Heat transport scaling in turbulent Rayleigh-Benard convection: Effects of rotation and prandtl number

We report experimental measurements of turbulent heat transport in rotating Rayleigh-Benard convection. The fluid was water with Prandtl number 3 < sigma < 7. Heat transport and local temperature measurements were made for Rayleigh numbers 2 x 10(5) < Ra < 5 x 10(8) and Taylor numbers 0 less than or equal to Ta less than or equal to 5 x 10(9). For fixed convective Rossby numbers Ro between 0.1 and 1.5, the Nusselt number N scaled closely as the 2/7 power of Ra but had very little variation with the Prandtl number a and only a moderate increase with increasing rotation rate. Substantial disagreement is found with existing scaling theories.