pt distribute trans particles

Type

Logical

Default Value

t

Description

Uniformly distribute transient particles over the time step in a transient run. If this parameter is set to 'f', all particles are injected at the start of the time step.

pt extrap vel for integ

Type

Logical

Default Value

f

Description

Use extrapolation of the particle velocity during particle integration. This may be helpful for cases with streamline curvature.

pt fluid var interpolation option

Type

Integer

Default Value

1 (for cases that involve particle reactions)

2 (for cases that do not involve particle reactions)

Description

This parameter controls whether fluid variables are interpolated to the current particle position.

Values:

0 = No interpolation. All fluid variables are assumed to be constant within a control volume.

1 = Interpolate all fluid variables except those that represent species concentrations.

2 = Interpolate all fluid variables.

pt force export massflow

Type

Logical

Default Value

f

Description

When this parameter is set to 't', particle mass flows are always written to the results files. Otherwise they will only be written if they are used in CEL expressions or monitors.

pt linear src coef multiplier

Type

Real

Default Value

1.0

Description

Defines a factor which multiplies the linearization coefficient of the particle sources.

pt maximum particle temperature

Type

Real

Default Value

3000.0

Description

Defines upper bound for the particle temperature in units of Kelvin [K].

pt minimum diameter

Type

Real

Default Value

1.E-8

Description

Defines the minimum allowed particle diameter. Tracking of a particles is stopped if its diameter falls below this value.

pt minimum eddy life time

Type

Real

Default Value

0.0

Description

Defines the minimum eddy life time for turbulent dispersion of particles.

pt time interpolation

Type

Integer

Default Value

1

Description

Used in a transient run in order to decide how fluid quantities have to be interpolated to the current particle time. Possible values are:

0 = Use newest time level

1 = Linear interpolation between current and previous time levels

2 = Quadratic interpolation between current and two previous time levels

pt tracks in absolute frame

Type

Logical

Default Value

f

Description

Output tracks in absolute frame of reference. Important for postprocessing of non-transient RFR cases. Not required for transient cases.

pt zone specific tracks

Type

Logical

Default Value

t

Description

This parameter controls how particle tracking information is written to the results file. By default, this expert parameter is set to 't' and particle tracks will contain domain information. This information enables CFD-Post, for example, to display particle tracks on a user specified domain only.

In a multi-configuration run, where the number of domains may vary across simulations, it can happen that the interpolator can no longer map the source domain to a target domain. In this case, the source particle tracks are not copied to the target domain and are therefore lost. To avoid this problem, it is suggested that you set the pt zone specific tracks parameter to 'f' for multi-configuration runs. This enables the interpolator to always copy particle tracks to the target file, regardless of any changes in the number of source to target domains.

solve particles

Type

Logical

Default Value

t

Description

Flag for controlling whether or not the controller solves the particle transport equations