NDLI: Large-eddy simulation of starting buoyant jets

Content Provider	Springer Nature Link
Author	Wang, Ruo Qian Law, Adrian Wing Keung Adams, E. Eric Fringer, Oliver B.
Copyright Year	2010
Abstract	A series of Large Eddy Simulations (LES) are performed to investigate the penetration of starting buoyant jets. The LES code is first validated by comparing simulation results with existing experimental data for both steady and starting pure jets and lazy plumes. The centerline decay and the growth rate of the velocity and concentration fields for steady jets and plumes, as well as the simulated transient penetration rate of a starting pure jet and a starting lazy plume, are found to compare well with the experiments. After validation, the LES code is used to study the penetration of starting buoyant jets with three different Reynolds numbers from 2000 to 3000, and with a wide range of buoyancy fluxes from pure jets to lazy plumes. The penetration rate is found to increase with an increasing buoyancy flux. It is also observed that, in the initial Period of Flow Development, the two penetrative mechanisms driven by the initial buoyancy and momentum fluxes are uncoupled; therefore the total penetration rate can be resolved as the linear addition of these two effects. A fitting equation is proposed to predict the penetration rate by combining the two independent mechanisms.
Starting Page	591
Ending Page	609
Page Count	19
File Format	PDF
ISSN	15677419
Journal	Environmental Fluid Mechanics
Volume Number	11
Issue Number	6
e-ISSN	15731510
Language	English
Publisher	Springer Netherlands
Publisher Date	2010-12-14
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Large Eddy Simulation (LES) Starting phenomenon Buoyant jet Penetration Environmental Physics Oceanography Mechanics Hydrogeology Meteorology/Climatology
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Water Science and Technology

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