Illustrate pipeline startup after pigging: transient MEG/water film drying

README.md

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 * [Hydrocarbon phase evolution: NeqSim PVT to OPM Flow](notebooks/reservoir/hydrocarbon_phase_evolution_neqsim_opm.ipynb) — Companion to equinor/neqsim#4198: saturation-pressure temperature sensitivity, CME/CVD laboratory paths, an executed 300-cell black-oil reservoir, and a NeqSim surface process. Synthetic inputs; explicit limits on migration and compositional interpretation.
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+### Pipeline startup after pigging
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+The [MEG/water residual-film drying notebook](notebooks/flowassurance/pipeline_startup_after_pigging_meg_water.ipynb) follows a 99/1 wt% MEG/water film in a 10 km pipeline at 5 °C with gas specified by a −18 °C water dew point at 70 bara. Editable geometry, film thickness and gas flow connect NeqSim CPA equilibrium to a conservative time-dependent film/gas model. Stored outputs include water absorption, slow MEG removal, outlet water dew point, spatial profiles, gas consumption, and refinement/sensitivity checks. Practical completion uses an explicit residual threshold; the duration is an illustrative prediction rather than an experimentally qualified field dry-out time.

notebooks/examples_of_NeqSim_in_Colab.ipynb

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     "\n",
     "## Flow assurance\n",
     "\n",
+    "* **Advanced** - [Pipeline startup after pigging: MEG/water film drying](flowassurance/pipeline_startup_after_pigging_meg_water.ipynb): 10 km residual-film startup with current-master CPA equilibrium, reversible water/MEG transfer, finite gas holdup, outlet dew point, axial drying profiles, conservation and numerical/input sensitivity.\n",
     "* [Methanol, MEG and AA-LDHI hydrate management choices](flowassurance/hydrate_mitigation_chemical_choice_4016.ipynb): source-pinned three-phase CPA hydrate curves, flowline margins, synthetic-water scale pH screens and the separate AA-LDHI qualification boundary.\n",
     "* **Advanced** - [Hot-oil commissioning of subsea jumpers with NeqSim and machine learning](flowassurance/hot_oil_commissioning_neqsim_ml.ipynb): follow hot oil displacing cold diesel; calculate properties, wax, wall heat storage, risk and pressure; check conservation and discretization; compare RF/MLP surrogates and explicit restart scenarios.\n",
     "* [CO₂ hydrate calculations with NeqSim: brines, inhibitors and drilling-fluid examples](flowassurance/co2_hydrate_brines_and_drilling_fluids.ipynb): updated CO₂/brine solver with a 10 wt% KCl regression at 11.3 bara, pressure/inventory phase checks and hydt unit comparison; hands-on setup, single-point calculations, parameter sweeps and result interpretation; executed brine/MEG/CO₂–CH₄ examples, Burgass NaCl plus 110 Dholabhai (1993) pure-water/single/mixed-salt endpoints, family error metrics and experimental discussion, practice tasks and a clearly synthetic laboratory-correlation workflow.\n",
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