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Merge pull request #724 from Yashmandaokar/SharedTurbulenceModel
Implementation of Standard k-ε Turbulence Model within ESPH
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tests/extra_source_and_tests/extra_src/for_2D_build/turbulence_model.cpp
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| #ifndef TURBULENCEMODEL_CPP | ||
| #define TURBULENCEMODEL_CPP | ||
| #include "turbulence_model.h" | ||
| #include "sphinxsys.h" | ||
| namespace SPH | ||
| { | ||
| namespace fluid_dynamics | ||
| { | ||
| //=================================================================================================// | ||
| BaseTurbulence::BaseTurbulence(BaseInnerRelation& inner_relation, GhostCreationFromMesh& ghost_creator) | ||
| : BaseIntegration<DataDelegateInner>(inner_relation), | ||
| mom_(this->particles_->template getVariableDataByName<Vecd>("Momentum")), | ||
| dmom_dt_(this->particles_->template getVariableDataByName<Vecd>("MomentumChangeRate")), | ||
| dmass_dt_(this->particles_->template getVariableDataByName<Real>("MassChangeRate")), | ||
| K_prod_p_(this->particles_->template registerStateVariable<Real>("TKEProductionInWallAdjCell")), | ||
| K_prod_(this->particles_->template registerStateVariable<Real>("TKEProduction")), | ||
| Eps_p_(this->particles_->template registerStateVariable<Real>("DissipationRateInWallAdjCell")), | ||
| Tau_wall_(this->particles_->template registerStateVariable<Real>("WallShearStress")), | ||
| C_mu_(0.09), sigma_k_(1.0), sigma_eps_(1.3), C1_eps_(1.44), C2_eps_(1.92), | ||
| K_(this->particles_->template getVariableDataByName<Real>("TKE")), | ||
| Eps_(this->particles_->template getVariableDataByName<Real>("Dissipation")), | ||
| mu_t_(this->particles_->template getVariableDataByName<Real>("TurblunetViscosity")), | ||
| ghost_creator_(ghost_creator), | ||
| viscosity_(DynamicCast<Viscosity>(this, particles_->getBaseMaterial())) | ||
| {} | ||
| //=================================================================================================// | ||
| WallAdjacentCells::WallAdjacentCells(BaseInnerRelation &inner_relation, GhostCreationFromMesh &ghost_creator) | ||
| : BaseTurbulence(inner_relation, ghost_creator), wall_normal_(this->particles_->template registerStateVariable<Vecd>("WallNormal")), | ||
| wall_adjacent_cell_flag_(this->particles_->template registerStateVariable<Real>("FlagForWallAdjacentCells")), | ||
| yp_(this->particles_->template registerStateVariable<Real>("WallNormalDistance")), | ||
| ymax_(0.0) | ||
| { | ||
| walladjacentcellyp(); | ||
| } | ||
| //=================================================================================================// | ||
| void WallAdjacentCells::walladjacentcellyp() | ||
| { | ||
| wall_adjacent_index_.resize(particles_->ParticlesBound()); | ||
| wall_ghost_index_.resize(particles_->ParticlesBound()); | ||
| wall_eij_.resize(particles_->ParticlesBound()); | ||
|
|
||
| for (size_t boundary_type = 0; boundary_type < ghost_creator_.each_boundary_type_with_all_ghosts_index_.size(); ++boundary_type) | ||
| { | ||
| if (!ghost_creator_.each_boundary_type_with_all_ghosts_index_[boundary_type].empty()) | ||
| { | ||
| for (size_t ghost_number = 0; ghost_number != ghost_creator_.each_boundary_type_with_all_ghosts_index_[boundary_type].size(); ++ghost_number) | ||
| { | ||
| size_t ghost_index = ghost_creator_.each_boundary_type_with_all_ghosts_index_[boundary_type][ghost_number]; | ||
| size_t index_real = ghost_creator_.each_boundary_type_contact_real_index_[boundary_type][ghost_number]; | ||
| wall_eij_[index_real] = ghost_creator_.each_boundary_type_with_all_ghosts_eij_[boundary_type][ghost_number]; | ||
|
|
||
| if (boundary_type == 3) | ||
| { | ||
| wall_adjacent_index_[index_real] = index_real; | ||
| wall_ghost_index_[index_real] = ghost_index; | ||
| wall_adjacent_cell_flag_[index_real] = 1.0; | ||
| if ((pos_[index_real] - pos_[ghost_index]).dot(wall_eij_[index_real]) > ymax_) | ||
| { | ||
| ymax_ = (pos_[index_real] - pos_[ghost_index]).dot(wall_eij_[index_real]); | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } | ||
| //=================================================================================================// | ||
| void WallAdjacentCells::update(size_t index_i, Real dt) | ||
| { | ||
| Vecd lower_wall = {pos_[index_i][0], 0.0}; | ||
| Vecd upper_wall = {pos_[index_i][0], 2.0}; | ||
| Vecd lower_wall_normal = {0.0, 1.0}; | ||
| Vecd upper_wall_normal = {0.0, -1.0}; | ||
|
|
||
| bool lower_wall_condition = ((pos_[index_i] - lower_wall).dot(lower_wall_normal) <= 1.0 * ymax_); | ||
| bool upper_wall_condition = ((pos_[index_i] - upper_wall).dot(upper_wall_normal) <= 1.0 * ymax_); | ||
|
|
||
| if (lower_wall_condition) | ||
| { | ||
| yp_[index_i] = (pos_[index_i] - lower_wall).dot(lower_wall_normal); | ||
| wall_normal_[index_i] = lower_wall_normal; | ||
| } | ||
| else if (upper_wall_condition) | ||
| { | ||
| yp_[index_i] = (pos_[index_i] - upper_wall).dot(upper_wall_normal); | ||
| wall_normal_[index_i] = upper_wall_normal; | ||
| } | ||
| } | ||
| //=================================================================================================// | ||
| StdWallFunctionFVM::StdWallFunctionFVM(BaseInnerRelation &inner_relation, GhostCreationFromMesh &ghost_creator) | ||
| : BaseTurbulence(inner_relation, ghost_creator), y_star_(this->particles_->template registerStateVariable<Real>("Ystar")), | ||
| yp_(this->particles_->template getVariableDataByName<Real>("WallNormalDistance")), | ||
| wall_normal_(this->particles_->template getVariableDataByName<Vecd>("WallNormal")), | ||
| vel_gradient_mat_(this->particles_->template registerStateVariable<Matd>("VelocityGradient")), | ||
| von_kar_(0.4187), E_(9.793) | ||
| {} | ||
| //=================================================================================================// | ||
| void StdWallFunctionFVM::nearwallquantities(size_t index_i) | ||
| { | ||
| y_star_[index_i] = (rho_[index_i] * std::pow(C_mu_, 0.25) * std::pow(K_[index_i], 0.5) * yp_[index_i]) / (viscosity_.ReferenceViscosity()); | ||
| Real u_star; | ||
| Vecd veltangential = (vel_[index_i] - wall_normal_[index_i].dot(vel_[index_i]) * (wall_normal_[index_i])); | ||
|
|
||
| if (y_star_[index_i] >= 11.225) | ||
| { | ||
| u_star = (1.0 / von_kar_) * std::log(E_ * y_star_[index_i]); | ||
| mu_t_[index_i] = viscosity_.ReferenceViscosity() * ((y_star_[index_i]) / (1 / von_kar_ * std::log(E_ * y_star_[index_i])) - 1.0); | ||
|
|
||
| Tau_wall_[index_i] = (veltangential.norm() * std::pow(C_mu_, 0.25) * std::pow(K_[index_i], 0.5) * rho_[index_i]) / (u_star); | ||
| vel_gradient_mat_[index_i] = Matd::Zero(); | ||
| vel_gradient_mat_[index_i](0, 1) = Tau_wall_[index_i] / (rho_[index_i] * pow(C_mu_, 0.25) * pow(K_[index_i], 0.5) * von_kar_ * yp_[index_i]); | ||
|
|
||
| K_prod_p_[index_i] = std::pow(Tau_wall_[index_i], 2.0) / (von_kar_ * rho_[index_i] * std::pow(C_mu_, 0.25) * std::pow(K_[index_i], 0.5) * yp_[index_i]); | ||
| Eps_p_[index_i] = (std::pow(C_mu_, 3.0 / 4.0) * std::pow(K_[index_i], 1.5)) / (von_kar_ * yp_[index_i]); | ||
|
|
||
| } | ||
| else if (y_star_[index_i] < 11.225) | ||
| { | ||
| u_star = y_star_[index_i]; | ||
| Tau_wall_[index_i] = viscosity_.ReferenceViscosity() * veltangential.norm() / yp_[index_i]; | ||
| vel_gradient_mat_[index_i] = Matd::Zero(); | ||
| vel_gradient_mat_[index_i](0, 1) = Tau_wall_[index_i] / viscosity_.ReferenceViscosity(); | ||
| K_prod_p_[index_i] = 0.0; | ||
| Eps_p_[index_i] = (K_[index_i] * 2.0 * viscosity_.ReferenceViscosity()) / (rho_[index_i] * yp_[index_i] * yp_[index_i]); | ||
| } | ||
| } | ||
| //=================================================================================================// | ||
| }// namespace fluid_dynamics | ||
|
|
||
| }// namespace SPH | ||
| #endif // TURBULENCEMODEL_CPP |
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