Lagrangian and Eulerian models for simulating turbulent dispersion and coalescence of droplets within a spray |
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Authors: | Justin J Nijdam Baoyu GuoDavid F Fletcher Tim AG Langrish |
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Institution: | Department of Chemical Engineering, University of Sydney, NSW 2006, Australia |
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Abstract: | Lagrangian and Eulerian modelling approaches are compared for simulating turbulent dispersion and coalescence of droplets within a spray. Both models predict similar droplet dispersion rates and shifts in droplet size distribution due to coalescence within the spray, over a wide range of droplet and gas flows, and for sprays with different droplet-size distributions at the nozzle exit. The computer time required for simulating coalescence within a steady axisymmetric spray is of a similar order of magnitude regardless of which formulation, Eulerian or Lagrangian, is adopted. However, the Lagrangian formulation is more practical in terms of the range of applicability and ease of implementation. |
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