Discrete Inverse Wavelet Transform Analysis for Gas-Solid Two Phase Flow
Masahiro Takei, Hui Li, Mitsuaki Ochi, Yoshifuru SAITO, Kiyoshi HORII · Journal of the Visualization Society of Japan · 1997
Air velocity distribution in solid-air two phase flow model has been clearly obtained from particle velocity distribution by discrete inverse wavelet transform. The particle velocity distribution of solid-air two phase flow consists of the exact air velocity and random noise velocity caused by the wake behind the particles. The discrete inverse wavelet transform extracts the exact air velocity from the particle velocity. The discrete wavelet transform collects the vector data of particle velocity in the vicinity of the mother wavelet spectrum. A matrix consisting of the spectrum data near the mother wavelet spectrum is inversely transformed. The matrix reduces the noise data, resulting in the exact air velocity data.