physics::si Namespace Reference

Physical constants defined in Standard International (SI) units.

Variables
constexpr double	kStefanBoltzmann = 5.670374419e-8
	Stefan–Boltzmann constant \([\unit{\watt\per\meter\squared\kelvin\tothe{4}}]\).
constexpr double	kWaterDensityBase = 1000.0
	Standard density of water at 4°C \([\unit{\kilogram\per\meter\cubed}]\).
constexpr double	kSpecificHeatWater = 4.1796
	Specific heat of liquid water at standard conditions \([\unit{\kilo\joule\per\kilogram\per\kelvin}]\).

Variable Documentation

kSpecificHeatWater

constexpr double physics::si::kSpecificHeatWater = 4.1796

inlineconstexpr

4.1796 kJ/(kg·K) is the widely accepted value for the specific heat capacity of water at room temperature (15–25°C).

Definition at line 32 of file constants.h.

kStefanBoltzmann

constexpr double physics::si::kStefanBoltzmann = 5.670374419e-8

inlineconstexpr

Definition at line 20 of file constants.h.

kWaterDensityBase

constexpr double physics::si::kWaterDensityBase = 1000.0

inlineconstexpr

Used for water property calculations. Source: NIST, CRC Handbook of Chemistry and Physics.

Definition at line 26 of file constants.h.