olb::momenta::IncompressibleBulkStress Struct Reference

Standard stress computation as second moment of the population. More...

#include <elements.h>

Collaboration diagram for olb::momenta::IncompressibleBulkStress:

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

Standard stress computation as second moment of the population.

Utilizes the implementation in lbHelpers.

Definition at line 1639 of file elements.h.

Member Function Documentation

compute()

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::IncompressibleBulkStress::compute ( CELL & cell, const P & p, const U & u, PI & pi )

inline

Definition at line 1641 of file elements.h.

  {
    int iPi = 0;
    const auto rho = cell.template getField<descriptors::RHO>();
    for (int iAlpha=0; iAlpha < DESCRIPTOR::d; ++iAlpha) {
      for (int iBeta=iAlpha; iBeta < DESCRIPTOR::d; ++iBeta) {
        pi[iPi] = V();
        for (int iPop=0; iPop < DESCRIPTOR::q; ++iPop) {
          pi[iPi] += descriptors::c<DESCRIPTOR>(iPop,iAlpha)*
                     descriptors::c<DESCRIPTOR>(iPop,iBeta) * cell[iPop];
        }
        // stripe off equilibrium contribution
        pi[iPi] -= rho*u[iAlpha]*u[iBeta];
        if (iAlpha==iBeta) {
          pi[iPi] -= p;
        }
        ++iPi;
      }
    }
  }

References olb::descriptors::c().

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getName()

static std::string olb::momenta::IncompressibleBulkStress::getName ( )

inlinestatic

Definition at line 1662 of file elements.h.

                             {
    return "IncompressibleBulkStress";
  }

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

• src/dynamics/momenta/elements.h