private void fixPIMPLE_PISOSolver(Model model) {
    State state = model.getState();
    if (state.isTransient() && state.isIncompressible()) {
      SystemFolder systemFolder = model.getProject().getSystemFolder();
      Dictionary fvSolution = systemFolder.getFvSolution();

      Dictionary stateData = model.getDefaults().getDefaultStateData();
      Dictionary pisoSolution =
          stateData.subDict("pisoFoamRAS").subDict(SYSTEM).subDict(FV_SOLUTION);
      Dictionary pimpleSolution =
          stateData.subDict("pimpleFoamRAS").subDict(SYSTEM).subDict(FV_SOLUTION);

      if (isPISO() && fvSolution.found(SolverFamily.PIMPLE.getKey())) {
        systemFolder.setFvSolution(pisoSolution);
        state.setSolverFamily(SolverFamily.PISO);
        solversTable.updateSolver(state);
        ModulesUtil.updateSolver(modules, state);
        model.solverChanged();
      } else if (isPIMPLE() && fvSolution.found(SolverFamily.PISO.getKey())) {
        systemFolder.setFvSolution(pimpleSolution);
        state.setSolverFamily(SolverFamily.PIMPLE);
        solversTable.updateSolver(state);
        ModulesUtil.updateSolver(modules, state);
        model.solverChanged();
      }
    }
  }
 private boolean stateHasChanged() {
   State state = model.getState();
   SolverFamily family = state.getSolverFamily();
   if (state.isTransient() && state.isIncompressible()) {
     return family.isPiso() && isPIMPLE() || family.isPimple() && isPISO();
   }
   if (state.isTransient() && state.isCompressible() && state.isHighMach()) {
     return family.isCentral() && isPIMPLE() || family.isPimple() && isCENTRAL();
   }
   return false;
 }