SolutionCheckKernel.hpp

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/*
 * ------------------------------------------------------------------------------------------------------------
 * SPDX-License-Identifier: LGPL-2.1-only
 *
 * Copyright (c) 2016-2024 Lawrence Livermore National Security LLC
 * Copyright (c) 2018-2024 Total, S.A
 * Copyright (c) 2018-2024 The Board of Trustees of the Leland Stanford Junior University
 * Copyright (c) 2023-2024 Chevron
 * Copyright (c) 2019-     GEOS/GEOSX Contributors
 * All rights reserved
 *
 * See top level LICENSE, COPYRIGHT, CONTRIBUTORS, NOTICE, and ACKNOWLEDGEMENTS files for details.
 * ------------------------------------------------------------------------------------------------------------
 */
 
#ifndef GEOS_PHYSICSSOLVERS_FLUIDFLOW_SINGLEPHASE_SOLUTIONCHECKKERNEL_HPP
#define GEOS_PHYSICSSOLVERS_FLUIDFLOW_SINGLEPHASE_SOLUTIONCHECKKERNEL_HPP
 
#include "common/DataTypes.hpp"
#include "common/GEOS_RAJA_Interface.hpp"
 
namespace geos
{
 
namespace singlePhaseBaseKernels
{
 
/******************************** SolutionCheckKernel ********************************/
 
struct SolutionCheckKernel
{
  template< typename POLICY >
  static std::pair< integer, real64 > launch( arrayView1d< real64 const > const & localSolution,
                                              globalIndex const rankOffset,
                                              arrayView1d< globalIndex const > const & dofNumber,
                                              arrayView1d< integer const > const & ghostRank,
                                              arrayView1d< real64 const > const & pres,
                                              real64 const scalingFactor )
  {
    RAJA::ReduceSum< ReducePolicy< POLICY >, integer > numNegativePressures( 0 );
    RAJA::ReduceMin< ReducePolicy< POLICY >, real64 > minPres( 0.0 );
 
    forAll< POLICY >( dofNumber.size(), [=] GEOS_HOST_DEVICE ( localIndex const ei )
    {
      if( ghostRank[ei] < 0 && dofNumber[ei] >= 0 )
      {
        localIndex const lid = dofNumber[ei] - rankOffset;
        real64 const newPres = pres[ei] + scalingFactor * localSolution[lid];
 
        if( newPres < 0.0 )
        {
          numNegativePressures += 1;
          minPres.min( newPres );
        }
      }
 
    } );
 
    return { numNegativePressures.get(), minPres.get() };
  }
 
};
 
} // namespace singlePhaseBaseKernels
 
} // namespace geos
 
#endif //GEOS_PHYSICSSOLVERS_FLUIDFLOW_SINGLEPHASE_SOLUTIONCHECKKERNEL_HPP