Superdrop Attributes

Header file: <libs/superdrops/superdrop_attrs.hpp> [source]

struct SoluteProperties

Struct representing the properties of solute in a super-droplet.

Public Functions

inline constexpr double rho_sol() const

Get the density of solute (dimensionless).

Returns:

Solute density.

inline constexpr double mr_sol() const

Get the molecular mass of solute (dimensionless).

Returns:

The molecular mass of solute.

inline constexpr double ionic() const

Get the degree ionic dissociation (van’t Hoff factor) (dimensionless).

Returns:

The degree ionic dissociation.

struct SuperdropAttrs

Struct representing the attributes of a super-droplet.

Public Functions

SuperdropAttrs() = default

Default constructor requirement for use of SuperdropAttrs in Kokkos View.

~SuperdropAttrs() = default

Default destructor requirement for use of SuperdropAttrs in Kokkos View.

inline SuperdropAttrs(const SoluteProperties solute, const uint64_t xi, const double radius, const double msol)

Constructor with parameters.

Parameters:

• solute – The solute properties.

• xi – The multiplicity of superdroplet.

• radius – The radius of superdroplet.

• msol – The mass of solute dissolved.

inline bool is_solute() const

Check if solute is present.

Returns:

True

inline auto get_solute() const

Get the solute properties.

Returns:

The solute properties.

inline auto get_rho_sol() const

Get the density of solute.

Returns:

The solute density.

inline auto get_mr_sol() const

Get the molecular mass of the solute.

Returns:

The molecular mass of the solute.

inline auto get_ionic() const

Get the degree ionic dissociation (van’t Hoff factor).

Returns:

The ionic dissociation (van’t Hoff factor).

inline void set_xi(const uint64_t i_xi)

Set the multiplicity of superdroplet.

Set the multiplicity ‘xi’ of the superdroplet with assert that new xi >= 1.

Parameters:

i_xi – The multiplicity to set.

inline void set_radius(const double i_radius)

Set the radius of the super-droplet.

This function sets the value of the super-droplet’s radius to the specified value with assert that new radius >= dry radius within 10^(-6) micron tolerance.

Note: See also change_radius which limits super-droplet radius to its dry radius.

Parameters:

i_radius – The value to set for radius.

inline void set_msol(const double i_msol)

Sets the value of the super-droplet’s mass of solute.

This function sets the value of the super-droplet’s solute mass to the specified value.

Parameters:

i_msol – The value to set for msol.

double mass() const

Get the total droplet mass.

Calculates and returns total droplet mass = water + dry areosol.

Returns:

The total droplet mass.

inline double dryradius() const

Get the dry radius of droplet.

Calculate radius as if droplet is dry, ie. radius if droplet was only made of its solute mass

Returns:

The dry radius of droplet.

inline double rcubed() const

Get the cubed radius of droplet.

Returns:

The cubed radius of droplet.

inline double vol() const

Get the spherical volume of droplet.

Volume as if droplet is sphere given its radius.

Returns:

The spherical volume of droplet.

double change_radius(const double newr)

Change the radius of droplet.

Update droplet radius to larger out of new radius ‘newr’ or dry radius and return the resultant change in radius = new radius - old radius. Prevents drops shrinking further once they are size of dry radius.

Parameters:

newr – The new radius to set.

Returns:

The change in radius.

Public Members

SoluteProperties solute

instance of SoluteProperties for pointer-like reference to superdrop’s solute properties.

uint64_t xi

Multiplicity of superdrop.

double radius

Radius of superdrop.

double msol

Mass of solute dissolved in superdrop.