TY - EJOU
AU - Abbassi, A.
AU - Aissia, H. Ben
TI - Forced-Mixed Convection Transition of a Buoyant Axisymmetric Jet with Variable Properties
T2 - Fluid Dynamics \& Materials Processing
PY - 2014
VL - 10
IS - 1
SN - 1555-2578
AB - This paper describes the transition from forced to mixed convection in a jet flow with variable properties. The classical laminar layer analysis is extended by taking into account the dependence of physical properties on temperature. The related model relies on the assumption that the variations of Prandtl number and specific heat at constant pressure are sufficiently small to be neglected. A second-order finite-difference numerical method based on a staggered grid is used to analyze transition, hydrodynamic and heat transfer phenomena in the jet. The dimensionless control parameter, Λ = *T*_{0}/T_{∞}, is limited to values less than 1. It is found that the variation of physical properties with temperature has a significant effect on jet flow velocity, whereas this dependence has an almost negligible influence on the expansion characteristics of the flow.
KW - Axisymmetric jet
KW - forced convection regime
KW - mixed convection regime
KW - transition
KW - variable properties
DO - 10.3970/fdmp.2014.010.115