Title

Submerged Hydraulic Jump Study Using DES

Document Type

Article

Publication Date

10-2016

Publication Title

Journal of Hydraulic Engineering

First Page

04016091-1

Last Page

04016091-11

DOI

10.1061/(ASCE)HY.1943-7900.0001231

Abstract

In the present paper, three-dimensional, unsteady, detached eddy simulation (DES) of a submerged hydraulic jump with an inlet Froude number of 8.2 is performed. The volume of fluid (VOF) method with a high-resolution interface capturing (HRIC) scheme is used for free-surface tracking. The mean velocity and turbulence quantities including the Reynolds stresses are compared with available experimental data to validate the results. The three-dimensional nature of the flow in the developing and developed zone of the submerged hydraulic jump is evaluated by examining the coherent structures using the λ2" role="presentation" style="display: inline; line-height: normal; font-size: 12px; word-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; padding: 0px 2px 0px 0px; margin: 0px; font-family: arial, helvetica, clean, sans-serif; background-color: rgb(239, 239, 239); position: relative;">λ2λ2 criteria. Additionally, proper orthogonal decomposition (POD) analysis reveals the dominance of smaller structures in the developed region of the submerged hydraulic jump. The presence of these smaller scales is directly responsible for the energy dissipation characteristic of the submerged hydraulic jump.