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Draft. This manual is new and still being checked against the software as it is verified. Some pages will change. If something here does not match what you see, the software is right — tell us and we will fix the page.

Initial conditions

The Initial conditions panel open beside the setup tree, showing the Method, Values, Turbulence and Written to 0/ sections.

Where it is

Section titled “Where it is”

Setup tree: Initial conditions

Controls

Section titled “Controls”

Method

Section titled “Method”

Initialise

Section titled “Initialise”
  • Control: choice (ComboRow)
  • Default: Uniform
  • Bound to: CaseState.initMethod
  • Options: Uniform, Potential flow, From an existing run
  • Writes: potentialFoam (U only), potentialFoam -writephi, 0/* internalField
  • Shown when: root.wholePage

Source case

Section titled “Source case”
  • Control: value (ValueField)
  • Default: empty
  • Bound to: CaseState.initMapSource
  • Value modes: none (plain entry)
  • Shown when: root.wholePage && CaseState.initMethod === "From an existing run"

The case directory to map from. Its latest time is used.

Use this case’s own run

Section titled “Use this case’s own run”
  • Control: action (ToolButton2)
  • Enabled when: CaseState.runDirectory !== ""

Track the inlet

Section titled “Track the inlet”
  • Control: on/off (ToggleRow)
  • Default: true
  • Bound to: CaseState.initFromInlet
  • Shown when: root.wholePage

Seed the domain with the inlet’s velocity and turbulence, so changing the inlet keeps the initial field consistent.

Values

Section titled “Values”

Velocity

Section titled “Velocity”
  • Control: value (ValueField)
  • Unit: m/s
  • Bound to: CaseState.effectiveInitVelocity
  • Writes: 0/U internalField
  • Shown when: root.showsField("U")

Pressure

Section titled “Pressure”
  • Control: value (ValueField)
  • Unit: Pa
  • Default: 0
  • Bound to: CaseState.initPressure
  • Writes: 0/p … m²/s² (kinematic)
  • Shown when: root.wholePage || root.fieldFilter === "p" || root.fieldFilter === "p_rgh"

Temperature

Section titled “Temperature”
  • Control: value (ValueField)
  • Unit: K
  • Default: 293.15
  • Bound to: CaseState.initTemperature
  • Writes: 0/T internalField
  • Shown when: CaseState.energyEnabled && root.showsField("T")

Turbulence

Section titled “Turbulence”

Intensity

Section titled “Intensity”
  • Control: value (ValueField)
  • Unit: %
  • Bound to: CaseState.effectiveInitIntensity
  • Shown when: CaseState.turbulenceFields.length > 1 && root.turbulencePage

Length scale

Section titled “Length scale”
  • Control: value (ValueField)
  • Unit: m
  • Bound to: CaseState.effectiveInitLengthScale
  • Shown when: CaseState.turbulenceFields.length > 1 && root.turbulencePage

Written to 0/

Section titled “Written to 0/”

+ Add subdomain

Section titled “+ Add subdomain”

Label changes with the case; the source gives these forms: + Add subdomain, + Add subdomain of ….

  • Control: action (ToolButton2)

Conditional and repeated groups

Section titled “Conditional and repeated groups”

Per item in CaseState.initRegions

Section titled “Per item in CaseState.initRegions”

repeated once for every entry in CaseState.initRegions

Shape

Section titled “Shape”
  • Control: choice (ComboRow)
  • Default: box
  • Options: box, sphere
  • Writes: setFieldsDict/regions
  • Shown when: !regionCard.usesPrimitive

Field

Section titled “Field”
  • Control: choice (ComboRow)

Which field setFields writes here. Changing it moves this subdomain under that field in the tree.

Value

Section titled “Value”
  • Control: value (ValueField)
  • Default: 1
  • Value modes: none (plain entry)

A bare number for a scalar, or (x y z) for a vector — which keyword setFields needs depends on it.

Min X

Section titled “Min X”
  • Control: value (ValueField)
  • Unit: m
  • Value modes: none (plain entry)
  • Shown when: regionCard.usesPrimitive

Min Y

Section titled “Min Y”
  • Control: value (ValueField)
  • Unit: m
  • Value modes: none (plain entry)
  • Shown when: regionCard.usesPrimitive

Min Z

Section titled “Min Z”
  • Control: value (ValueField)
  • Unit: m
  • Value modes: none (plain entry)
  • Shown when: regionCard.usesPrimitive

Max X

Section titled “Max X”
  • Control: value (ValueField)
  • Unit: m
  • Value modes: none (plain entry)
  • Shown when: regionCard.usesPrimitive

Max Y

Section titled “Max Y”
  • Control: value (ValueField)
  • Unit: m
  • Value modes: none (plain entry)
  • Shown when: regionCard.usesPrimitive

Max Z

Section titled “Max Z”
  • Control: value (ValueField)
  • Unit: m
  • Value modes: none (plain entry)
  • Shown when: regionCard.usesPrimitive

Centre X

Section titled “Centre X”
  • Control: value (ValueField)
  • Unit: m
  • Value modes: none (plain entry)
  • Shown when: regionCard.usesPrimitive

Centre Y

Section titled “Centre Y”
  • Control: value (ValueField)
  • Unit: m
  • Value modes: none (plain entry)
  • Shown when: regionCard.usesPrimitive

Centre Z

Section titled “Centre Z”
  • Control: value (ValueField)
  • Unit: m
  • Value modes: none (plain entry)
  • Shown when: regionCard.usesPrimitive

Radius

Section titled “Radius”
  • Control: value (ValueField)
  • Unit: m
  • Value modes: none (plain entry)
  • Shown when: regionCard.usesPrimitive

Problems reported against this step

Section titled “Problems reported against this step”

The application reports no problems against this step.

… marks a value the application computes at run time, so the source carries no fixed text for it.