Opm::unit Namespace Reference
Definition of various units. More...
Namespaces | |
| convert | |
| Unit conversion routines. | |
Functions | |
Common powers | |
| constexpr double | square (double v) |
| constexpr double | cubic (double v) |
Variables | |
| constexpr double | mol = 1 |
| constexpr double | ppm = 1. / prefix::mega |
Length | |
| constexpr double | meter = 1 |
| constexpr double | inch = 2.54 * prefix::centi*meter |
| constexpr double | feet = 12 * inch |
Time | |
| constexpr double | second = 1 |
| constexpr double | minute = 60 * second |
| constexpr double | hour = 60 * minute |
| constexpr double | day = 24 * hour |
| constexpr double | year = 365 * day |
| constexpr double | ecl_year = 365.25 * day |
Volume | |
| constexpr double | gallon = 231 * cubic(inch) |
| constexpr double | stb = 42 * gallon |
| constexpr double | liter = 1 * cubic(prefix::deci*meter) |
Mass | |
| constexpr double | kilogram = 1 |
| constexpr double | gram = 1.0e-3 * kilogram |
| constexpr double | pound = 0.45359237 * kilogram |
Energy | |
| constexpr double | joule = 1 |
| constexpr double | btu = 1054.3503*joule |
Standardised constant | |
| constexpr double | gravity = 9.80665 * meter/square(second) |
Force | |
| constexpr double | Newton = kilogram*meter / square(second) |
| constexpr double | dyne = 1e-5*Newton |
| constexpr double | lbf = pound * gravity |
Pressure | |
| constexpr double | Pascal = Newton / square(meter) |
| constexpr double | barsa = 100000 * Pascal |
| constexpr double | bars = 100000 * Pascal |
| constexpr double | atma = 101325 * Pascal |
| constexpr double | atm = 101325 * Pascal |
| constexpr double | psia = lbf / square(inch) |
| constexpr double | psi = lbf / square(inch) |
Temperature. This one is more complicated | |
because the unit systems used by Eclipse (i.e. degrees Celsius and degrees Fahrenheit require to add or subtract an offset for the conversion between from/to Kelvin | |
| constexpr double | degCelsius = 1.0 |
| constexpr double | degCelsiusOffset = 273.15 |
| constexpr double | degFahrenheit = 5.0/9.0 |
| constexpr double | degFahrenheitOffset = 459.67*degFahrenheit |
Viscosity | |
| constexpr double | Pas = Pascal * second |
| constexpr double | Poise = prefix::deci*Pas |
Permeability | |
A porous medium with a permeability of 1 darcy permits a flow (flux) of | |
| constexpr double | darcy = perm_details::darcy |
of a fluid with viscosity 
( 
) under a pressure gradient of 
acting across an area of 
. Detailed Description
Definition of various units.
All the units are defined in terms of international standard units (SI). Example of use: We define a variable k which gives a permeability. We want to set k to 
.
using namespace Opm::unit
double k = 0.001*darcy;
We can also use one of the prefixes defined in Opm::prefix
