`specfem::element::medium_tag`¶

enum class specfem::element::medium_tag¶

Element medium types for physics simulations.

Defines wave propagation physics: elastic (P/SV/SH waves), acoustic (pressure waves), poroelastic (fluid-solid interaction), and electromagnetic (TE/TM modes).

Values:

enumerator elastic_psv¶: 2D elastic medium with P and SV waves

enumerator elastic_sh¶: 2D elastic medium with SH waves

enumerator elastic_psv_t¶: 2D elastic PSV with transverse spin (Cosserat)

enumerator acoustic¶: Acoustic medium (pressure waves)

enumerator poroelastic¶: Poroelastic medium (Biot theory)

enumerator electromagnetic_te¶: 2D electromagnetic TE modes

enumerator elastic¶: 3D elastic medium (full displacement field)

enumerator elastic_spin¶: Elastic medium with spin dynamics.

enumerator electromagnetic¶: Electromagnetic medium (TE and TM modes)

`specfem::element::property_tag`¶

enum class specfem::element::property_tag¶

Material property symmetries.

Controls material tensor structure: isotropic (scalar properties), anisotropic (full tensor), isotropic_cosserat (with microrotation).

Values:

enumerator isotropic¶: Isotropic material (scalar properties)

enumerator anisotropic¶: Anisotropic material (full tensor)

enumerator isotropic_cosserat¶: Isotropic Cosserat material (with microrotation)

`specfem::element::boundary_tag`¶

enum class specfem::element::boundary_tag¶

Boundary condition types for domain edges.

Defines how waves interact with domain boundaries: free surfaces, absorbing conditions (Stacey), and composite boundary treatments.

Values:

enumerator none¶: No boundary condition.

enumerator acoustic_free_surface¶: Acoustic free surface (zero pressure)

enumerator stacey¶: Stacey absorbing boundary condition.

enumerator composite_stacey_dirichlet¶: Combined Stacey-Dirichlet boundary.

`specfem::element::to_string`¶

const std::string specfem::element::to_string(const medium_tag &medium)¶

Convert medium tag to string.

Parameters:: medium – Medium type
Returns:: String representation

const std::string specfem::element::to_string(const property_tag &property)¶

Convert property tag to string.

Parameters:: property – Property type
Returns:: String representation

const std::string specfem::element::to_string(const boundary_tag &boundary)¶

Convert boundary tag to string.

Parameters:: boundary – Boundary condition type
Returns:: String representation

const std::string specfem::element::to_string(const medium_tag &medium, const property_tag &property_tag)¶

Convert medium and property tags to string.

Parameters:

medium – Medium type
property_tag – Property type

Returns:

Combined string representation

const std::string specfem::element::to_string(const medium_tag &medium, const property_tag &property_tag, const boundary_tag &boundary_tag)¶

Convert medium, property, and boundary tags to string.

Parameters:

medium – Medium type
property_tag – Property type
boundary_tag – Boundary condition type

Returns:

Combined string representation

`specfem::element::attributes`¶

template<specfem::dimension::type Dimension, specfem::element::medium_tag MediumTag> class attributes¶

Element physics attributes for different media.

Template specializations define field components, physics flags, and computational requirements for each medium type.

// Get attributes for 2D elastic PSV medium
using attrs = specfem::element::attributes<
  specfem::dimension::type::dim2,
  specfem::element::medium_tag::elastic_psv>;
static_assert(attrs::components == 2); // u_x, u_z components
static_assert(attrs::dimension == 2);

Template Parameters:

Dimension – Spatial dimension (2D or 3D)
MediumTag – Medium physics type

Attribute Specializations¶

template<> class attributes<specfem::dimension::type::dim2, specfem::element::medium_tag::elastic_psv>¶

Attributes for 2D elastic PSV waves (P and SV components).

Handles in-plane wave propagation with displacement components u_x and u_z.

Public Static Attributes

static constexpr int dimension = 2¶: Spatial dimension.

static constexpr int components = 2¶: Field components (u_x, u_z)

static constexpr bool has_damping_force = false¶: No damping physics.

static constexpr bool has_cosserat_stress = false¶: No Cosserat stress.

static constexpr bool has_cosserat_couple_stress = false¶: No couple stress.

template<> class attributes<specfem::dimension::type::dim2, specfem::element::medium_tag::elastic_sh>¶

Attributes for 2D elastic SH waves (out-of-plane shear).

Handles anti-plane wave propagation with single displacement component u_y.

Public Static Attributes

static constexpr int dimension = 2¶: Spatial dimension.

static constexpr int components = 1¶: Field components (u_y)

static constexpr bool has_damping_force = false¶: No damping physics.

static constexpr bool has_cosserat_stress = false¶: No Cosserat stress.

static constexpr bool has_cosserat_couple_stress = false¶: No couple stress.

template<> class attributes<specfem::dimension::type::dim2, specfem::element::medium_tag::acoustic>¶

Attributes for 2D acoustic waves (pressure field).

Handles compressional wave propagation in fluid media with scalar pressure.

Public Static Attributes

static constexpr int dimension = 2¶: Spatial dimension.

static constexpr int components = 1¶: Field components (pressure)

static constexpr bool has_damping_force = false¶: No damping physics.

static constexpr bool has_cosserat_stress = false¶: No Cosserat stress.

static constexpr bool has_cosserat_couple_stress = false¶: No couple stress.

template<> class attributes<specfem::dimension::type::dim2, specfem::element::medium_tag::poroelastic>¶

Attributes for 2D poroelastic media (Biot theory).

Couples solid skeleton and fluid flow with displacement and pressure fields. Components: solid displacement (u_s^x, u_s^z) and relative fluid motion (w^x, w^z).

Public Static Attributes

static constexpr int dimension = 2¶: Spatial dimension.

static constexpr int components = 4¶: Field components (u_s^x, u_s^z, w^x, w^z)

static constexpr bool has_damping_force = true¶: Has fluid damping.

static constexpr bool has_cosserat_stress = false¶: No Cosserat stress.

static constexpr bool has_cosserat_couple_stress = false¶: No couple stress.

template<> class attributes<specfem::dimension::type::dim2, specfem::element::medium_tag::elastic_psv_t>¶

Attributes for 2D elastic PSV with transverse spin (Cosserat medium).

Extends PSV waves with microrotation physics for granular/micropolar materials. Includes displacement (u_x, u_z) and rotation (ω_y) components.

Public Static Attributes

static constexpr int dimension = 2¶: Spatial dimension.

static constexpr int components = 3¶: Field components (u_x, u_z, ω_y)

static constexpr bool has_damping_force = false¶: No damping physics.

static constexpr bool has_cosserat_stress = true¶: Has Cosserat stress.

static constexpr bool has_cosserat_couple_stress = true¶: Has couple stress.

template<> class attributes<specfem::dimension::type::dim2, specfem::element::medium_tag::electromagnetic_te>¶

Attributes for 2D electromagnetic TE waves (transverse electric).

Handles electromagnetic wave propagation with electric field components E_x and E_y.

Public Static Attributes

static constexpr int dimension = 2¶: Spatial dimension.

static constexpr int components = 2¶: Field components (E_x, E_y)

static constexpr bool has_damping_force = false¶: No damping physics.

static constexpr bool has_cosserat_stress = false¶: No Cosserat stress.

static constexpr bool has_cosserat_couple_stress = false¶: No couple stress.

template<> class attributes<specfem::dimension::type::dim3, specfem::element::medium_tag::elastic>¶

Attributes for 3D elastic waves (full displacement field).

Handles 3D elastic wave propagation with displacement components u_x, u_y, u_z.

Public Static Attributes

static constexpr int dimension = 3¶: Spatial dimension.

static constexpr int components = 3¶: Field components (u_x, u_y, u_z)

static constexpr bool has_damping_force = false¶: No damping physics.

static constexpr bool has_cosserat_stress = false¶: No Cosserat stress.

static constexpr bool has_cosserat_couple_stress = false¶: No couple stress.

template<> class attributes<specfem::dimension::type::dim3, specfem::element::medium_tag::acoustic>¶

Attributes for 3D acoustic waves (pressure field).

Handles compressional wave propagation in 3D fluid media with scalar pressure.

Public Static Attributes

static constexpr int dimension = 3¶: Spatial dimension.

static constexpr int components = 1¶: Field components (pressure)

static constexpr bool has_damping_force = false¶: No damping physics.

static constexpr bool has_cosserat_stress = false¶: No Cosserat stress.

static constexpr bool has_cosserat_couple_stress = false¶: No couple stress.

`specfem::element::from_string`¶

specfem::element::medium_tag specfem::element::from_string(const std::string &medium_tag)¶

Parse medium tag from string representation.

Parameters:: medium_tag – String representation of medium type
Throws:: std::runtime_error – if string is not recognized
Returns:: Corresponding medium_tag enumeration value

`specfem::element::is_elastic`¶

template<specfem::element::medium_tag MediumTag> using specfem::element::is_elastic = typename std::conditional_t<(MediumTag == specfem::element::medium_tag::elastic || MediumTag == specfem::element::medium_tag::elastic_psv || MediumTag == specfem::element::medium_tag::elastic_sh || MediumTag == specfem::element::medium_tag::elastic_psv_t), std::true_type, std::false_type>::type¶

Type trait to identify elastic media.

static_assert(is_elastic<medium_tag::elastic_psv>::value);
static_assert(!is_elastic<medium_tag::acoustic>::value);

Template Parameters:: MediumTag – Medium type to check
Return:: std::true_type if elastic, std::false_type otherwise

`specfem::element::is_electromagnetic`¶

template<specfem::element::medium_tag MediumTag> using specfem::element::is_electromagnetic = typename std::conditional_t<(MediumTag == specfem::element::medium_tag::electromagnetic || MediumTag == specfem::element::medium_tag::electromagnetic_te), std::true_type, std::false_type>::type¶

Type trait to identify electromagnetic media.

Template Parameters:: MediumTag – Medium type to check
Return:: std::true_type if electromagnetic, std::false_type otherwise

specfem::element::medium_tag¶

specfem::element::property_tag¶

specfem::element::boundary_tag¶

specfem::element::to_string¶

specfem::element::attributes¶

Attribute Specializations¶

specfem::element::from_string¶

specfem::element::is_elastic¶

specfem::element::is_electromagnetic¶

`specfem::element::medium_tag`¶

`specfem::element::property_tag`¶

`specfem::element::boundary_tag`¶

`specfem::element::to_string`¶

`specfem::element::attributes`¶

`specfem::element::from_string`¶

`specfem::element::is_elastic`¶

`specfem::element::is_electromagnetic`¶