Numerical simulations of flow and contaminant transport using multiple depthaveraged two-equation turbulence models in the Solimões river near the Anamã city

Authors

  • Liren Yu ESDV (Environmental Software and Digital Visualization), lirenyu@yahoo.com, Rm.302, Unit4, Building420, WanSheng-Bei-Li, Ton-Zhou Dist., 101121, Beijing, CHINA, Researcher of ASSER-CESUSC, BRAZIL

Keywords:

depth-averaged turbulence models; contaminant transport; numerical modeling; river modeling; multi-grid iterative method; side-discharge

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.

Published

2014-09-29

How to Cite

Yu, L. . (2014). Numerical simulations of flow and contaminant transport using multiple depthaveraged two-equation turbulence models in the Solimões river near the Anamã city. Scientific Journal of Environmental Sciences, 3(5), 36-48. Retrieved from http://sjournals.com/index.php/sjes/article/view/1249

Issue

Section

Original Article