Author(s): Yizhou Xiao, Wenxin Huai, Zhonghua Yang, Meng Gao
Linked Author(s): Yizhou Xiao
Keywords: Buoyant jet, large eddy simulation, velocity, temperature, vorticity
Abstract: Round thermal buoyant jets in cross flow occur in many natural and engineering applications. Examples of this flow configuration include oceanic outfalls, wastewater or pollutant discharges, which depend on environmental conditions, change in the ambient fluid, and impact on the environment. The large eddy simulation (LES) of round vertical thermal buoyant jets in cross flow has been conducted using the subgrid-scale model to capture turbulent performances. First, the simulations at previous experimental flow conditions for different temperature and velocity configurations in a cross-flow are conducted, and results obtained from simulations are in good agreement with Zeng's experimental data, thus validating the numerical reliability. The jet scalar and vector characteristics have been acquired, including jet trajectories, velocity, and temperature field. Additionally, instantaneous vortex structures and counter-rotating vortex pairs are analyzed and have been evaluated based on all numerical simulations. Results indicated that LES has a strong and authentic simulation of the detailed turbulent structure than that through experiments or other calculation models
Year: 2017