01799nas a2200229   4500008004100000022001400041245007700055210006900132260007900201300001200280490000600292520103300298653000801331653001401339653002201353653001101375653001201386653002001398100001801418700002301436856011001459       2011                        eng d  a1674-200100aScaling laws for gas-solid riser flow through two-fluid model simulation0 aScaling laws for gassolid riser flow through twofluid model simu  a360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USAbELSEVIER SCIENCE INCcAPR  a121-1290 v93 a<p>Scale up of gas-solid circulating fluidized bed (CFB) risers poses many challenges to researchers. In this paper, CFD investigation of hydrodynamic scaling laws for gas-solid riser flow was attempted on the basis of two-fluid model simulations, in particular, the recently developed empirical scaling law of Qi, Zhu, and Huang (2008). A 3D computational model with periodic boundaries was used to perform numerical experiments and to study the effect of various system and operating parameters in hydrodynamic scaling of riser flow. The Qi scaling ratio was found to ensure similarity in global parameters like overall cross-sectional average solid holdup or pressure drop gradient. However, similarity in local flow profiles was not observed for all the test cases. The present work also highlighted the significance of error bars in reporting experimental values. (C) 2010 Chinese Society of Particuology and Institute of Process Engineering, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.</p>10aCFD10aError bar10aPeriodic boundary10aRisers10aScaling10aTwo-fluid model1 aNaren, P., R.1 aRanade, Vivek., V.  uhttps://library.ncl.res.in/content/scaling-laws-gas-solid-riser-flow-through-two-fluid-model-simulation-0