Central axial velocity drops too fast for round jet flow using LES -- CFD Online Discussion Forums

November 14, 2016, 03:29	Central axial velocity drops too fast for round jet flow using LES	#1
HuifengGong New Member Huifeng Join Date: Oct 2016 Posts: 18 Rep Power: 9	Hi all, I am simulating the turbulent round jet air flow from a nozzle tube (5mm in diameter) with LES, and the results shows that the mean axial velocity along the centerline drops much faster compared with experimental data, can anyone give me some comments? The inlet boundary is located at the nozzle tube outlet, and a mean velocity profile is specified according to the experimental data with UDF. SGS model is Smagorinsky-Lilly Model, and the spectral synthesizer is used to provide the fluctuation with a turbulent intensity of 5%. other settings are just given according to FLUENT manual. Thank you!

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