This study focuses on the flow and heat transfer characteristics of high-speed airflow over the rough-wall which has periodic roughness and small amplitude. By using the OpenFOAM program, flows on the semi-infinite sinusoidal wavy plates under different inflow conditions are numerically studied. The results show that there is a direct correlation between the wall heat flux coefficient CQ and the total drag coefficient CD. For the attached flow, CQ/CD only depends on the equivalent roughness h, which is the ratio of the roughness to the thickness of the boundary layer. When the flow separation occurs, CQ/CD no longer changes with roughness and only depends on the position variable x, which is defined by the similar transformation.
LI Yuchuan
,
BAO Lin
. Numerical study of the relationship between heat flux and drag in the flow on wavy rough-wall[J]. Journal of University of Chinese Academy of Sciences, 2019
, 36(6)
: 736
-744
.
DOI: 10.7523/j.issn.2095-6134.2019.06.003
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