%0 Journal Article
%T Examination of Computational Precision  versus Modeling Complexity for Open  Channel Flow with Hydraulic Jump
%A Theodore V. Hromadka II
%A Prasada Rao
%J Journal of Water Resource and Protection
%P 1233-1244
%@ 1945-3108
%D 2019
%I Scientific Research Publishing
%R 10.4236/jwarp.2019.1110071
%X In this work, for flow with a hydraulic jump, the predictive capabilities of popular hydraulic models (HEC-RAS and WSPG) are validated with the published results from the three dimensional Computational Fluid Dynamics (CFD) model (OpenFOAM). The analysis is performed for flows with a Froude number of 6.125 and Reynolds number of 3.54 กม 10<sup>5</sup>. While the hydraulic models solve the one-dimensional energy equation, in the CFD model solution of the three dimensional Reynolds averaged Navier-Stokes (RANS) equations, with a turbulence model, is used. As the results indicate, although the hydraulic models can satisfactorily predict the location of the steady-state jump, the length of the hydraulic jump (<i>i.e. </i> distance from the toe of the jump to a location in tail water zone) and other jump characteristics are better simulated by the CFD model. The solution from hydraulic models is sensitive to the channel bottom roughness value.
%K OpenFOAM
%K HEC-RAS
%K WSPG
%K Rapidly Varying Flows
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=95576