Based on Darcy’s law, a CFD model of permeate process in 19-channel ceramic membrane was established.The pure water flux (PWF) of ceramic membranes was predicted by the CFD model with the finite volume method.By usin...Based on Darcy’s law, a CFD model of permeate process in 19-channel ceramic membrane was established.The pure water flux (PWF) of ceramic membranes was predicted by the CFD model with the finite volume method.By using this method, the simulated PWF of 19-channel ceramic membrane was in good agreement with experimental results.The contributions of each channel to the total PWF of 19-channel ceramic membranes depended on the mean pore size of membrane as well as on the distance of the channel from the membrane outer surface.CFD modeling is an essential tool in designing the configuration of ceramic membrane.展开更多
Bubble behavior was observed by using high-speed digital camera in a two-dimensional rectangular bubble column of 0.20 m(width)× 0.02 m(thickness)× 2.00 m(height).Air and water were used as gas and liquid ph...Bubble behavior was observed by using high-speed digital camera in a two-dimensional rectangular bubble column of 0.20 m(width)× 0.02 m(thickness)× 2.00 m(height).Air and water were used as gas and liquid phases,respectively.Hydrodynamic simulation was conducted in the platform of commercial software package,ANSYS CFX 10.0,by combining the classical two-fluid model of turbulence and GRACE drag model.The computational distributions of bubble size from the MUSIG(multiple size group)model considering bubbles breakup and coalescence were in good agreement with experimental data,which showed that this model could be used to predict the bubble size distribution in the gas-liquid bubble column.展开更多
文摘Based on Darcy’s law, a CFD model of permeate process in 19-channel ceramic membrane was established.The pure water flux (PWF) of ceramic membranes was predicted by the CFD model with the finite volume method.By using this method, the simulated PWF of 19-channel ceramic membrane was in good agreement with experimental results.The contributions of each channel to the total PWF of 19-channel ceramic membranes depended on the mean pore size of membrane as well as on the distance of the channel from the membrane outer surface.CFD modeling is an essential tool in designing the configuration of ceramic membrane.
文摘Bubble behavior was observed by using high-speed digital camera in a two-dimensional rectangular bubble column of 0.20 m(width)× 0.02 m(thickness)× 2.00 m(height).Air and water were used as gas and liquid phases,respectively.Hydrodynamic simulation was conducted in the platform of commercial software package,ANSYS CFX 10.0,by combining the classical two-fluid model of turbulence and GRACE drag model.The computational distributions of bubble size from the MUSIG(multiple size group)model considering bubbles breakup and coalescence were in good agreement with experimental data,which showed that this model could be used to predict the bubble size distribution in the gas-liquid bubble column.
