DOI: 10.1615/TSFP9
SPATIAL CORRELATION OF VELOCITY AND HEAT TRANSFER DOWNSTREAM OF A BACKWARD FACING STEP USING 2D-3C PIV AND IR THERMOGRAPHY
ABSTRACT
In the present study, the correlative relation between the heat transfer and the flow behaviors in the near-wall region downstream of a backward facing step is presented. The instantaneous flow and convective heat transfer distributions are measured using two-dimension-three component (2D-3C) PIV system and a high-speed infrared thermography at the same time. Using this system, the unsteady flow behavior in the xz cross section and the heat transfer on the heated wall are investigated for the Reynolds number range of from 2.5×103 to 7.6×103. In order to discuss the correspondence of the near-wall flow and the heat transfer, the cross correlation coefficient of these distributions is calculated, and the forward and downwash flows appear to enhance the heat transfer in the near-wall region.