NUMERICAL INVESTIGATION OF FLOW STRUCTURE AND MIXED CONVECTION HEAT-TRANSFER OF IMPINGING RADIAL AND AXIAL JETS

Authors
POTTHAST F LASCHEFSKI H MITRA NK BISWAS G
Citation
F. Potthast et al., NUMERICAL INVESTIGATION OF FLOW STRUCTURE AND MIXED CONVECTION HEAT-TRANSFER OF IMPINGING RADIAL AND AXIAL JETS, Numerical heat transfer. Part A, Applications, 26(2), 1994, pp. 123-140
Citations number
15
Categorie Soggetti
Mechanics,Thermodynamics
Journal title
Numerical heat transfer. Part A, Applications → ACNP
ISSN journal
10407782
Volume
26
Issue
2
Year of publication
1994
Pages
123 - 140
Database
ISI
SICI code
1040-7782(1994)26:2<123:NIOFSA>2.0.ZU;2-P
Abstract
Mixed convection flowfields and heat transfer of partially enclosed ax ial and radial laminar jets impinging on a heated Pt plate have Been i nvestigated from the numerical solution of incompressible unsteady Nav ier-Stokes and energy equations with a Boussinesq approximation. For m ired convection flow at Re = 200, steady flow has not been observed fo r either the radial or the axial jet. For the smallest Grashof number (Gr = 10,000), periodic solutions have been obtained. With Gr = 40,000 , nonsteady nonperiodic (chaotic) flow appears. Free convection may in crease the heat transfer by more than 200%.