Struct Environment 

pub struct Environment {
    pub ambient: Temperature,
    pub convection_w_per_m2_k: f64,
    pub area: Area,
}

How a body loses heat to its surroundings.

Fields

ambient: Temperature

The temperature the surroundings sit at, and what a body relaxes towards.

convection_w_per_m2_k: f64

Convective coefficient h, W·m⁻²·K⁻¹. Still air is about 5 to 10; forced air 25 to 100; water hundreds. There is no right default, so there is no default.

area: Area

Surface area available to lose heat through.

Implementations

impl Environment

pub fn still_air(ambient: Temperature, area: Area) -> Environment

A part sitting in still room air.

pub fn loss_from(&self, temperature: Temperature, emissivity: f64) -> Power

Power lost from a surface at temperature, convective plus radiative.

The radiative term is εσA(T⁴ - T_a⁴), and it is the only non-linearity in this crate. It is also not negligible: at room temperature a black surface radiates about 6 W·m⁻²·K⁻¹, which is the same order as still-air convection, so leaving it out halves the loss.

Trait Implementations

impl Clone for Environment

fn clone(&self) -> Environment

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Environment

impl Debug for Environment

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

Formats the value using the given formatter.

impl PartialEq for Environment

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Environment