May 16-21, 2010
This paper presents results of a train of bubbles moving through a fluidized bed imaged with an X-ray Tomographic Scanner. The scanner consists of three X-ray sources equipped with 2*30 CdWO4 detectors each. The fluidized bed has a diameter of 23cm and is filled with polystyrene particles (mean diameter 560μm). The bed is set at minimal fluidization and additional gas is released from a single capillary, forming a train of bubbles moving upwards through the bed. The scanner measures the shape, size and velocity of the bubbles passing the measuring plane. We present data showing that the scanner can quantify for each bubble its size and velocity. The smallest bubbles detected have an equivalent diameter of less than 3cm.
Robert Frank Mudde, "FAST X-RAY TOMOGRAPHY OF A BUBBLING FLUIDIZED" in "The 13th International Conference on Fluidization - New Paradigm in Fluidization Engineering", Sang Done Kim,Korea Advanced Institute of Science and Technology, Korea; Yong Kang, Chungnam National University, Korea; Jea Keun Lee, Pukyong National University, Korea; Yong Chil Seo, Yonsei University, Korea Eds, ECI Symposium Series, (2010). http://dc.engconfintl.org/fluidization_xiii/27