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作者:V. Hamza , C. A. Babu , T. P. Sabin
来源:[J].Advances in Atmospheric Sciences(IF 1.338), 2007, Vol.24 (4), pp.631-643Springer
摘要:... Spatial variations in the surface wind, frictional velocity, roughness parameter and drag coefficient for the different seasons were studied. The surface wind was strong during the southwest monsoon season due to the modulation induced by the Low Level Jetstream. The drag c...
作者:M . Das , S . De , J . Chattopadhyay ...
来源:[J].Terrestrial, Atmospheric and Oceanic Sciences(IF 0.705), 2005, Vol.16 (1), pp.155-176Airiti
摘要:During the monsoon period of the year 1990, a micrometeorological tower of 30 m in height was erected at Jodhpur, India, as a part of the multi-institutional field experiment MONTBLEX'90. Various sensors were mounted in the tower to capture different meteorological phenomeno...
作者:Chun Xin Zhong
来源:[J].Applied Mechanics and Materials, 2011, Vol.1366, pp.1478-1483Trans Tech
摘要:... It is important to study the critical flow conditions, including bed shear stress, scour duration and frictional velocity etc, causing damage of grass-covered revetment. Laboratory experiments prove that, destruction of turf can be estimated by observing the variation of wate...
作者:Ashish Kumar , Srijna Singh , Neelanchali Asija Bhalla
来源:[J].Vibroengineering PROCEDIA, 2019, Vol.29, pp.153-158JVE
摘要:... The skin friction coefficient, wall shear stress and frictional velocity are also calculated.
作者:P.R. Jayakrishnan , C.A. Babu , Sivaprasad P.
来源:[J].Journal of Atmospheric and Solar-Terrestrial Physics(IF 1.417), 2013, Vol.94, pp.49-53Elsevier
摘要:... The surface boundary layer parameters that are computed using the sonic anemometer data during the period are momentum flux, sensible heat flux, turbulent kinetic energy, frictional velocity ( u ⁎ ), variance of temperature, variances of u, v and w wind. In order to com...
作者:Andy T. Chan
来源:[J].International Journal of Engineering Science(IF 1.691), 2001, Vol.39 (17), pp.2001-2014Elsevier
摘要:... Closed form solutions are obtained describing the entire flow development and the characteristics of the wind velocity, surface stress changes and frictional velocity changes. It is found that as the wind flows past the roughness discontinuity, the flow adapts to the new surf...
作者:KeJie Zhan , ShiZeng Liu , ZiHui Yang ...
来源:[J].Aeolian Research(IF 2.52), 2017, Vol.25, pp.79-86Elsevier
摘要:... We show that as dust storms progressed through the desert into the oasis, variation in the character of the underlying land surface not only influenced the wind profile by modifying the frictional velocity of air (U ∗ ), aerodynamic roughness length (Z 0 ), horizontal s...
作者:T. Fernández-Montblanc , A. Izquierdo , R. Quinn ...
来源:[J].Ocean Engineering(IF 1.161), 2018, Vol.163, pp.232-250Elsevier
摘要:... The relative importance and seasonal variation in hydrodynamic processes were investigated (flow velocity increase, coherent structures and vortex shedding, turbulence and steady current induced by the non linearity of waves). Results demonstrate that frictional velocity and ...
作者:Kyle D. Maurer , Brady S. Hardiman , Christoph S. Vogel ...
来源:[J].Agricultural and Forest Meteorology(IF 3.421), 2013, Vol.177, pp.24-34Elsevier
摘要:... However, incorporating simple empirical modifications to surface-structure roughness parameters due to inter-annual variation in canopy height and leaf area did not lead to improved modeling of frictional velocity within this study. Further investigation of structure–rough...
作者:T. Teklemariam , R.M. Staebler , A.G. Barr
来源:[J].Agricultural and Forest Meteorology(IF 3.421), 2009, Vol.149 (11), pp.2040-2053Elsevier
摘要:... However, these estimates were sensitive to frictional velocity threshold ( u * TH ) used for screening data associated with poor turbulent mixing at night. Increasing u * TH from 0.2 m s −1 (based on the inflection point in the nighttime CO 2 flux vs. u * relationship) to...

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