NDLI: Evaluation of the atmospheric RAMS model in an obstacle resolving configuration

Content Provider	Springer Nature Link
Author	Trini Castelli, Silvia Reisin, Tamir G.
Copyright Year	2010
Abstract	The Regional Atmospheric Modelling System (RAMS) was modified and configured to simulate the flow around a rectangular building, corresponding to Case A1-1 in the CEDVAL Project. This experiment was designed to provide a comprehensive compilation of wind tunnel datasets that can be used for validation of numerical flow and dispersion models. A Cartesian grid implemented in the RAMS model permitted the explicit description of the obstacle. The model grid resolution was of the order of 1 m, high enough to resolve the most significant flow characteristics. Two turbulence closures largely used at these scales, $${{\rm k}-\varepsilon}$$ and Renormalization Group $${{\rm k}-\varepsilon}$$ , were implemented in RAMS, tested and evaluated. Some preliminary tests were performed to investigate the effect of the boundary conditions on the flow behaviour at the obstacle walls. A simplified approach, assuming that the wind changes logarithmically in the ambient atmosphere near the building’s faces was implemented. Model results show that RAMS successfully reproduces the main flow characteristics. The performances of the different turbulence closures are discussed through a comparison with the observed data and a statistical analysis. A good agreement was obtained for the horizontal and vertical velocities, while the results for the turbulent kinetic energy are generally less satisfactory, especially above the obstacle’s height.
Starting Page	555
Ending Page	576
Page Count	22
File Format	PDF
ISSN	15677419
Journal	Environmental Fluid Mechanics
Volume Number	10
Issue Number	5
e-ISSN	15731510
Language	English
Publisher	Springer Netherlands
Publisher Date	2010-03-20
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Obstacles resolving model Atmospheric model Model evaluation Turbulence closures Oceanography Meteorology/Climatology Hydrogeology Mechanics Environmental Physics
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Water Science and Technology

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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