# GAS_KINETIC_MODEL

Specifies a gas kinetic model for the advective_diffusive multifield type.

## Type

AcuSolve Command

## Syntax

GAS_KINETIC_MODEL("name") {parameters...}

## Qualifier

User-given name.

## Parameters

- geometrical_configuration_index (integer) >=0 <=2 [=1]
- An integer value indicating the type of molecular configuration. If the value is 0, the molecule is a single atom. If it is 1 the molecule is linear. Finally, if it is 2, the molecule is nonlinear.
- Lennard_Jones_potential_well_depth (real) [=97.530]
- The Lennard-Jones potential well depth of the gas in Kelvin.
- Lennard_Jones_collision_diameter (real) [=3.621]
- The Lennard-Jones collision diameter of the gas in Angstroms.
- dipole_moment (real) [=0.0]
- The dipole moment of the gas in Debye.
- Polarizability (real) [=1.760]
- The polarizability in cubic Angstroms.
- rotational_relaxation_collision_number (real) [=4.0]
- The rotational relaxation collision number at 298 Kelvin.
- molecular_weight (real) [=0.028013]
- Molecular weight of the gas.

## Description

```
GAS_KINETIC_MODEL( "N2" ) {
geometrical_configuration_index = 1
molecular_weight = 0.028013
Lennard_Jones_potential_well_depth = 97.530
Lennard_Jones_collision_diameter = 3.621
dipole_moment = 0.0
polarizability = 1.760
rotational_relaxation_collision_number = 4.000
}
VISCOSITY_MODEL( "N2" ) {
type = gas_kinetic
}
CONDUCTIVITY_MODEL( "N2" ) {
type = gas_kinetic
turbulent_prandtl_number = 0.91
}
```

```
DIFFUSIVITY_MODEL( "N2" ) {
type = gas_kinetic
}
```

```
FIELD_INTERACTION_MODEL( "Mixture" ) {
type = advective_diffusive
diffusion_matrix_type = gas_kinetic
}
```