skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: A computational fluid dynamics modeling study of guide walls for downstream fish passage

; ; ;
Publication Date:
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Ecological Engineering
Additional Journal Information:
Journal Volume: 99; Journal Issue: C; Related Information: CHORUS Timestamp: 2017-10-04 16:20:25; Journal ID: ISSN 0925-8574
Country of Publication:

Citation Formats

Mulligan, Kevin Brian, Towler, Brett, Haro, Alex, and Ahlfeld, David P. A computational fluid dynamics modeling study of guide walls for downstream fish passage. Netherlands: N. p., 2017. Web. doi:10.1016/j.ecoleng.2016.11.025.
Mulligan, Kevin Brian, Towler, Brett, Haro, Alex, & Ahlfeld, David P. A computational fluid dynamics modeling study of guide walls for downstream fish passage. Netherlands. doi:10.1016/j.ecoleng.2016.11.025.
Mulligan, Kevin Brian, Towler, Brett, Haro, Alex, and Ahlfeld, David P. Wed . "A computational fluid dynamics modeling study of guide walls for downstream fish passage". Netherlands. doi:10.1016/j.ecoleng.2016.11.025.
title = {A computational fluid dynamics modeling study of guide walls for downstream fish passage},
author = {Mulligan, Kevin Brian and Towler, Brett and Haro, Alex and Ahlfeld, David P.},
abstractNote = {},
doi = {10.1016/j.ecoleng.2016.11.025},
journal = {Ecological Engineering},
number = C,
volume = 99,
place = {Netherlands},
year = {Wed Feb 01 00:00:00 EST 2017},
month = {Wed Feb 01 00:00:00 EST 2017}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1016/j.ecoleng.2016.11.025

Citation Metrics:
Cited by: 1work
Citation information provided by
Web of Science

Save / Share:
  • This paper, the second part of a 2 part paper, discusses the use of Computational Fluid Dynamics (CFD) to gain further insight into the results of fish release testing conducted to evaluate the modifications made to upgrade Unit 8 at Wanapum Dam. Part 1 discusses the testing procedures and fish passage survival. Grant PUD is working with Voith Siemens Hydro (VSH) and the Pacific Northwest National Laboratory (PNNL) of DOE and Normandeau Associates in this evaluation. VSH has prepared the geometry for the CFD analysis corresponding to the four operating conditions tested with Unit 9, and the 5 operating conditionsmore » tested with Unit 8. Both VSH and PNNL have conducting CFD simulations of the turbine intakes, stay vanes, wicket gates, turbine blades and draft tube of the units. Primary objectives of the analyses were: • determine estimates of where the inserted fish passed the turbine components • determine the characteristics of the flow field along the paths calculated for pressure, velocity gradients and acceleration associated with fish sized bodies • determine the velocity gradients at the structures where fish to structure interaction is predicted. • correlate the estimated fish location of passage with observed injuries • correlate the calculated pressure and acceleration with the information recorded with the sensor fish • utilize the results of the analysis to further interpret the results of the testing. This paper discusses the results of the CFD analyses made to assist the interpretation of the fish test results.« less
  • Protection of downstream migrant fish at hydroelectric plants was not always considered necessary or economical. The early practice was to accommodate the more visible upstream migration of adult fish and ignore downstream migrants. But with the revival of interest in hydropower, coupled with increased concern for preserving fish populations, comes the question of which method to employ for greatest effect - and at what cost to developers. 7 figures.
  • Tropical rivers have high annual discharges optimal for hydropower and irrigation development. The Mekong River is one of the largest tropical river systems, supporting a unique mega-diverse fish community. Fish are an important commodity in the Mekong, contributing a large proportion of calcium, protein, and essential nutrients to the diet of the local people and providing a critical source of income for rural households. Many of these fish migrate not only upstream and downstream within main-channel habitats but also laterally into highly productive floodplain habitat to both feed and spawn. Most work to date has focused on providing for upstreammore » fish passage, but downstream movement is an equally important process to protect. Expansion of hydropower and irrigation weirs can disrupt downstream migrations and it is important to ensure that passage through regulators or mini hydro systems is not harmful or fatal. Many new infrastructure projects (<6 m head) are proposed for the thousands of tributary streams throughout the Lower Mekong Basin and it is important that designs incorporate the best available science to protect downstream migrants. Recent advances in technology have provided new techniques which could be applied to Mekong fish species to obtain design criteria that can facilitate safe downstream passage. Obtaining and applying this knowledge to new infrastructure projects is essential in order to produce outcomes that are more favorable to local ecosystems and fisheries.« less
  • Computational fluid dynamics (CFD) modeling, which has recently proven to be an effective means of analysis and optimization of energy-conversion processes, has been extended to coal gasification in this paper. A 3D mathematical model has been developed to simulate the coal gasification process in a pressurized spout-fluid bed. This CFD model is composed of gas-solid hydrodynamics, coal pyrolysis, char gasification, and gas phase reaction submodels. The rates of heterogeneous reactions are determined by combining Arrhenius rate and diffusion rate. The homogeneous reactions of gas phase can be treated as secondary reactions. A comparison of the calculated and experimental data showsmore » that most gasification performance parameters can be predicted accurately. This good agreement indicates that CFD modeling can be used for complex fluidized beds coal gasification processes. 37 refs., 7 figs., 5 tabs.« less
  • A two-dimensional model is developed to simulate discharge of a lithium/thionyl chloride primary battery. The model accounts for not only transport of species and charge, but also the electrode porosity variations and the electrolyte flow induced by the volume reduction caused by electrochemical reactions. Numerical simulations are performed using a finite volume method of computational fluid dynamics. The predicted discharge curves for various temperatures are compared to the experimental data with excellent agreement. Moreover, the simulation results. in conjunction with computer visualization and animation techniques, confirm that cell utilization in the temperature and current range of interest is limited bymore » pore plugging or clogging of the front side of the cathode as a result of LiCl precipitation. The detailed two-dimensional flow simulation also shows that the electrolyte is replenished from the cell header predominantly through the separator into the front of the cathode during most parts of the discharge, especially for higher cell temperatures.« less