Features of Dispersed Phase Modelling: Particles

Summary

All this, concisely:

1. Particles are elements of a medium and are completely independent from each other. This medium can be liquid (droplets), solid (grains of sand, dust grains, snowflakes) or gaseous (bubbles), and is separated by a separate continuous medium (liquid or gaseous), called the carrier phase. Different combinations of dispersed and continuous media form different dispersed systems, which are often familiar to us: dust in the air, bubbles in champagne, solid particles in a liquid (suspension), droplets in a liquid (emulsion).
   
   
2. When modelling particles, FlowVision uses the Euler method. This makes it possible to optimize the use of computational resources in multiphase calculations by reducing the number of equations needed to be solved and the amount of RAM used.
   
   
3. Currently, FlowVision is used to simulate:
   
   
   • Multiphase dispersed flows: aerosols, powders, emulsions, suspensions
   • The movement of gas bubbles in a liquid (taking into account the change in size of the bubbles)
   • Evaporation of liquid droplets
   • Combustion of coal and similar substances that separate into water, coke and ash
   • Spraying a jet from a nozzle (taking into account the splitting and merging of drops)
   • Surface icing
     
     
4. The key stages in creating a project for modelling dispersed flow are:

• • Determining the number of size groups in the spectrum of particles
  • Specifying the physical processes for the dispersed phase
  • Selecting a model for the drag coefficient of the cloud of particles
  • Selecting a model for Nusselt number
  • Dispersion settings on BCs
  • Dispersion settings for advanced users
  • Selecting variables for display in the PostProcessor