
Bookstore

Source: CFD Direct
Dimensional units
In continuum mechanics, properties are represented in some chosen units, e.g. mass in kilograms (), volume in cubic metres (
), pressure in Pascals (
). Algebraic operations must be performed on these properties using consistent units of measurement; in particular, addition, subtraction and equality are only physically meaningful for properties of the same dimensional units. As a safeguard against implementing a meaningless operation, OpenFOAM attaches dimensions to field data and physical properties and performs dimension checking on any tensor operation.
The I/O format for a dimensionSet is 7 scalars delimited by square brackets, e.g.
No. | Property | SI unit | USCS unit |
|
|
|
|
1 | Mass | kilogram (kg) | pound-mass (lbm) |
2 | Length | metre (m) | foot (ft) |
3 | Time |
— — — — second (s) — — — —
|
|
4 | Temperature | Kelvin (K) | degree Rankine (![]() |
5 | Quantity | kilogram-mole (kgmol) | pound-mole (lbmol) |
6 | Current |
— — — — ampere (A) — — — —
|
|
7 | Luminous intensity |
— — — — candela (cd) — — — —
|
|
|
|
|
|
In this tutorial, you will learn how to works the units in OpenFOAM.

OpenFOAM Tutorial | Multiphase Simulation
In this tutorial you will learn how to simulate a multiphase simulation through lockExchange tutorial that comes by default with OpenFOAM.

OpenFOAM Tutorial | motorBike (simpleFoam)
In this video you will learn how to simulate motorBike tutorial using OpenFOAM with simpleFoam solver.
Related Articles
OpenFOAM Tutorial | motorBike (simpleFoam)
In this video you will learn how to simulate motorBike tutorial using OpenFOAM with simpleFoam solver.
OpenFOAM Tutorial | How to create an Animation
In this tutorial you will learn how to create an animation using OpenFOAM through Paraview (paraFoam Command).
OpenFOAM Tutorial | pitzDaily | LES Turbulence Model
In this tutorial you will learn how to simulate the LES turbulence model using pitzDaily tutorial on OpenFOAM.
Stay Up to Date With The Latest News & Updates
Help us keep growing
CFD.NINJA is financed with its own resources, if you want to support us we will be grateful.
Join Our Newsletter
Subscribe to receive emails with detailed information related to the CFD.
Follow Us
Subscribe to our social networks to receive notifications about our new tutorials