Numerical simulations of flow and contaminant transport using multiple depthaveraged two-equation turbulence models in the Solimões river near the Anamã city
Journal Title: Scientific Journal of Environmental Sciences - Year 2014, Vol 3, Issue 5
Abstract
This paper reports a quasi 3D numerical simulation in a curved river reach of the Solimões River near The Anamã City, Brazil, aiming to develop a numerical tool for modeling turbulent flows and pollutant transport in complex natural waters. The recently built depth-averaged two-equation turbulence model, together with and models were used to close non-simplified quasi 3D hydrodynamic fundamental governing equations. The discretized equations were solved by advanced multi-grid iterative method under non-orthogonal body-fitted coarse and fine two-levels’ grids with collocated variable arrangement. Except for steady flow and transport computation, the processes of contaminant inpouring and plume development, caused by the side-discharge from a tribytary, also have been investigated numerically. The used three closure approaches are suitable for modeling strong mixing turbulence. The established model with higher order of magnitude of transported variable provides a possibility to elevate the computational precision. Based on the developed hydrodynamic model, a CFD (Computational Fluid Dynamics) software, namely Q3drm1.0, was developed. This tool focuses on the refined simulations of the steady and unsteady problems of flow and temperature/contaminant transports in complicated computational domains with the strong ability to deal with different types of discharges: side-discharge, point-source discharge/point-sink, and area-source discharge from the slope along bank. In this paper, only the study of side-discharge is presented.
Authors and Affiliations
L. Yu| ESDV (Environmental Software and Digital Visualization), lirenyu@yahoo.com, Rm.302, Unit4, Building420, Wan- Sheng-Bei-Li, Ton-Zhou Dist., 101121, Beijing, CHINA.Researcher of ASSER-CESUSC, BRAZIL.
Keywords
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- EP ID EP1309
- DOI 10.14196/ sjes.v3i5.1704
- Views 421
- Downloads 30
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