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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.

## 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.

## OpenFOAM Tutorial | Airfoil 2D

In this tutorial, you will learn how to simulate an Airfoil 2D using OpenFOAM. In this case, we will use the folder that comes by default.

## OpenFOAM Tutorial | Allclean & Allrun Sripts

In this tutorial you will learn to use Allclean and Allrun scripts on OpenFOAM. These scripts come by default in several OpenFOAM folders.

## OpenFOAM | First Tutorial – pitzDaily

In the previous tutorial we installed OpenFOAM on Windows, in this video you will simulate the first tutorial called pitzDaily.

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