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April 17, 2019, 10:23 |
Flotation Process
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New Member
jalal kheadr
Join Date: Apr 2019
Posts: 15
Rep Power: 7 |
I´m simulating a flotation column in a domain with emulsion of liquid water and oil.
The simulation is semi-batch where air flows continuously through a batch layer of water-oil. Oil concentration inside the column is 500ppm. The distributor inlet at the bottom of the vessel has only air flowing through it (air volume fraction =1). This are my setup options: Steady state Simulation with 10000 iteration. Basic Settings: Liquid Water - Continuous Fluid ; oil - Dispersed Fluid with 20 micron diameter ;air- Dispersed Fluid with 1 mm diameter FLUID MODELS: Multiphase: Inhomogeneous Heat Transfer : Isothermal FLUID SPECIFIC MODELS: Fluid Buoyancy Model: Density Difference Turbulence: Liquid Water –shear stress transport; kerosene - Dispersed Phase Zero Equation ;air- Dispersed Phase Zero Equation FLUID PAIR MODLES: Interphase Transfer: Particle Model Momentum Transfer: Drag Force - Grace Turbulence Transfer: Sato Enhanced Eddy Viscosity Mass transfer- None. If I solve with this parameters all goes right. My questions are: 1)If i interested in modeling the interactions between the oil droplets or gas bubbles (coalescence or breakup), what would i need to model them? 2)My supervisor said that there is mass transfer occur between the oil droplets and gas bubbles and this phenomena is the cause of separation of oil from water by the air and rising to the surface, is this correct? 3) Does the speech in the below paragraph relate to my research? 7.15.2. User Specified Mass Transfer For advanced applications, it is possible to directly specify the interphase mass transfer sources. You may specify the interfacial mass flux or the interfacial mass flow (volumetric mass source) between any pair of phases. The latter is more appropriate for volumetric mass transfer processes such as breakup and collision. For details, see User Defined Interphase Mass Transfer in the CFX-Solver Theory Guide. Release 16.2 - © SAS IP, Inc. All rights reserved. Thank you for help. |
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