# Fluid Material Properties

The Fluid material type is a parameter used with the BEGIN MATERIAL data block.

## Syntax

Fluid Air | { | |

FluidType = | "Newtonian" | |

Density = | r | |

SpecificHeat = | Cp(T) | |

Conductivity = | K(T) | |

Viscosity = | m (T) | ho | |

CoeffOfThermalExpansion = | β | |

VolumetricHeatSource = | Qvol } |

## Comments

FluidType denotes the type of fluid and it is "Newtonian". Note that the non-Newtonian materials are classified as Polymer for Polymer Processing and Workpiece for Metal Extrusion. The specific heat, thermal conductivity, and viscosity can be input as functions of temperature.

## Fluid Material Properties Data Types

The following table contains descriptions of data types for fluid material
properties:

Variable Name | Value Type | Remarks |
---|---|---|

FluidType | String in quotes | "Newtonian" = Newtonian; |

Desnity | Real (Constant) | Density of the fluid |

SpecificHeat | Real (Constant/Function of Temp.) | Function can be a TABLE1 or EXPRESSION |

Conductivity | Real (Constant/Function of Temp.) | Function can be a TABLE1 or EXPRESSION |

Viscoscity | Real (Constant/Function of Temp.) | TABLE1 or EXPRESSION are used only for Newtonian fluid. For non-Newtonian fluids the viscosity is computed using the model specific expressions. |

CoeffOfThermalExpansion | Real (Constant) | Thermal Expansion coeff. |

VolumetricHeatSource | Real (Constant) | Value per unit volume. |