where $Rec=uc\delta /\nu ,\u2009Pr=\nu /\kappa $, *ν* is the kinematic viscosity, *κ* is the thermal diffusivity, and the vector $u=\u2329u,v,w\u232a$ is composed of three velocity components in the *x* (streamwise), *y* (wall-normal), and *z* (spanwise) directions, respectively. The rotation number (or Rossby number) is defined as $Roc=2\Omega \delta /uc$, where Ω is the spanwise angular rotation vector. *p* is the nondimensional effective pressure ($p=p0\u2212(1/8)Roc2r2$) which combines the static pressure (*p*_{0}) and centrifugal force, and *r* represents the nondimensional distance away from the axis of rotation. Also, *t* is the nondimensional time and *θ* is the nondimensional temperature ($\theta =[T\u2212TL]/[TU\u2212TL]$) with $TU$ and $TL$ representing dimensional temperatures on the upper and lower walls, respectively. Equation (2) is uncoupled from Eq. (3), and buoyancy effects are neglected such that present DNS thermal statistics can be compared to the results of similar heat transfer studies involving rotation where negligible buoyancy effects were also assumed. The Prandtl number (Pr) was kept constant at 0.71.