Local void fraction distributions of different superficial gas velocities at 24, 54, 68, and 81 C were measured with an electric conductivity probe in a fully baffled, dished base stirred vessel of 0.48 m diameter holding 0.145 m(3) of liquid. A 6-elliptical-blade disk turbine (HEDT) was used as the bottom impeller to disperse the incoming gas, with two down pumping 4-blade hydrofoil impeller (WHD) above. Results showed that the averaged local void fraction at of 81 degrees C was about 20% lower than that at ambient temperature, though the profiles were similar in both cases. The local void fraction increased with increasing superficial gas velocity. The standard Eulerian-Eulerian formulation of the k-epsilon turbulence model with multiple frames of the reference (MFR) was used in the simulation. The population balance model (PBM) combined with MUSIG model was implemented in the commercial CFX code. The simulated local void fraction profiles at N=4, 6, and 8 s(-1) at the same superficial velocity of V-s=0.0156 m/s and at the location of r/R=0.85 are in reasonable agreement with the measurements. (C) 2013 Elsevier Ltd. All rights reserved.