پديدآورندگان :
Keshavarz Moraveji Mostafa Department of Chemical Engineering, Amirkabir University of Technology (Tehran Polytechnic), 424 Hafez Avenue, Tehran 15875-4413, Iran , Havaie behbahani Marjan Department of Chemical Engineering, Amirkabir University of Technology (Tehran Polytechnic), 424 Hafez Avenue, Tehran 15875-4413, Iran , Darvishi Abdolmajid Department of Chemical Engineering, Amirkabir University of Technology (Tehran Polytechnic), 424 Hafez Avenue, Tehran 15875-4413, Iran
كليدواژه :
external airlift bioreactors , gas holdup , volumetric mass transfer coefficient , three phase , computational fluid dynamics (CFD)
چكيده فارسي :
In this paper is described the effect of presence of solid on hydrodynamics and mass transfer characteristics for two amp; three phase flow in an external split cylindrical airlift reactor such as gas hold up and mass transfer coefficient usage Computational Fluid Dynamics (CFD). Mentioned parameters are investigated at two Solid concentrations (0.25,0.5 wt%) in oil mirco-emulsion in water (5 vol%) at several of superficial gas velocity (0.2–1 cm/s) in an external split-cylinder airlift bioreactor. Simulation is based on two dimension (2D), k_ε model for turbulency model and Eulerian model for phase behavior model. As are observed the gas hold-up and mass transfer coefficient for all the fluids increased with increasing the gas velocity and decreased with increasing the solid concentration. Results are compared with the experimental result data
