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Large eddy simulations of translation and surface roughness effects on tornado-like vortices
Abstract The effects of translation and surface roughness on tornado-like vortices were studied using Large Eddy Simulation (LES) of a laboratory scale tornado. The translation was simulated by employing a moving-wall boundary condition and surface roughness was introduced by physical modeling of roughness element blocks. For lower swirl ratios the translation reduces the maximum mean tangential velocity whereas for high swirl ratios it causes a slight increase in the maximum mean tangential velocity. The introduction of surface roughness causes an overall effect similar to reducing the swirl ratio.
Highlights ► This paper presents Large Eddy Simulation of a laboratory scale tornado. ► The effects of translation and surface roughness are investigated. ► Observed flow characteristics are described.
Large eddy simulations of translation and surface roughness effects on tornado-like vortices
Abstract The effects of translation and surface roughness on tornado-like vortices were studied using Large Eddy Simulation (LES) of a laboratory scale tornado. The translation was simulated by employing a moving-wall boundary condition and surface roughness was introduced by physical modeling of roughness element blocks. For lower swirl ratios the translation reduces the maximum mean tangential velocity whereas for high swirl ratios it causes a slight increase in the maximum mean tangential velocity. The introduction of surface roughness causes an overall effect similar to reducing the swirl ratio.
Highlights ► This paper presents Large Eddy Simulation of a laboratory scale tornado. ► The effects of translation and surface roughness are investigated. ► Observed flow characteristics are described.
Large eddy simulations of translation and surface roughness effects on tornado-like vortices
Natarajan, Diwakar (author) / Hangan, Horia (author)
Journal of Wind Engineering and Industrial Aerodynamics ; 104-106 ; 577-584
2012-01-01
8 pages
Article (Journal)
Electronic Resource
English
Large eddy simulations of translation and surface roughness effects on tornado-like vortices
| Online Contents | 2012
Experimental investigation of large-scale tornado-like vortices
| Elsevier | 2020