FLOW REGIMES RECOGNITION OF SPOUTED BEDS THROUGH MUTUAL INFORMATION FUNCTION

摘要

The objective of this paper is to determine whether the flow regimes in spouted beds can be recognized by the mutual information function of pressure fluctuation signals. It was found that packed bed has a low level and fast decay rate of mutual information, suggesting a quite random signal. Unstable spouting exhibits a high level of mutual information and strong periodic motion. While for stable spouting regime, the level of mutual information and the decay rate around time zero are between those for the packed bed and unstable spouting regimes. The mutual information function for signals measured on the wall has higher predictabilities compared to those measured inside the beds.