Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : September 13, 2020 - September 16, 2020
We conduct a direct observation on propagation of transverse wave in colloidal suspension by confocal microscopy technique. Frame rate of the conventional microscopy technique was 30-40 frames/s, and particle motions at high frequencies could not be observed. However, using a periodic motion of the suspension, we succeeded to observe the motion of particles at 1,600 Hz. Displacement of the colloidal particles are synchronized with the excitation but the amplitude decays monotonically with respect to the distance from the excitation point. Fourier transformation of the damped oscillation revealed the propagation of transverse wave in the colloidal suspension.
