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Volume 16, Issue 31 (4-2020)                   Marine Engineering 2020, 16(31): 139-148 | Back to browse issues page

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Asghari B, Hamidi M, Navayi Neya B, Abessi O. Numerical and Laboratory Modeling of Urban Sewage Discharge from Single port outfalls into Marine Environment. Marine Engineering 2020; 16 (31) :139-148
URL: http://marine-eng.ir/article-1-783-en.html
Numerical and Laboratory Modeling of Urban Sewage Discharge from Single port outfalls into Marine Environment
Bahare Asghari1 , Mehdi Hamidi * 1, Bahram Navayi Neya1 , Ozeair Abessi1
1- Babol Noshirvani University of Technology
Abstract:   (3161 Views)
The purpose of this paper is to investigate the behavior of positive buoyancy jets of urban wastewater in stationary and non-stratified water bodies using the investigation of the laboratory data acquired by a 3D-LIF laser 3D scanning system and numerical modeling results from the simulation by FLOW-3D software. Laboratory simulation was performed for three discharge jets with Froude numbers 10, 15, and 20, and compared with the results of the numerical model and the previous numerical results. The trajectory of the jet, concentration variations, the position of the impact point, and the rate of dilution at the impact point was determined. In the numerical model, both K-Ɛ and RNG turbulence models were used to evaluate the accuracy of the numerical simulation where the K-Ɛ results were closer to laboratory results and are capable of accurately modeling the jet trajectory than the RNG model. By different Froud numbers, the results at Fr = 20 are almost the same for all experimental and numerical states and indicating that by increasing the discharge and Froud number, the accuracy of the results in the numerical model increases and present closer results to the experimental model. 
Keywords: Numerical Simulation, positive buoyancy, 3D-LIF, FLOW-3D
Full-Text [PDF 716 kb]   (1400 Downloads)    
Type of Study: Research Paper | Subject: Environmental Study
Received: 2020/01/11 | Accepted: 2020/06/29
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