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مدل کشش
Discussion of the drag models will be presented in Chap. 3.
Syamlal and O'Brien drag model (Syamlal et al. 1993) for very dilute or homogeneous solid phase:
The homogeneous drag models (Arastoopour et al. 1990; Syamlal and O'Brien 2003; Gidaspow 1994; Wen and Yu 1966) assume a homogeneous structure inside the control volumes, which is not valid due to the formation of clusters (dense phase) in the concentrated particulate
Benyahia (2012a) concluded that use of the EMMS-based drag model is accurate and necessary for the prediction of the averaged solid mass and pressure profile along the fully developed flow region of the riser.
Equations (T-1) through (T-9) in Table 3.1 show the EMMS drag model based on Wang et al
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