inline SimpleFluid2pWrappingProps::SimpleFluid2pWrappingProps(const Opm::IncompPropertiesInterface& props)
     : props_(props),
       smin_(props.numCells()*props.numPhases()),
       smax_(props.numCells()*props.numPhases())
 {
     if (props.numPhases() != 2) {
         THROW("SimpleFluid2pWrapper requires 2 phases.");
     }
     const int num_cells = props.numCells();
     std::vector<int> cells(num_cells);
     for (int c = 0; c < num_cells; ++c) {
         cells[c] = c;
     }
     props.satRange(num_cells, &cells[0], &smin_[0], &smax_[0]);
 }
    TransportSolverTwophaseReorder::TransportSolverTwophaseReorder(const UnstructuredGrid& grid,
                                                                   const Opm::IncompPropertiesInterface& props,
                                                                   const double* gravity,
                                                                   const double tol,
                                                                   const int maxit)
        : grid_(grid),
          props_(props),
          tol_(tol),
          maxit_(maxit),
          darcyflux_(0),
          source_(0),
          dt_(0.0),
          saturation_(grid.number_of_cells, -1.0),
          fractionalflow_(grid.number_of_cells, -1.0),
          reorder_iterations_(grid.number_of_cells, 0),
          mob_(2*grid.number_of_cells, -1.0)
#ifdef EXPERIMENT_GAUSS_SEIDEL
        , ia_upw_(grid.number_of_cells + 1, -1),
          ja_upw_(grid.number_of_faces, -1),
          ia_downw_(grid.number_of_cells + 1, -1),
          ja_downw_(grid.number_of_faces, -1)
#endif
    {
        if (props.numPhases() != 2) {
            OPM_THROW(std::runtime_error, "Property object must have 2 phases");
        }
        visc_ = props.viscosity();
        int num_cells = props.numCells();
        smin_.resize(props.numPhases()*num_cells);
        smax_.resize(props.numPhases()*num_cells);
        std::vector<int> cells(num_cells);
        for (int i = 0; i < num_cells; ++i) {
            cells[i] = i;
        }
        props.satRange(props.numCells(), &cells[0], &smin_[0], &smax_[0]);
        if (gravity) {
            initGravity(gravity);
            initColumns();
        }
    }