Direct numerical simulations (DNS) of flow over and heat transfer from the stagnation region of a circular cylinder with and without incoming free-stream turbulence have been carried out at a Reynolds number of Re_(D) velence 140 000 (based on the inflow velocity and the cylinder diameter D), which is in the higher subcritical range. A splitter plate was introduced behind the cylinder to counteract the formation of a vortex street. Compared to the fully laminar simulation, the addition of Tu velence 30percent grid turbulence at the inflow plane was found to lead to an increase in heat transfer at the stagnation line of the cylinder of 66percent.
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