American Society of Civil Engineers


3D Numerical Simulation of Turbulent Shallow-Water Flow in Square Harbor


by Marco D. J. P. Bijvelds, Ph.D., (Student, Hydromech. Sect., Dept. of Civ. Engrg., Delft Univ. of Tech., P.O. Box 5048, 2600 GA, Delft, The Netherlands. E-mail: M.Bijvelds@ct.tudelft.nl), C. Kranenburg, (Assoc. Prof., Hydromech. Sect., Dept. of Civ. Engrg., Delft Univ. of Tech., P.O. Box 5048, 2600 GA, Delft, The Netherlands. E-mail: C.Kranenburg@ct.tudelft.nl), and Guus S. Stelling, (Prof., Hydromech Sect., Dept. of Civ. Engrg., Delft Univ. of Tech., P.O. Box 5048, 2600 GA, Delft, The Netherlands. E-mail: G.Stelling@ct.tudelft.nl)

Journal of Hydraulic Engineering, Vol. 125, No. 1, January 1999, pp. 26-31, (doi:  http://dx.doi.org/10.1061/(ASCE)0733-9429(1999)125:1(26))

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Document type: Journal Paper
Abstract: Three-dimensional computations of a homogeneous shallow-water cavity flow in a square harbor were carried out. The turbulent flow was driven by a stationary current in an adjacent model river. The standard single-length-scale k-ε turbulence was found to underestimate the effective horizontal eddy viscosity in the mixing layer. To model the nonisotropic behavior of the flow, a two-length-scale turbulence model has been implemented by adding a depth-averaged -ik-ε model to the existing numerical model TRISULA. This model accounts for large scale turbulence generated in the mixing layer by horizontal shear. Comparison with experimental results showed a significant improvement of the computational results while the increase in computational costs was negligible.


ASCE Subject Headings:
Eddies
Harbors
Shallow water
Three-dimensional models
Turbulent flow
Viscosity