Assessment of Turbulence Characteristics for the Baghdad city
Keywords:Atmospheric Boundary layer, Turbulence,, Turbulent kinetic energy,, Momentum Flux, Turbulence intensity
In this paper, the turbulent kinetic energy (TKE) value was estimated and calculated as an
important indicator of turbulence. The directional distribution of the TKE value was observed for
different directions of the location. The relationship between variables of different turbulent
characteristics (e.g. Turbulence for horizontal wind velocity, Horizontal Momentum Flux MF, air
temperature and density) and kinetic energy induced by horizontal wind turbulence, has been tested. And
finding a mathematical formula describing this relationship.
The data recording process in the city of Baghdad continued for a whole month from 1/7/2016 to
31/7/2016 using fast-response wind velocity measuring instruments. The records included the three
components of wind velocity (u, v, w) and temperature and sound speed, recorded observations of the
times 3: 00.6: 00.9: 00.12: According to local time Baghdad. Also, air pressure was recorded on hourly
basis for the same day through the automatic weather station (Davis vantage pro 2).
H. A. Al-Shamary, " Characteristic of the Boundary layer above the Surface of Baghdad City and
Measuring the Mixing Length," Master thesis, Mustansiriyah University, Baghdad, Iraq, 2006.
R. Stull, " Practical Meteorology: An Algebra-based Survey of Atmospheric Science," Dep. t. of
Earth, Ocean & Atmospheric Sciences University of British Columbia, Vancouver, BC, Canada, 2015.
B. S. Roland, " An introduction to boundary layer meteorology," Boston: Kluwel’Academic
M. Yersel and R. Goble, " Roughness effects on urban turbulence parameter," Boundary-Layer
Meteorology, vol. 37, no.3, pp. 271-284, 1989.
C.S.B. Grimmond, " Aerodynamic roughness of urban areas derived from wind observations,"
Boundary-Layer Meteorology, vol.89, no.1, p.1-24, 1998.
C.S.B. Grimmond and T.R. Oke, " Aerodynamic properties of urban areas derived from analysis of
surface form," Journal of applied meteorology, vol.38, no.9, pp.1262-1292, 1999.
C.J. Bunker, "Effects of wind direction and speed on turbulence and wind shear," Doctoral
dissertation, Brigham Young University-Idaho, 2010.
F.Porté-Agel and Y.T.Wu C.H.Chen, "A numerical study of the effects of wind direction on turbine
wakes and power losses in a large wind farm, " Energies, vol.6, no.10, pp.5297-5313, 2013.
V.M.Kumer, et al., "Turbulent kinetic energy estimates from profiling wind LiDAR measurements
and their potential for wind energy applications," Renewable Energy, vol.99, pp.898-910, 2016.
D.A. Bohn, "Environmental effects on the speed of sound," In Audio Engineering Society
Convention 83. Audio Engineering Society, October 1987.
J.R. Holton, "An introduction to dynamic meteorology," Washington Elsevier, Fourth Edition.
Academic press , vol. 88, 2004.
A.G. Mutar, "Estimation of turbulence intensity for horizontal wind speed in Baghdad," engineering
and technology journal, vol. 31, pp.86-94, 2013.
The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to Journal of education for Pure Science (Jeds), University of Thi-Qar as publisher of the journal.
Copyright encompasses exclusive rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms and any other similar reproductions, as well as translations. The reproduction of any part of this journal, its storage in databases and its transmission by any form or media, such as electronic, electrostatic and mechanical copies, photocopies, recordings, magnetic media, etc. , will be allowed only with a written permission from Journal of education for Pure Science (Jeds), University of Thi-Qar.
Journal of education for Pure Science (Jeds), University of Thi-Qar, the Editors and the Advisory International Editorial Board make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in the Journal of education for Pure Science (Jeds), University of Thi-Qar are sole and exclusive responsibility of their respective authors and advertisers.