Title of article
Assessment of Turbulent Models in Computation of Strongly Curved Open Channel Flows
Author/Authors
Seyedashraf, Omid Faculty Member - Department of Civil Engineering - Kermanshah University of Technology, Kermanshah, Iran , Akhtari, Ali Akbar Hydraulics Engineering Faculty Member - Department of Civil Engineering - Razi University, Kermanshah, Iran
Pages
13
From page
39
To page
51
Abstract
Several rigorous turbulent models have been developed in the past years and it can be seen that more research is needed to reach a better understanding of their generality and precision by verifying their applications for distinct hydraulic phenomena; under certain assumptions. This survey evaluates the performance of Standard k-ε, Realizable k-ε, RNG k-ε, k-ω and RSM models in predicting flow behavior in a strongly curved open channel bend. Accordingly, three-dimensional numerical simulations were carried out using a state-of-the-art computational fluid dynamics code, ANSYS-Fluent14, which employs finite volume method to solve the respective governing equations. The models’ accuracy were analyzed and compared with observed data from experimental studies on a 90° open channel bend. The results indicate that although the RSM model can precisely capture all the flow characteristics in a strongly curved open channel flow, the Standard k-ε model may be considered as slightly less accurate yet much faster model.
Keywords
Volume Of Fluid , Two-Phase Flow , Turbulent Models , Strongly Curved Flow , Open Channel Bend
Journal title
Astroparticle Physics
Serial Year
2015
Record number
2433484
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