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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-24 9:33 |
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Conference: Bucharest University Faculty of Physics 2011 Meeting
Section: Atmosphere and Earth Science; Environment Protection
Title:
Equilibrium Turbulent Flow under Pressure gradient in a Neutral Atmospheric Surface Boundary Layer
Authors:
Simona Talpos
Affiliation:
University of Bucharest, Faculty of Physics, P.O.BOX MG-1, Magurele, Bucharest, Romania
E-mail
stalpos@yahoo.com
Keywords:
Atmosferic Boundary Layer, flux model,wind`s profile
Abstract:
The most common model for the neutral atmospheric boundary layer is the constant flux model. This model assumes quasi-stationary flow in the surface layer and neglects the pressure gradient force. To close the motion equation are used different semi-empirical, statistical or similitude theories for the turbulent fluxes. Assuming an equilibrium turbulent flow and the presence of the pressure gradient force, the motion equation for a turbulent flow and the equation of turbulent kinetic energy become closed. Solving these equations under these assumptions result the logarithmic profile of the wind speed specific for the neutral turbulent surface layer, the rugosity length and a theoretical value for von Karman constant of 0,5.
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