Heat Transfer Suppression in Flow Around a Rotating Circular Cylinder at High Prandtl Number

Forced convection heat transfer across a 2D circular cylinder rotating at constant speed is investigated. Numerical simulations are carried out at constant values of Reynolds number in the range of 80–160. The non-dimensional rotation rate, α , is examined up to a maximum value of 5.3 for Prandtl number ( Pr ) 7. At constant Reynolds number, heat transfer suppression kicks off even at lower rotation rates contrary to the systems with lower values of Pr . Moreover, the heat transfer suppression parameter in such cases saturates at almost the double value at intermediate rotation rates as compared to the systems with low Pr .