TY - JOUR
TI - Heat transfer from a rotating circular cylinder in the steady regime: Effects of Prandtl number
AU - Sharma Varun
AU - Dhiman Amit Kumar
JN - Thermal Science
PY - 2012
VL - 16
IS - 1
SP - 79
EP - 91
PT - Article
AB - In this work, effects of Prandtl number on the heat transfer characteristics  of an unconfined rotating circular cylinder are investigated for varying  rotation rate (α = 0 - 5) in the Reynolds number range 1 - 35 and Prandtl  numbers range 0.7 - 100 in the steady flow regime. The numerical calculations  are carried out by using a finite volume method based commercial CFD solver  FLUENT. The isotherm patterns are presented for varying values of Prandtl  number and rotation rate in the steady regime. The variation of the local and  the average Nusselt numbers with Reynolds number, Prandtl number and rotation  rate are presented for the above range of conditions. The average Nusselt  number is found to decrease with increasing value of the rotation rate for  the fixed value of the Reynolds and Prandtl numbers. With increasing value of  the Prandtl number, the average Nusselt number increases for the fixed value  of the rotation rate and the Reynolds number; however, the larger values of  the Prandtl numbers show a large reduction in the value of the average  Nusselt number with increasing rotation rate.