- Author
- Nee, V. W. | Liu, V. K.
- Title
- Algebraic Turbulence Model for Buoyant Recirculating Flow.
- Coporate
- Notre Dame Univ., IN
- Sponsor
- National Bureau of Standards, Gaithersburg, MD
- Report
- NBS GCR 78-152; TR-79002782, May 12, 1978, 110 p.
- Distribution
- NOTAvailable from National Technical Information Service
- Contract
- GRANT-G79002
- Keywords
- turbulent flow
- Abstract
- In this report, the development of an algebraic model for recirculating turbulent flow with strong buoyancy is described in detail. A general background study points to the need of a simple yet effective model for buoyant turbulent flows. Basic concepts behing this model are introduced and discussed. Computer results have been obtained based on different versions of this algebraic model and the governing differential equations. Comparisons are made for the constant eddy-viscosity model and the mixing length model. One salient feature of this model is a dynamical formulation for the shear control of turbulence, in addition to that of buoyancy control. Experimental measurements are available from both the National Bureau of Standards and the Notre Dame small tunnel facility. Results have been calculated for similar physical conditions. The overall agreement between the data and calculation gives an encouraging indication concerning the effectivenss of this simple model in the treatment of fire-induced buoyant flows in rooms and corridors.