An integrated model,namely the two-equation turbulent model,is introduced to simulate mass transfer in a liquid-solid circulating fluidized bed(LSCFB)riser.Protein desorption is simulated and the proposed model is val...An integrated model,namely the two-equation turbulent model,is introduced to simulate mass transfer in a liquid-solid circulating fluidized bed(LSCFB)riser.Protein desorption is simulated and the proposed model is validated.The protein concentration profiles simulated with this model agree well with published experimental results.This model enables direct determination of turbulent mass diffusivity,removing the need to empirically guess a constant turbulent Schmidt number for simulating mass transfer in a turbulent flow.This model is useful when the turbulent mass diffusivity is not available for simulating mass transfer in an LSCFB riser.展开更多
Interfacial Marangoni convection has signifi-cant effect on gas-liquid and/or liquid-liquid mass transfer processes.In this paper,an approach based on lattice Boltzmann method is established and two perturbation models...Interfacial Marangoni convection has signifi-cant effect on gas-liquid and/or liquid-liquid mass transfer processes.In this paper,an approach based on lattice Boltzmann method is established and two perturbation models,fixed perturbation model and self-renewable interface model,are proposed for the simulation of interfacial Marangoni convection in gas-liquid mass transfer process.The simulation results show that the concentration contours are well consistent with the typical roll cell convection patterns obtained experimentally in previous studies.展开更多
基金This work was supported by the Open Foundation of State Key Laboratory of Chemical Engineering(No.SKL-ChE-19B04).
文摘An integrated model,namely the two-equation turbulent model,is introduced to simulate mass transfer in a liquid-solid circulating fluidized bed(LSCFB)riser.Protein desorption is simulated and the proposed model is validated.The protein concentration profiles simulated with this model agree well with published experimental results.This model enables direct determination of turbulent mass diffusivity,removing the need to empirically guess a constant turbulent Schmidt number for simulating mass transfer in a turbulent flow.This model is useful when the turbulent mass diffusivity is not available for simulating mass transfer in an LSCFB riser.
基金supported by the National Natural Science Foundation of China(Grant No.20736005).
文摘Interfacial Marangoni convection has signifi-cant effect on gas-liquid and/or liquid-liquid mass transfer processes.In this paper,an approach based on lattice Boltzmann method is established and two perturbation models,fixed perturbation model and self-renewable interface model,are proposed for the simulation of interfacial Marangoni convection in gas-liquid mass transfer process.The simulation results show that the concentration contours are well consistent with the typical roll cell convection patterns obtained experimentally in previous studies.
