Conference proceeding
A two-phase flow model to evaluate the effect of fish passage structures on the hydrodynamics and TDG downstream of McNary Dam
RIVER FLOW 2016, pp.2389-2396
01/01/2016
DOI: 10.1201/9781315644479-371
Abstract
Hydropower dams may delay salmonids migration and increase exposure to elevated Total Dissolved Gas (TDG) and predation. In this study, a Computational Fluid Dynamics (CFD) model was developed to support design and operations of McNary Dam to increase fish survival rate. A Volume of Fluid (VOF) method was used to determine spillway jet regimes. A two-phase scalar transport equation was used to predict the TDG field considering the bubble/liquid mass transfer, which is a function of the gas volume fraction and bubble size. The bubbly flow downstream of the spillway was simulated with a mixture model. A Reynolds stress model provided anisotropic closure for the two-phase RANS equations. A particle tracking technique was incorporated to compute flow exposure and duration within predator habitat. After validation, the model was used to evaluate the hydrodynamic characteristics and TDG distribution for several operational/structural configurations.
Details
- Title: Subtitle
- A two-phase flow model to evaluate the effect of fish passage structures on the hydrodynamics and TDG downstream of McNary Dam
- Creators
- M. Politano - University of IowaR. Laughery - Walla Walla Dist Corps Engineers, Walla Walla, WA USA
- Contributors
- George Constantinescu (Editor)Marcelo Garcia (Editor)Dan Hanes (Editor)
- Resource Type
- Conference proceeding
- Publication Details
- RIVER FLOW 2016, pp.2389-2396
- DOI
- 10.1201/9781315644479-371
- Publisher
- Crc Press-Balkema
- Number of pages
- 8
- Language
- English
- Date published
- 01/01/2016
- Academic Unit
- Civil and Environmental Engineering; IIHR--Hydroscience and Engineering
- Record Identifier
- 9984627190202771
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