Modeling turbulent mixing and sand distribution in the bottom boundary layer

Details Modeling turbulent mixing and sand distribution in the bottom boundary layer Modeling turbulent mixing and sand distribution in the bottom boundary layer

2011-04-04

arxiv.org/abs/1104.0481v1

Physics

Geophysics

Coastal Dynamics 2005 - Fifth Coastal Dynamics International Conference, Barcelona : Espagne (2005)

Scientific paper

For the calculation of turbulent mixing in the bottom boundary layer, we present simple analytical tools for the mixing velocity wm and the mixing length lm. Based on observations of turbulence intensity measurements, the mixing velocity wm is represented by an exponential function decaying with z. We suggest two theoretical functions for the mixing length, a first lm1 obtained from the k-equation written as a constant modeled fluctuating kinetic energy flux and a second lm2 based on von K\'arm\'an's similarity hypothesis. These analytical tools were used in the finite-mixing-length model of Nielsen and Teakle (2004). The modeling of time-mean sediment concentration profiles C(z) over wave ripples shows that at the opposite of the second equation lm2 which increases the upward convexity of C(z), the first equation lm1 increases the upward concavity of C(z) and is able to reproduce the shape of the measured concentrations for coarse sand.

Affiliated with

Also associated with

No associations

Rating

Modeling turbulent mixing and sand distribution in the bottom boundary layer does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Modeling turbulent mixing and sand distribution in the bottom boundary layer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Modeling turbulent mixing and sand distribution in the bottom boundary layer will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-317357