caa a22 4500 445874546 CHVBK 20180317145523.0 cr unu---uuuuu 170323e20111201xx s 000 0 eng 10.1007/s10652-010-9201-0 doi (NATIONALLICENCE)springer-10.1007/s10652-010-9201-0 Large-eddy simulation of starting buoyant jets [Elektronische Daten] [Ruo-Qian Wang, Adrian Law, E. Adams, Oliver Fringer] 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. Springer Science+Business Media B.V., 2010 Large Eddy Simulation (LES) nationallicence Starting phenomenon nationallicence Buoyant jet nationallicence Penetration nationallicence Wang Ruo-Qian Singapore-MIT Alliance for Research and Technology Center, Singapore, Singapore aut Law Adrian School of Civil and Environmental Engineering, Nanyang Technological University, Singapore, Singapore aut Adams E. Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA aut Fringer Oliver Environmental Fluid Mechanics Laboratory, Stanford University, Palo Alto, CA, USA aut Environmental Fluid Mechanics Springer Netherlands 11/6(2011-12-01), 591-609 1567-7419 11:6<591 2011 11 10652 https://doi.org/10.1007/s10652-010-9201-0 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10652-010-9201-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Wang Ruo-Qian Singapore-MIT Alliance for Research and Technology Center, Singapore, Singapore aut NATIONALLICENCE 700 1- Law Adrian School of Civil and Environmental Engineering, Nanyang Technological University, Singapore, Singapore aut NATIONALLICENCE 700 1- Adams E. Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA aut NATIONALLICENCE 700 1- Fringer Oliver Environmental Fluid Mechanics Laboratory, Stanford University, Palo Alto, CA, USA aut NATIONALLICENCE 773 0- Environmental Fluid Mechanics Springer Netherlands 11/6(2011-12-01), 591-609 1567-7419 11:6<591 2011 11 10652 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer