Department of Mechano-Micro Engineering, Tokyo Institute of Technology, Tokyo, Japan;
Graduate School of Science and Technology, Niigata University, Niigata, Japan;
Precision and Intelligence Laboratory, Tokyo Institute of Technology, Tokyo, Japan;
Visualization Research Center, Niigata University, Niigata, Japan;
Viscosity; Measurement; Vibrational; Viscometer; Thermal; Convection; Rayleigh; Number; PIV;