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SIMPLE algorithm

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The SIMPLE Algorithm

If a steady-state problem is being solved iteratively, it is not necessary to fully resolve the linear pressure-velocity coupling, as the changes between consecutive solutions are no longer small. The SIMPLE algorithm:

  • An approximation of the velocity field is obtained by solving the momentum equation. The pressure gradient term is calculated using the pressure distribution from the previous iteration or an initial guess.
  • The pressure equation is formulated and solved in order to obtain the new pressure distribution.
  • Velocities are corrected and a new set of conservative fluxes is calculated.

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