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Article Archive

Technical analysis, field reports, and engineering insights from the FluidsMech Engineering team — covering flow measurement, CFD, pipeline integrity, and hydraulic systems.

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Flow Measurement & Instrumentation
FLOW MEASUREMENT

Multiphase flow metering in deepwater production: the error budget nobody audits

Gas void fraction uncertainty cascades through every layer of a MPFM stack — how a 4% GVF error became a 12% allocation discrepancy at year-end.

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INSTRUMENTATION

Pitot tube array design limits: when velocity profiles make your reading wrong

Installation-effect testing on nine Annubar configurations in a 48-inch line — the correction factors vendors don't publish.

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FLOW MEASUREMENT

Wet gas metering technologies compared: three years of field performance data

Coriolis, Venturi, and dual-energy gamma metering side by side on the same wellhead — which performs best in each GVF band.

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CFD & Numerical Simulation
CFD ANALYSIS

CFD vs physical testing in confined geometries: where the models still fail

Blind validation of six CFD solvers against LDV measurements in a T-junction with strong recirculation — the failure modes that appear in every solver.

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CFD ANALYSIS

Pressure drop optimisation in compact heat exchanger manifolds

Topology optimisation of a shell-side inlet manifold — how we reduced flow maldistribution from 31% to 4% without touching the tube bundle.

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CFD ANALYSIS

Density-stratified flow in large-diameter trunk lines: CFD validation study

Two-phase stratified flow at low velocities in a 48-inch crude trunk line — VOF simulations benchmarked against gamma densitometer traverses.

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Pipeline Engineering
PIPELINE ENGINEERING

Turbulent flow transition in corroded pipelines: when Reynolds numbers mislead

Internal corrosion shifts surface roughness in ways that push transition Reynolds numbers 40–60% below textbook predictions — 18 months of pigging data.

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PIPELINE ENGINEERING

Hydraulic transient analysis for pump trip scenarios: what the models miss

MOC vs CFD for a pump-trip transient in a 12-km pipeline — the check valve slam the 1D model predicted for entirely the wrong reason.

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PIPELINE ENGINEERING

Non-Newtonian slurry hydraulics in mineral processing: where Darcy-Weisbach fails

Kaolin tailings at 55% w/w solids — why the Bingham plastic model still over-predicts pressure drop by 18% despite careful calibration.

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Hydraulic Systems & Structural Integrity
HYDRAULIC SYSTEMS

Water hammer mitigation after a 280-bar surge incident: lessons from the field

A pressure surge event that destroyed two check valves and deformed a 14-inch header — root cause and the surge suppressor specification that followed.

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STRUCTURAL INTEGRITY

Vortex-induced vibration in small-bore instrument lines: a failure mode in plain sight

Fourteen fatigue cracks in instrument root valves at a single refinery — the modal analysis that should have caught them at design stage.

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ROTATING EQUIPMENT

Cavitation damage mapping in centrifugal pumps: a ten-year MTBF dataset

Twelve years of impeller inspection records across 34 offshore pump sets — which suction conditions predict early failure, and which don't.

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