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Three-Dimensional Modeling of Density Current in a Straight Channel |
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| Authors: | Bahar Firoozabadi Hossein Afshin Ehsan Aram |
| Affiliation: | 1Associate Professor, School of Mechanical Engineering, Sharif Univ. of Technology, Azadi Ave., P.O. Box 11365-9567, Tehran, Iran (corresponding author). E-mail: firoozabadi@sharif.edu 2Ph.D. Student, School of Mechanical Engineering, Sharif Univ. of Technology, Azadi Ave., Tehran, Iran. E-mail: h_afshin@mech.sharif.edu 3Graduate Student, School of Mechanical Engineering, Sharif Univ. of Technology, Azadi Ave., Tehran, Iran. E-mail: ehsan.aram@gmail.com |
| Abstract: | Dense underflows are continuous currents that move downslope due to their density being heavier than that of the ambient water. In this work, a steady density current with a uniform velocity and concentration from a narrow sluice gate enters into a wide channel of lighter ambient fluid and moves forward downslope. Experiments varying inlet velocity and concentration and hence inlet Richardson numbers were conducted. Numerical simulations were also performed with a low-Reynolds number k–ε model. The results of numerical simulation agree well with the experimental data. |
| Keywords: | Density currents Turbulence Mathematical models Numerical models Three-dimensional models Channel flow |