NUMERICAL SIMULATION OF SKIMMING FLOW OVER MILD STEPPED CHANNEL |
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| Authors: | DONG Zhi-yong LEE Joseph Hun-wei |
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| Affiliation: | 1. Department of Earth Science, Indian Institute of Technology Roorkee, Roorkee, India;2. Structural Geology and Tectonophysics, Institute of Applied Geosciences, Karlsruhe Institute of Technology, Karlsruhe, Germany;1. Université de Montpellier, UMR HSM, CC57, 163 rue Auguste Broussonnet, 34090 Montpellier, France;2. Inria Lemon, Bât 5 – CC05 017, 860 rue Saint-Priest, 34095 Montpellier Cedex 5, France |
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| Abstract: | Numerical simulation of stepped channel flow was conducted using turbulence models based on the VOF technique. Stepped channel flow is a complicated air-water two-phase flow with free surface, which can be divided into three flow regimes: skimming flow, nappe flow and transition flow. The characteristics of skimming flow over mild stepped channel was investigated, including friction factors, air concentration profiles velocity field, clear-water and bulked depths, static pressure, etc. Smooth channel flow was also simulated to compare the hydraulic characteristics of the stepped channel flow with the smooth one. Comparisons between the computed and the measured were made. Furthermore, comparison of the computed air concentration with Straub and Anderson's data was also performed. The Fluent 6.1 software was employed to conduct this numerical simulation work. |
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| Keywords: | numerical simulation skimming flow stepped channel Volume Of Fluid (VOF) technique |
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