Rheometry Data for Mount Meager Volcanic Ash at Controlled Gas Fluxes

Mount Meager, British Columbia, Canada, is the source of ash used in rheology experiments. The dataset contains shear rate sweep measurements for monodisperse ash grain sizes of 500 µm, 250 µm, 125 µm, and 63 µm, tested across a range of volumetric gas flow rates. Data were generated using an Anton Paar MCR302 rotational rheometer with a powder flow cell, funded by NERC Grant NE/W003767/1.

Use Cases

• Modeling the rheological behavior of pyroclast-gas mixtures based on shear rate sweeps.
• Analyzing the influence of grain size on powder flowability under different gas fluxes.
• Calibrating computational fluid dynamics models for volcanic hazards using experimental rheology data.
• Studying particle slip prevention in rheometry based on the described profiled measuring geometry.

Strengths

• Experimental conditions are precisely documented, including specific gas flow rates for each grain size (e.g., 0-70 L min-1 for 500 µm ash).
• Measurement methodology is detailed, specifying the Anton Paar MCR302 rheometer and a 24.16 mm profiled geometry to prevent particle slip.
• Data covers a systematic range of shear rates from 0.1 s⁻¹ to 328 s⁻¹, with approximately 20 data points per decade.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment for large-scale modeling.
• Description metadata is limited; actual data quality requires manual inspection after download.

Provenance

Source

British Geological Survey (BGS)

Collection Method

Laboratory rheometry using an Anton Paar MCR302 rotational rheometer with a powder flow cell.

Freshness

Last updated 2026-05-28 14:05:31.891861; freshness should be verified.

Geography

Mount Meager, British Columbia, Canada