Numerical simulation of dynamic flow behavior in rectangular bubble column

The ability to predict fluid flow dynamics is important in designing and developing bubble column reactors.Numerical simulations of the bubbly flow were conducted with the commercial software CFX4.4 to investigate the effect of the turbulent dispersion force and the performance of Tomiyama′s interfacial force closures together with the bubble-induced turbulence models(Pfleger Becker,Troshko Hassan) used in the k-e turbulence model in the simulation of the bubbly flow in a taller column.The turbulent dispersion force with the current correlation has a small effect on the investigated bubbly flow dynamics.When Tomiyama′s closures together with the bubble-induced turbulence models proposed by Pfleger Becker or Troshko Hassan were used in the simulation of bubbly flow in a taller column,it provided a good solution for the velocity distribution,and the model of Pfleger Becker performed slightly better than the model of Troshko Hassan because the latter over-predicts the bubble-induced turbulence time scale.