Gas-particle flows in vertical risers are involved in many industrial scale fluidized bed applications such as catalytic cracking, fossil or biomass combustion. Risers flows are often simulated by two-fluid model equations coupled with closures developed in the frame the kinetic theory of granular media. However, two-fluid model discretized over coarse mesh with respect to particle clustering size are performed for large units because of limited computational resources. Now, it is well established that meso-scales cancelled out by coarse mesh simulations have dramatic effect on overall behaviour of flows. This study proposed a sub-grid modeling approach for effective drag force and particle stresses which accounts for the effects of unresolved structures on the resolved flows.
|Publication status||Published - 2012|
|Event||2012 AIChE Annual Meeting - David L. Lawrence Convention Center, Pittsburgh, United States|
Duration: 28 Oct 2012 → 2 Nov 2012
|Conference||2012 AIChE Annual Meeting|
|Period||28/10/12 → 2/11/12|