Evaluation of Approximate Models of Buoyant Turbulent Flows.
Evaluation of Approximate Models of Buoyant Turbulent
Dai, Z.; Faeth, G. M.
National Institute of Standards and Technology (NIST)
and Society of Fire Protection Engineers (SFPE).
International Conference on Fire Research and
Engineering (ICFRE). Proceedings. September 10-15,
1995, Orlando, FL, SFPE, Boston, MA, Lund, D. P.;
Angell, E. A., Editor(s)(s), 141-146 pp, 1995.
Sponsor:National Institute of Standards and Technology,
fire research; turbulent flow; buoyant flow; evaluation;
At the present time, it is necessary to use approximate
turbulence models in order to analyze the properties of
practical fires due to the computational intractability
of fully resolved three-dimensional time-dependent
numerical simulations of buoyant turbulent flows
representative of fire environments. Developing
reliable models to treat buoyancy/turbulence
interactions, however, has been inhibited due to the
models to treat buoyancy/turbulence interactions,
however, has been inhibited due to the absence of
measurements needed to evaluate both model
approximations and predictions. Thus, the main
objective of the present investigation was to compete
measurements of the mean and turbulent properties of a
classical buoyant turbulent flow that is frequently used
to evaluate the predictions of turbulence models;
namely, the round buoyant turbulent plume in the
fully-developed (self-preserving) region far from the
source. The new measurements also are used to initiate
evaluation of turbulence modeling ideas, considering
both classical similarity concepts, and turbulence
models of varying complexity.