advectionDiffusionDirichlet2D.h

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/*  This file is part of the OpenLB library
 *
 *  Copyright (C) 2024 Fedor Bukreev, Adrian Kummerlaender
 *  E-mail contact: info@openlb.net
 *  The most recent release of OpenLB can be downloaded at
 *  <http://www.openlb.net/>
 *
 *  This program is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU General Public License
 *  as published by the Free Software Foundation; either version 2
 *  of the License, or (at your option) any later version.
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 *  This program is distributed in the hope that it will be useful,
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 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
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*/
 
#ifndef OLB_ADVECTION_DIFFUSION_DIRICHLET_2D_H
#define OLB_ADVECTION_DIFFUSION_DIRICHLET_2D_H
 
#include "setBoundary.h"
#include "advectionDiffusionDirichlet.h"
 
namespace olb {
 
namespace boundary {
 
template <concepts::BaseType T, concepts::LatticeDescriptor DESCRIPTOR, typename MixinDynamics>
requires (DESCRIPTOR::d == 2)
struct AdvectionDiffusionDirichlet<T,DESCRIPTOR,MixinDynamics> {
 
using value_t = T;
using descriptor_t = DESCRIPTOR;
 
CellDistance getNeighborhoodRadius() {
  return 1;
}
 
std::optional<DynamicsPromise<T,DESCRIPTOR>> getDynamics(DiscreteNormalType type,
                                                         DiscreteNormal<DESCRIPTOR> n) {
  switch (type) {
  case DiscreteNormalType::Flat:
    return boundaryhelper::DirectionOrientationMixinDynamicsForPlainMomenta<T,DESCRIPTOR,
          AdvectionDiffusionBoundariesDynamics,MixinDynamics,momenta::EquilibriumBoundaryTuple
    >::construct(n);
 
  case DiscreteNormalType::ExternalCorner:
    return boundaryhelper::NormalMixinDynamicsForPlainMomenta<T,DESCRIPTOR,
          AdvectionDiffusionCornerDynamics2D,MixinDynamics,momenta::EquilibriumBoundaryTuple
    >::construct(n);
 
  default:
    throw std::runtime_error("No valid discrete normal found. This BC is not suited for curved walls.");
  }
}
 
std::optional<PostProcessorPromise<T,DESCRIPTOR>> getPostProcessor(DiscreteNormalType type,
                                                                   DiscreteNormal<DESCRIPTOR> n) {
    return std::nullopt;
  }
 
};
 
}
 
}
 
#endif