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task library
built templatemesh-independencewith-tool

Gci Calculation

Calculates observed order of accuracy, Richardson extrapolated value, and fine-grid convergence index for a monotonic three-grid study with equal refinement ratio. The template uses a fixed safety factor of 1.25 and requires the three QoI values to show monotonic convergence.

inputs

4 fields

context

2 archetypes

engine

with-tool

outputs

5 scored fields

contract fields

Parameter Map

4 inputs to 5 scored outputs

  • coarse_grid_value

    float

    Quantity of interest on the coarse grid

    -1000000 to 1000000

  • medium_grid_value

    float

    Quantity of interest on the medium grid

    -1000000 to 1000000

  • fine_grid_value

    float

    Quantity of interest on the fine grid

    -1000000 to 1000000

  • refinement_ratio

    float

    Grid refinement ratio between successive grids

    1.01 to 4
observed_ordertol 0.03

Observed order of accuracy

extrapolated_valuetol 0.03

Richardson extrapolated fine-grid value

approximate_relative_error_pcttol 0.03

Approximate relative error between fine and medium grids

gci_fine_pcttol 0.03

Fine-grid convergence index

asymptotic_range_ratiotol 0.03

Asymptotic range ratio

visibility contract

Difficulty Ladder

all_giveneasy

All parameters given for a drag coefficient convergence study

all fields visible
all_givenmedium

All parameters given across convergence study types

all fields visible
all_givenhard

All parameters given for a pressure-drop convergence study

all fields visible

scenario bands

Archetype Atlas

drag_coefficient

2 contexts

Monotonic drag coefficient mesh convergence study

coarse_grid_value0.65 to 0.85
medium_grid_value0.43 to 0.48
fine_grid_value0.34 to 0.38
refinement_ratio1.5 to 2

cfd-drag-study / external-flow-model

pressure_drop

2 contexts

Monotonic pressure-drop mesh convergence study

coarse_grid_value380 to 520
medium_grid_value220 to 260
fine_grid_value170 to 200
refinement_ratio1.5 to 2

duct-cfd-model / pipe-loss-cfd-study

rendered task

Generation Preview

duct-cfd-model-pressure-drop-preview

difficulty
hard
visibility
all_given
archetype
pressure_drop
site context
duct-cfd-model
instruction excerptgci-calculation_calc.py

visible fields

  • coarse_grid_value380 to 520
  • medium_grid_value220 to 260
  • fine_grid_value170 to 200
  • refinement_ratio1.5 to 2

withheld schema

observed_orderextrapolated_valueapproximate_relative_error_pctgci_fine_pctasymptotic_range_ratio
Monotonic pressure-drop mesh convergence study. duct-cfd-model. Required outputs: observed_order, extrapolated_value, approximate_relative_error_pct, gci_fine_pct, asymptotic_range_ratio