olb::momenta::ForcedIncompressibleStress< STRESS > Struct Template Reference

#include <elements.h>

Collaboration diagram for olb::momenta::ForcedIncompressibleStress< STRESS >:

Public Member Functions
template<typename TYPE , typename CELL , typename P , typename U , typename PI , typename V = typename CELL::value_t, typename DESCRIPTOR = typename CELL::descriptor_t>
void	compute (CELL &cell, const P &p, const U &u, PI &pi) any_platform

Static Public Member Functions
static std::string	getName ()

Detailed Description

template<typename STRESS>
struct olb::momenta::ForcedIncompressibleStress< STRESS >

Definition at line 1847 of file elements.h.

Member Function Documentation

compute()

template<typename STRESS >

template<typename TYPE , typename CELL , typename P , typename U , typename PI , typename V = typename CELL::value_t, typename DESCRIPTOR = typename CELL::descriptor_t>

void olb::momenta::ForcedIncompressibleStress< STRESS >::compute ( CELL & cell, const P & p, const U & u, PI & pi )

inline

Definition at line 1849 of file elements.h.

  {
    V uNew[DESCRIPTOR::d] { };
    const auto force = cell.template getFieldPointer<descriptors::FORCE>();
    const auto partialRho = cell.template getFieldPointer<descriptors::NABLARHO>();
    for (unsigned iD=0; iD < DESCRIPTOR::d; ++iD) {
      uNew[iD] = u[iD] - V{0.5} * force[iD];
    }
    STRESS().template compute<TYPE>(cell, p, uNew, pi);
    V forceTensor[util::TensorVal<DESCRIPTOR>::n];
    int iPi = 0;
    for (int iAlpha=0; iAlpha < DESCRIPTOR::d; ++iAlpha) {
      for (int iBeta=iAlpha; iBeta < DESCRIPTOR::d; ++iBeta) {
        forceTensor[iPi] = V{0.5} /descriptors::invCs2<V,DESCRIPTOR>() * (partialRho[iAlpha]*uNew[iBeta] + uNew[iAlpha]*partialRho[iBeta]);
        if (iAlpha == iBeta) forceTensor[iPi] += V{0.5} /descriptors::invCs2<V,DESCRIPTOR>() * partialRho[iAlpha]*uNew[iAlpha];
        ++iPi;
      }
    }
    // Creation of second-order moment off-equilibrium tensor
    for (int iPi=0; iPi < util::TensorVal<DESCRIPTOR>::n; ++iPi) {
      pi[iPi] += forceTensor[iPi];
    }
  }

References olb::momenta::ForcedIncompressibleStress< STRESS >::compute(), and olb::descriptors::invCs2().

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getName()

template<typename STRESS >

static std::string olb::momenta::ForcedIncompressibleStress< STRESS >::getName ( )

inlinestatic

Definition at line 1873 of file elements.h.

                             {
    return "ForcedIncompressibleStress<" + STRESS().getName() + ">";
  }

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The documentation for this struct was generated from the following file:

• src/dynamics/momenta/elements.h