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initial implementation of a generalized ERF particle interface; retai…
…ned tracer and hydro particles as specific types; added uniform distribution of particles as an initialization option
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,173 @@ | ||
| #ifndef ERF_PC_H_ | ||
| #define ERF_PC_H_ | ||
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| #ifdef ERF_USE_PARTICLES | ||
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| #include <string> | ||
| #include <AMReX_Particles.H> | ||
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| struct ERFParticlesRealIdx | ||
| { | ||
| enum { | ||
| vx = 0, | ||
| vy, | ||
| vz, | ||
| mass, | ||
| ncomps | ||
| }; | ||
| }; | ||
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| struct ERFParticlesIntIdx | ||
| { | ||
| enum { | ||
| i = 0, | ||
| j, | ||
| k, | ||
| ncomps | ||
| }; | ||
| }; | ||
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| namespace ERFParticleInitializations | ||
| { | ||
| /* list of particle initializations */ | ||
| const std::string init_default = "default"; | ||
| const std::string init_uniform = "uniform"; | ||
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| } | ||
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| namespace ERFParticleNames | ||
| { | ||
| const std::string tracers = "tracer_particles"; | ||
| const std::string hydro = "hydro_particles"; | ||
| } | ||
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| struct ERFParticlesAssignor | ||
| { | ||
| template <typename P> | ||
| AMREX_GPU_HOST_DEVICE | ||
| amrex::IntVect operator() ( P const& p, | ||
| amrex::GpuArray<amrex::Real,AMREX_SPACEDIM> const& plo, | ||
| amrex::GpuArray<amrex::Real,AMREX_SPACEDIM> const& dxi, | ||
| const amrex::Box& domain ) const noexcept | ||
| { | ||
| /* TODO: What is this about? */ | ||
| amrex::IntVect iv( | ||
| AMREX_D_DECL( int(amrex::Math::floor((p.pos(0)-plo[0])*dxi[0])), | ||
| int(amrex::Math::floor((p.pos(1)-plo[1])*dxi[1])), | ||
| p.idata(ERFParticlesIntIdx::k) ) ); | ||
| iv[0] += domain.smallEnd()[0]; | ||
| iv[1] += domain.smallEnd()[1]; | ||
| return iv; | ||
| } | ||
| }; | ||
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| class ERFPC : public amrex::ParticleContainer< ERFParticlesRealIdx::ncomps, | ||
| ERFParticlesIntIdx::ncomps, | ||
| 0, | ||
| 0, | ||
| amrex::DefaultAllocator, | ||
| ERFParticlesAssignor > | ||
| { | ||
| public: | ||
|
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| /*! Constructor */ | ||
| ERFPC ( amrex::ParGDBBase* a_gdb, | ||
| const std::string& a_name = "particles" ) | ||
| : amrex::ParticleContainer< ERFParticlesRealIdx::ncomps, | ||
| ERFParticlesIntIdx::ncomps, | ||
| 0, | ||
| 0, | ||
| amrex::DefaultAllocator, | ||
| ERFParticlesAssignor> (a_gdb) | ||
| { | ||
| BL_PROFILE("ERFPCPC::ERFPC()"); | ||
| m_name = a_name; | ||
| readInputs(); | ||
| } | ||
|
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| /*! Constructor */ | ||
| ERFPC ( const amrex::Geometry& a_geom, | ||
| const amrex::DistributionMapping& a_dmap, | ||
| const amrex::BoxArray& a_ba, | ||
| const std::string& a_name = "particles" ) | ||
| : amrex::ParticleContainer< ERFParticlesRealIdx::ncomps, | ||
| ERFParticlesIntIdx::ncomps, | ||
| 0, | ||
| 0, | ||
| amrex::DefaultAllocator, | ||
| ERFParticlesAssignor> ( a_geom, a_dmap, a_ba ) | ||
| { | ||
| BL_PROFILE("ERFPCPC::ERFPC()"); | ||
| m_name = a_name; | ||
| readInputs(); | ||
| } | ||
|
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| /*! Initialize particles in domain */ | ||
| virtual void InitializeParticles(const std::unique_ptr<amrex::MultiFab>& a_ptr = nullptr); | ||
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| /*! Evolve particles for one time step */ | ||
| virtual void EvolveParticles( int, | ||
| amrex::Real, | ||
| amrex::Vector<amrex::Vector<amrex::MultiFab>>&, | ||
| const amrex::Vector<std::unique_ptr<amrex::MultiFab>>& ); | ||
|
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| /*! Get real-type particle attribute names */ | ||
| virtual amrex::Vector<std::string> varNames() const | ||
| { | ||
| BL_PROFILE("ERFPCPC::varNames()"); | ||
| return {AMREX_D_DECL("xvel","yvel","zvel"),"mass"}; | ||
| } | ||
|
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| /*! Specify if particles should advect with flow */ | ||
| inline void setAdvectWithFlow (bool a_flag) | ||
| { | ||
| BL_PROFILE("ERFPCPC::setAdvectWithFlow()"); | ||
| m_advect_w_flow = a_flag; | ||
| } | ||
| /*! Specify if particles fall under gravity */ | ||
| inline void setAdvectWithGravity (bool a_flag) | ||
| { | ||
| BL_PROFILE("ERFPCPC::setAdvectWithGravity()"); | ||
| m_advect_w_gravity = a_flag; | ||
| } | ||
|
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| protected: | ||
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| bool m_advect_w_flow; /*!< advect with flow velocity */ | ||
| bool m_advect_w_gravity; /*!< advect under gravitational force */ | ||
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| std::string m_name; /*!< name of this particle species */ | ||
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| std::string m_initialization_type; /*!< initial particle distribution type */ | ||
| int m_ppc_init; /*!< initial number of particles per cell */ | ||
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| /*! read inputs from file */ | ||
| virtual void readInputs(); | ||
|
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| /*! Default particle initialization */ | ||
| void initializeParticlesUniformDistribution(const std::unique_ptr<amrex::MultiFab>& a_ptr = nullptr); | ||
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| /*! Uses midpoint method to advance particles using flow velocity. */ | ||
| void AdvectWithFlow( amrex::MultiFab*, | ||
| int, | ||
| amrex::Real, | ||
| const std::unique_ptr<amrex::MultiFab>& ); | ||
|
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| /*! Uses midpoint method to advance particles falling under gravity. */ | ||
| void AdvectWithGravity( int, | ||
| amrex::Real, | ||
| const std::unique_ptr<amrex::MultiFab>& ); | ||
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| private: | ||
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| /*! Default particle initialization */ | ||
| void initializeParticlesDefault(const std::unique_ptr<amrex::MultiFab>& a_ptr = nullptr); | ||
| /*! Default initialization for tracer particles for WoA case (ref: AA) */ | ||
| void initializeParticlesDefaultTracersWoA(const std::unique_ptr<amrex::MultiFab>& a_ptr=nullptr); | ||
| /*! Default initialization for hydro particles (ref: AA) */ | ||
| void initializeParticlesDefaultHydro(const std::unique_ptr<amrex::MultiFab>& a_ptr = nullptr); | ||
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| }; | ||
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| #endif | ||
| #endif |
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