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Results

Output configuration in Marlim3 is organized around four concepts:

  • Line profiles versus measured length at selected times.
  • Time trends at selected measured-length points.
  • Cross-section radial profiles.
  • Cross-section radial trends.

Output Objects

Top-level output objects are:

  • productionProfile (EN) · perfilProducao (PT)
  • serviceProfile (EN) · perfilServico (PT)
  • productionTrend (EN) · tendP (PT)
  • serviceTrend (EN) · tendS (PT)
  • crossProductionProfile (EN) · perfisTransP (PT)
  • crossServiceProfile (EN) · perfisTransS (PT)
  • crossProductionTrend (EN) · tendTransP (PT)
  • crossServiceTrend (EN) · tendTransS (PT)

Profiles (Production/Service)

Profiles are objects with:

  • active · ativo
  • time · tempo (array of output instants)
  • Boolean variable flags

For transient simulations, each listed time triggers one linewise profile write.

Common production-variable flags:

Concept EN key PT key
Pressure pressure pressao
Temperature temperature temperatura
Holdup holdup holdup
Complementary fraction complementaryFluidFraction bet
Gas superficial velocity usg ugs
Liquid superficial velocity usl uls
Gas velocity ug ug
Liquid velocity ul ul
Flow pattern id flowPattern arra
Friction gradient frictionPressureGradient fric
Hydrostatic gradient hydrostaticPressureGradient hidro
Gas in-situ density gasInSituDensity rhog
Liquid in-situ density liquidInSituDensity rhol

There are many advanced flags in schema for diagnostics and specialized workflows (eigenvalues, pseudocomponent outputs, wax/hydrate diagnostics, etc.).

Unlike profiles, trends are arrays of point objects, not a single object.

Each item typically contains:

  • active · ativo
  • measuredLength · comprimentoMedido
  • dt · dt
  • label · rotulo
  • Variable flags

One item defines one output point along the line.

Important parser behavior:

  • In transient mode, dt must be positive for active trend items.
  • Position is mapped to internal cell index and validated against mesh bounds.

Cross-Section Outputs

Cross Profiles

  • crossProductionProfile / crossServiceProfile are objects.
  • They use time arrays and measuredLength arrays to request radial snapshots.
  • crossProductionTrend / crossServiceTrend are arrays of items.
  • Each item uses:
  • measuredLength · comprimentoMedido
  • layerIndex · camada
  • discretization · discretizacao
  • dt · dt
  • label · rotulo

This is the right mechanism to monitor wall-layer temperatures versus time at specific radial locations.

Configuration Patterns

Minimal Profile Setup

{
  "productionProfile": {
    "active": true,
    "time": [0, 1800, 3600],
    "pressure": true,
    "temperature": true,
    "holdup": true,
    "flowPattern": true,
    "frictionPressureGradient": true
  }
}

Production Trend at Two Gauges

{
  "productionTrend": [
    {
      "active": true,
      "measuredLength": 50.0,
      "dt": 5.0,
      "label": "near-inlet",
      "pressure": true,
      "temperature": true,
      "holdup": true
    },
    {
      "active": true,
      "measuredLength": 2500.0,
      "dt": 5.0,
      "label": "deep-gauge",
      "pressure": true,
      "temperature": true,
      "holdup": true
    }
  ]
}

Cross-Section Trend Example

{
  "crossProductionTrend": [
    {
      "active": true,
      "measuredLength": 2500.0,
      "layerIndex": 2,
      "discretization": 1,
      "dt": 10.0,
      "label": "insulation-mid"
    }
  ]
}

Interpretation Checklist

  1. Compare transient runs against a validated steady-state baseline.
  2. Verify output positions against accessory and boundary locations.
  3. Use short dt in fast-event windows and relaxed dt after transients settle.
  4. Prefer focused variable sets; enable advanced diagnostics only when needed.