Fine-grid TFM

Limited to computing capability, the following analysis confines the DNS to the fine-grid TFM simulation, which offers meso-scale closures for the correlative, coarse-grid TFM simulations. For comparison, the variational type of multi-scale CFD takes the EMMS-based models to close TFM simulations. 

Hot disputes exist as to whether the fine-grid TFM simulation is feasible to capture CFB flow behavior (Benyahia, 2012 Hong et al, 2015 Lu et al, 2009 Syamlal and Pannala, 2011 Wang et al, 2010). For the so-called fast fluidization with Geldart A particles, say, fluid catalytic cracking (FCC) catalyst, Lu et al (2009) pointed out that the fine-grid simulation may improve... 

CFD Simulation with/without Mesoscale Modeling 6.2.1 Comparison Between Fine-Grid TFM and EFM... 

For the gas-solids two-phase flow in a CFB riser, there is no clear separation between the micro-scale (fine-grid scale of TFM continual and the meso-scale (cluster scale), as discussed in Goldhirsch (2003) and Wang and Li (2007). Thus, the meso-scale structure does not vanish... 

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