Numerical simulation of high-speed turbulent water jets in air

摘要

Numerical simulation of high-speed turbulent water jets in air and itsvalidation with experimental data has not been reported in the literature. Itis therefore aimed to simulate the physics of these high-speed water jets andcompare the results with the existing experimental works. High-speed water jetsdiffuse in the surrounding atmosphere by the processes of mass and momentumtransfer. Air is entrained into the jet stream and the entire processcontributes to jet spreading and subsequent pressure decay. Hence the physicalproblem is in the category of multiphase flows, for which mass and momentumtransfer is to be determined to simulate the problem. Using the Eulerianmultiphase and the k-epsilon turbulence models, plus a novel numerical modelfor mass and momentum transfer, the simulation was achieved. The resultsreasonably predict the flow physics of high-speed water jets in air.