TITLE:
Effect of Insulated Oblique Plates on Heat Transfer and Recirculating Flow in a Channel
AUTHORS:
Yinxiao Zhan, Tae Seon Park
KEYWORDS:
Heat Transfer Enhancement, Reynolds Number, Flow Oscillation
JOURNAL NAME:
Journal of Applied Mathematics and Physics,
Vol.2 No.6,
May
19,
2014
ABSTRACT:
Flow and heat transfer characteristics of a
channel with oblique plates which are mounted periodically on the channel
wall have been numerically investigated in a laminar range. The main objective
of the present study is to find the effect of the tilt angle of oblique plate
on pressure drop and heat transfer characteristics in unsteady states. To get
the different conditions of the heat transfer and flow evolution, two key
parameters of the Reynolds number and the tilt angle of oblique plate are
considered. At Re=200,600
, the tilt angles are changed for the range of 50° - 130°.
The computational results show that the heat transfer and pressure drop are
strongly dependent on the tile angle and Reynolds number. When the flows are
unsteady, the tilt angle has an important role in the heat transfer
enhancement. Oscillatory structures induce the better mixing of the thermal
field and promote the wall heat transfer. For a constant plate length, the wall
heat trans- fer is maximized near the 90° - 100°. This is strongly coupled with
the variations of flow mixing induced by the oblique plate.