Large-eddy simulation of starting buoyant jets
Name
Adams_Large-eddy simulation.pdf
Size
1.43 MB
Format
Adobe PDF
Checksum (MD5)
c22a6f239f1085be47edc5eae10db9cf
Author(s)
Law, Adrian Wing-Keung
Adams, E. Eric
Fringer, Oliver B.
Wang, Ruoqian
Date Issued
December 2010
Journal
Environmental Fluid Mechanics
Publisher
Springer-Verlag
Citation
Wang, Ruo-Qian, Adrian Wing-Keung Law, E. Eric Adams, and Oliver B. Fringer. “Large-Eddy Simulation of Starting Buoyant Jets.” Environ Fluid Mech 11, no. 6 (December 2011): 591–609.
Version
Author's final manuscript
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.
MIT Department
Massachusetts Institute of Technology. Department of Civil and Environmental Engineering
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1007/s10652-010-9201-0
