**Mathematical Modelling of the Motion of Dust-Laden Gases in the Freeboard of CFB Using the Two-Fluid Approach**

Alexander Kartushinsky1 and Andres Siirde2

*1Tallinn University of Technology, Faculty of Science, Laboratory of Multiphase Media Physics, Tallinn, 2Tallinn University of Technology, Faculty of Mechanical Engineering, Department of Thermal Engineering, Tallinn, Estonia* 
