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Czasopismo Techniczne

An analysis of incoming wind pulsation on the wind erosion
processes on a hill

Data publikacji: 11.12.2015

Czasopismo Techniczne, 2015, Budownictwo Zeszyt 2-B (12) 2015, s. 273 - 280

https://doi.org/10.4467/2353737XCT.15.136.4173

Autorzy

Renata Gnatowska
Faculty of Mechanical Engineering and Computer Science, Czestochowa University of Technology, Poland
Wszystkie publikacje autora →

Tytuły

An analysis of incoming wind pulsation on the wind erosion
processes on a hill

Abstrakt

The present analysis undertakes the problem of surface wind over topography. The main focus is placed upon the effect of oncoming wind oscillations on the velocity field structure around a single sinusoidal shaped 2D hill. Additional effort has been undertaken to recognize the inflow gust influence on the surface shear stress related to the mechanism of wind induced erosion. Numerical simulations have been performed through the use of the phase-averaged form of RNG version of k-ɛ turbulence model. Experimental verification of numerical data has been done in wind tunnels equipped with devices generating unsteady wind boundary layers. The main findings of the simulations reveal: a strong dependence between the characteristics of inflow periodicity and the structure of vortices of the separation region; the mean position of the reattachment point; the phase averaged velocity field; skin friction variability downstream from the hill. The results have significant implications for the prediction of sand transport in unsteady winds.

Bibliografia

[1] Butterfield G.R., Transitional behaviour of salation: wind tunnel observation of unsteady winds, Journal of Arid Environments, Vol. 39, 1998, 377-394.

[2] Gnatowska R., Sikora S., Numerical analysis of wind flow and erosion in flow around the bump terrain, AIP Conference Proc. 1648, 850124, 2015.

[3] Jarża A., Ciechanowski J., Dynamics of separation zone behind the 2D hill in oscillating incident wind, Proc. XXI International Congress of Theoretical and Applied Mechanics, Poland, Warsaw 2004.

[4] Kim H.G., Lee Ch.M., Lim H.C., Kyong N.H., An experimental and numerical study on the flow over two-dimensional hills, Journal of Wind Engineering and Industrial Aerodynamics, Vol. 66, 1997, 17-33.

[5] Lee S.J., Lim H.-Ch., A numerical study on flow around a triangular prism located behind a porous fence, Fluid Dynamics Research, Vol. 28(3), 2001, 209-221.

[6] Zhang J., Cui E., Fu G., Investigation of the flow field and the starting conditions of wind-induced erosion of the railway embankment, Journal of Wind Engineering and Industrial Aerodynamics, Vol. 54/55, 1995, 573-581.

Informacje

Informacje: Czasopismo Techniczne, 2015, s. 273 - 280

Typ artykułu: Oryginalny artykuł naukowy

Tytuły:

Polski:

An analysis of incoming wind pulsation on the wind erosion
processes on a hill

Angielski:

An analysis of incoming wind pulsation on the wind erosion
processes on a hill

Autorzy

Faculty of Mechanical Engineering and Computer Science, Czestochowa University of Technology, Poland

Publikacja: 11.12.2015

Status artykułu: Otwarte __T_UNLOCK

Licencja: Żadna

Udział procentowy autorów:

Renata Gnatowska (Autor) - 100%

Korekty artykułu:

-

Języki publikacji:

Angielski

Liczba wyświetleń: 1624

Liczba pobrań: 775