localVelocity2D.h

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/*  This file is part of the OpenLB library
 *
 *  Copyright (C) 2024 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.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public
 *  License along with this program; if not, write to the Free
 *  Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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*/
 
//This file contains the Local Velocity Boundary
//This is a new version of the Boundary, which only contains free floating functions
 
#ifndef LOCAL_VELOCITY_2D_H
#define LOCAL_VELOCITY_2D_H
 
#include "setBoundary.h"
#include "localVelocity.h"
 
namespace olb {
 
namespace boundary {
 
template <concepts::BaseType T, concepts::LatticeDescriptor DESCRIPTOR, typename MixinDynamics>
requires (DESCRIPTOR::d == 2)
struct LocalVelocity<T,DESCRIPTOR,MixinDynamics> {
 
using value_t = T;
using descriptor_t = DESCRIPTOR;
 
CellDistance getNeighborhoodRadius() {
  return 2;
}
 
std::optional<DynamicsPromise<T,DESCRIPTOR>> getDynamics(DiscreteNormalType type,
                                                         DiscreteNormal<DESCRIPTOR> n) {
  switch (type) {
  case DiscreteNormalType::Flat:
    return boundaryhelper::PlainMixinDynamicsForDirectionOrientationMomenta<T,DESCRIPTOR,
      CombinedRLBdynamics,MixinDynamics,momenta::RegularizedVelocityBoundaryTuple
    >::construct(n);
 
  case DiscreteNormalType::ExternalCorner:
    return meta::id<typename MixinDynamics::template exchange_momenta<momenta::FixedVelocityBoundaryTuple>>{};
 
  case DiscreteNormalType::InternalCorner:
    return boundaryhelper::PlainMixinDynamicsForNormalMomenta<T,DESCRIPTOR,
      CombinedRLBdynamics,MixinDynamics,momenta::InnerCornerVelocityTuple2D
    >::construct(n);
 
  default:
    return std::nullopt;
  }
}
 
std::optional<PostProcessorPromise<T,DESCRIPTOR>> getPostProcessor(DiscreteNormalType type,
                                                                   DiscreteNormal<DESCRIPTOR> n) {
  switch (type) {
  case DiscreteNormalType::ExternalCorner:
    return boundaryhelper::promisePostProcessorForNormal<T,DESCRIPTOR,OuterVelocityCornerProcessor2D>(n);
 
  default:
    return std::nullopt;
  }
}
 
};
 
}
 
}
 
#endif