Struct PowerLawWind 

pub struct PowerLawWind { /* private fields */ }

A wind whose speed grows with height above ground as a power law, from one direction:

V(z) = V_ref (z / z_ref)^α,   z = H − H_ground > 0;   V = 0 for z ≤ 0

Source: NASA/TM-2008-215633, Terrestrial Environment (Climatic) Criteria Guidelines for Use in Aerospace Vehicle Development (2008), §2.2.5.2, eq. 2.1, pinned as nasa-tm-2008-215633. There it describes peak winds below 150 m, with z_ref = 18.3 m and exponents from 0.14 to about 0.2 (Table 2-1); docs/physics/wind.md says how to choose one. Heights below ground are flagged. Heights above the surface layer are not, although the law keeps growing there: pair it with winds aloft.

Implementations

impl PowerLawWind

pub fn new( reference_speed_m_s: f64, reference_height_agl_m: f64, exponent: f64, direction_from_rad: f64, ground_msl_m: f64, ) -> Result<Self, AtmosError>

A power-law profile through reference_speed_m_s at reference_height_agl_m above a ground at ground_msl_m, with exponent exponent, blowing from direction_from_rad.

Errors

AtmosError::Domain if the speed is negative, the reference height is not positive, the exponent is negative, or any value is not finite.

pub fn reference_speed_m_s(&self) -> f64

Wind speed at the reference height, m/s.

pub fn reference_height_agl_m(&self) -> f64

Reference height above ground, m.

pub fn exponent(&self) -> f64

The exponent α.

pub fn direction_from_rad(&self) -> f64

Direction the wind blows from, in [0, 2π), rad.

pub fn ground_msl_m(&self) -> f64

Height of the ground above mean sea level, m.

Trait Implementations

impl Clone for PowerLawWind

fn clone(&self) -> PowerLawWind

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for PowerLawWind

impl Debug for PowerLawWind

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for PowerLawWind

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for PowerLawWind

fn eq(&self, other: &PowerLawWind) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for PowerLawWind

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for PowerLawWind

impl Wind for PowerLawWind

fn wind(&self, height_msl_m: f64) -> Result<WindSample, AtmosError>

The wind at geometric height height_msl_m above mean sea level.