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OpenFOAM – Units

#### 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.

[0 2 -1 0 0 0 0]

 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 (R) 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.

## Convert Photography to Mesh using Gmsh

Learn how to generate a CFD mesh from any photograph using the Gmsh mesher.

## 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 | 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.

## OpenFOAM Tutorial | How to create an Animation

In this tutorial you will learn how to create an animation using OpenFOAM through Paraview (paraFoam Command).

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