,Turbulence ,business.industry ,URBAN-ENVIRONMENT ,Atmospheric boundary layer (ABL) ,Mechanical Engineering ,WIND-DRIVEN-RAIN ,Inlet ,MODEL ,OUTDOOR THERMAL ENVIRONMENT ,Computational fluid dynamics (CFD) ,RADIATION ,NUMERICAL-SIMULATION ,business ,Reynolds-averaged Navier–Stokes equations ,SDG 7 – Betaalbare en schone energie - Abstract
© 2019 Accurate Computational Fluid Dynamics (CFD) simulations of Atmospheric Boundary Layer (ABL) flow are essential for a wide range of applications, including atmospheric heat and pollutant dispersion. An important requirement is that the imposed inlet boundary conditions should yield vertical profiles that maintain horizontal homogeneity (i.e. no streamwise gradients) in the upstream part of the computational domain for all relevant parameters, including temperature. Many previous studies imposed a uniform temperature profile at the inlet, which has often led to horizontal inhomogeneity of the temperature profile. This study presents a new temperature inlet profile that can yield horizontal homogeneity for neutral and near-neutral ABL conditions when used in combination with the Standard Gradient Diffusion Hypothesis (SGDH) and a temperature wall function. The horizontal homogeneity by this profile is verified by 2D Reynolds-Averaged Navier-Stokes (RANS) CFD simulations performed with the standard k-ε turbulence model and the SGDH. The approach in this paper can be extended to other types of wall functions and other RANS closure schemes for Reynolds stresses and turbulent heat fluxes. ispartof: JOURNAL OF WIND ENGINEERING AND INDUSTRIAL AERODYNAMICS vol:191 pages:91-102 status: published
- Published
- 2019