Computational Fluid-Dynamics and Experimental Verification of Two-Phase Two-Dimensional Flow on a Sieve Column Tray

Three-dimensional simulation of liquid flow on a sieve tray under different inclinations

“…The performance of a large distillation column always suffers from a loss of separation ability due to maldistributed or abnormal flow of the liquid phase on the tray. For example, liquid phase circulation, which frequently occurs on a tray, may cause a serious reduction in the Murphree tray efficiency (Yu et al, 1999). Therefore, to accurately predict the tray efficiency, the hydrodynamics of non-uniform flow on the tray must be considered (Bell and Solari, 1974;Yu et al, 1983).…”

Simulation of Hydrodynamics and Mass Transfer in a Valve Tray Distillation Column Using Computational Fluid Dynamics Approach

“…This, in fact, opens an issue on the computation for mass transfer prediction based on the fluid dynamics computation (Sun et al, 2007). Several recent publications have established the potential of CFD for describing tray hydraulics and tray performance (Wijn, 1996;Mehta et al, 1998;Fischer & Quarini, 1998;Yu et al, 1999;Krishna & van Baten, 1999;Liu et al, 2000;Ling et al, 2004;Rahbar et al, 2006;Li et al, 2009;Alizadehdakhel, 2010). The experts cited transport phenomena such as fluid flow, heat and mass transfer, and multi-phase flow as subjects that are insufficiently understood.…”

“…Interactions with the vapour phase are taken account by use of interphase momentum transfer coefficients determined from empirical correlations. Yu et al (1999) attempted to model the two-phase flow behaviour using a two-dimensional model, focussing on the description of the hydrodynamics along the liquid flow path, ignoring the variations in the direction of gas flow along the height of the dispersion. Fischer and Quarini (1998) these authors assumed a constant drag coefficient of 0.44, which is appropriate for uniform bubbly flow.…”

“…But their assumption of constant equilibrium ratio would lead to a large deviation in the case of having wide range of tray concentration. Therefore, a variable equilibrium ratio is adopted to recalculate the concentration field on the tray in this study (Yu et al, 1999). You analysed quantitatively the dependence of mass transfer performance of sieve distillation tray on the physical properties of fluid and tray flow patterns and discussed the ways to improve the efficiency of distillation sieve tray (You, 2004).…”

Incorporation of Eulerian–Eulerian CFD framework in mathematical modeling of chemical absorption of acid gases into methyl diethanol amine on sieve trays

“…Several investigators have attempted to include the hydrodynamics of plate in the model by using CFD [8][9][10][11][12]. Although the previous models are able to give satisfactory results for the velocity profile at different liquid rates, but they have overlooked effect of chemical reactions in the liquid.…”