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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Water engineering : A lattice boltzmann method for submarine outfalls: the mixing zone calculation
A lattice boltzmann method for submarine outfalls: the mixing zone calculation
Author : ZHUANGMING ZHAO, ZHENREN GUO&XIAO ZHAO&HAIJUN PENG(1)
ABSTRACT
Long submarine outfalls with a multiport diffuser are an efficient discharge device avoiding pollutant accumulation and
collapse of ecosystems by dispersing the treated effluents. The mixing zone of the effluents, within which the
concentration of one or more pollutants may exceed the relevant environmental quality standards, is quite important for
the outfalls. To accurately simulate the mixing zone, a new lattice Boltzmann method for the pollutant discharge from the
submarine outfalls is developed. It based on the combination of the lattice Boltzmann equation (LBE) and the kinematic
boundary condition (KBC) method to simulate the free surface. In the method, the flow field is modeled by LBE, whereas
the free surface is explicitly tracked by the local height function, which is calculated by the KBC method. Interpolationsupplemented
lattice Boltzmann (ISLB) method is introduced, which enables our approach to be applied on arbitrary,
nonuniform mesh grids. The turbulence model was applied to meat the requirement of turbulent flow. Moreover, a
lattice Boltzmann model for the advection and dispersion of pollutant is used. Several cases are simulated respectively to
validate the proposed method.
File Size : 1,384,671 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Water engineering
Date Published : 27/08/2015
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