Surfactant Density and Surface Height Measurements on Gravity-Capillary Waves

Aggregating spatiotemporal measurements of an insoluble surfactant density field and surface height field driven by gravity-capillary waves in a shallow cylindrical container. The data was generated by Stephen L. Strickland through moiré imaging for height and fluorescence imaging of NBD-tagged phosphatidylcholine for surfactant density. It captures the superposition of standing Faraday waves and travelling meniscus waves, with analysis including fits using Bessel function superpositions.

Use Cases

• Analyze the phase relationship between the surfactant density field and the surface height field to understand wave coupling dynamics.
• Fit spatiotemporal variations in the surfactant density field using a Bessel function ansatz to extract wavenumbers and damping factors.
• Investigate the accumulation patterns of surfactant on the leading edge of travelling meniscus waves and in the troughs of standing Faraday waves.
• Compare the measured damping factors for height and surfactant in meniscus waves to explore contributions from longitudinal waves.

Strengths

• Data includes simultaneous measurement of two physical fields: surfactant density and surface height.
• Measurements are phase-averaged from stroboscopically acquired images, enhancing signal clarity.
• Analysis provides specific reported measurements including wavenumbers, energy damping factors, and phase shifts.

Limitations

• The dataset is derived from a specific laboratory setup (shallow cylindrical container), limiting direct environmental applicability.
• Sample size and data volume (rows, columns) are unspecified, which may constrain statistical analysis.
• Focus is on a single, insoluble surfactant (NBD-tagged phosphatidylcholine), not a broad range of surface-active materials.

Provenance

Source

Stephen L. Strickland via Dryad.

Collection Method

Experimental measurement using moiré imaging for surface height and fluorescence imaging for surfactant density.

Freshness

Last updated in June 2020.

Geography

Laboratory setting.