Towards full predictions of temperature dynamics in McNary Dam forebay using OpenFOAM  

作　　者：Yu-Shi WANG Marcela POLITANO Ryan LAUGHERY 

机构地区：[1]IIHR-Hydroscience and Engineering, The University of Iowa, Iowa City [2]U.S. Army Corps of Engineers, Walla Walla District, Walla Walla

出　　处：《Water Science and Engineering》2013年第3期317-330,共14页水科学与水工程（英文版）

基　　金：supported by Hydro Research Foundation (Grant No. DE-EE0002668)

摘　　要：Hydroelectric facilities impact water temperature; low velocities in a reservoir increase residence time and enhance heat exchange in surface layers. In this study, an unsteady three-dimensional model was developed to predict the temperatm＇e dynamics in the McNary Dam forebay. The model is based on the open-source code OpenFOAM. RANS equations with the Boussinesq approximation were used to solve the flow field. A： realizable k-ε model that accounts for the production of wind turbulence was developed. Solar radiation and convective heat transfer at the free surface were included. The result of the model was compared with the field data collected on August 18, 2004. Changes in diurnal stratification were adequately predicted by the model. Observed vertical and lateral temperature distributions were accurately captured. Results indicate that the model can be used as a numerical tool to assess structural and operational alternatives to reduce the forebay temperature.Hydroelectric facilities impact water temperature; low velocities in a reservoir increase residence time and enhance heat exchange in surface layers. In this study, an unsteady three-dimensional model was developed to predict the temperatm＇e dynamics in the McNary Dam forebay. The model is based on the open-source code OpenFOAM. RANS equations with the Boussinesq approximation were used to solve the flow field. A： realizable k-ε model that accounts for the production of wind turbulence was developed. Solar radiation and convective heat transfer at the free surface were included. The result of the model was compared with the field data collected on August 18, 2004. Changes in diurnal stratification were adequately predicted by the model. Observed vertical and lateral temperature distributions were accurately captured. Results indicate that the model can be used as a numerical tool to assess structural and operational alternatives to reduce the forebay temperature.

关 键 词：three-dimensional numerical simulation ＂ water temperature ＂ reservoir ＂ thermal dynamics OPENFOAM McNary Dam forebay 

分 类 号：P333[天文地球—水文科学]