In the current study, five different atomistic water models (AWMs) are implemented, In order to investigate the impact of AWMs treatment on the water velocity profile and density number. For this purpose, Molecular dynamics simulation (MDS) of Poiseuille flow in a nano-channel is conducted. Considered AWMs are SPC/E, TIP3P, TIP4P, TIP4PFQ and TIP5P. To assessment of the ability of each model in...

The QSQH theory is extended to all three velocity components taking into account the fluctuations of direction large-scale component wall friction. This effect found be significant. It explains large sensitivity longitudinal and spanwise velocities variations in Reynolds number comparison with mean velocity, stress, wall-normal fluctuations. analysis shows that variation dominated by amplitude ...

There are many open questions regarding the behaviour of turbulent boundary layers subjected to pressure gradients and this is confounded by the large parameter space that may affect these flows. While there have been many valuable investigations conducted within this parameter space, there are still insufficient data to attempt to reduce this parameter space. Here, we consider a parametric stu...

Flat plate turbulent boundary layers under zero pressure gradient at high Reynolds numbers are studied to reveal appropriate scale relations and asymptotic behaviour. Careful examination of the skin-friction coefficient results confirms the necessity for direct and independent measurement of wall shear stress. We find that many of the previously proposed empirical relations accurately describe ...

Within wall turbulence, there is a sublayer where the mean wall-normal flux of streamwise momentum constant and related to logarithmic profile velocity. This relation, i.e., law wall, has been used estimate stress at surface. However, exhibits large temporal fluctuations. To relate them theoretically those velocity same position from we consider an orthogonal decomposition fluctuations on plane...

After an extensive survey of mean-velocity profile measurements in various two-dimensional incompressible turbulent boundarylayer flows, it is proposed to represent the profile by a linear combination of two universal functions. One is the well-known law of the wall. The other, called the law of the wake, is characterized by the profile at a point of separation or reattachment. These functions ...

This paper presents an analysis of a new method for retrieving the parameters atmospheric boundary layer in hurricanes. is based on approximation upper parabolic part wind speed profile and retrieval lower logarithmic part. Based part, friction velocity, near-surface aerodynamic drag coefficient are obtained. The obtained data used verification modeling WRF-ARW model. case Irma hurricane studie...

[1] A mechanistic model is derived for the rate of fluvial erosion into bedrock by abrasion from uniform size particles that impact the bed during transport in both bed and suspended load. The erosion rate is equated to the product of the impact rate, the mass loss per particle impact, and a bed coverage term. Unlike previous models that consider only bed load, the impact rate is not assumed to...

An analysis of the mean velocity profile in the intermediate region of wall-bounded turbulence shows that the well-known von Karman-Prandtl logarithmic law of the wall must be jettisoned in favor of a power law. An analogous analysis of the local structure of turbulence shows that the Kolmogorov-Obukhov scaling of the second and third structure functions is exact in the limit of vanishing visco...