The week's pick
Reseach Article
Experimental Study of Mixed Convection Heat Transfer to Thermally Developing Air Flow in a Horizontal Rectangular Duct
| International Journal of Computer Applications |
| Foundation of Computer Science (FCS), NY, USA |
| Volume 174 - Number 25 |
| Year of Publication: 2021 |
| Authors: Yasin K. Salman, Jalal M. Jalil, Ahmed F. Khudheyer |
10.5120/ijca2021921172
|
Yasin K. Salman, Jalal M. Jalil, Ahmed F. Khudheyer . Experimental Study of Mixed Convection Heat Transfer to Thermally Developing Air Flow in a Horizontal Rectangular Duct. International Journal of Computer Applications. 174, 25 ( Mar 2021), 44-53. DOI=10.5120/ijca2021921172
Abstract
This paper describes the case of combined free and forced convection heat transfer to a thermally developing air flow in a horizontal rectangular duct which has been studied experimentally for laminar internal flow. The heated surfaces were subjected to a constant heat flux while the duct short sides were kept unheated, for three cases lower, upper side heated only and both sides heated with constant heat flux and for five-duct angles of inclination 0° (horizontal). In the experimental study, the heat flux applied to the heated surfaces varied from 40 to 400 W/m2. This provides a modified Grashof number varied from 2.38*106 to 2.8*108 respectively, while the Reynolds number varied from 800 to 2100. Surface temperature, local heat transfer results reveal a significant effect of buoyancy force created by natural convection on the heat transfer process with the buoyancy makes the thermal boundary layer developed early in comparison with pure forced convection.
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