화학공학소재연구정보센터
Canadian Journal of Chemical Engineering, Vol.83, No.3, 418-424, 2005
Determination of intrinsic minimum bubbling velocity in fine powder aerations based on experimentally measured elastic deformation coefficients
It is found that the minimum bubbling velocity of aerated fine powder can be defined by experimentally measuring incremental elastic deformation coefficient (Upsilon). The value of Upsilon starts changing at a certain degree of powder expansion. The sudden change of Upsilon indicates the initiation of the fractures in the homogeneously aerated expanded (HAE) emulsion phase. The intrinsic minimum gas velocity (U-mb*), which causes this fracture initiation, can be significantly smaller than the so-called minimum bubbling velocity (U-mb) defined by the classical concepts.