Frictional Interactions on Ice Surfaces

Ice friction arises from the interplay of mechanical, thermal and hydrodynamic processes at the interface between a sliding object and the ice lattice. Under typical conditions, frictional heat generates a nanometre-scale meltwater film that lubricates motion, while mechanical indentations or ploughing of the slider into the ice contribute a resistive force. The microscopic properties of the sliding object and the ice surface—its crystalline structure, hardness and roughness—set the balance between lubrication, adhesion and deformation. Temperature, load and sliding speed govern whether the dominant mechanism is boundary lubrication by the meltwater film, viscoelastic dissipation in the slider or plastic flow and fracturing of ice asperities. Surface texturing, whether engineered for sports equipment or arising from environmental wear, can amplify or suppress these effects. Understanding this spectrum of frictional interactions is vital for applications ranging from winter sports and transportation safety to geophysical phenomena such as glacier sliding and sea-ice dynamics. Insights into molecular-scale water structure, macroscopic roughness and thermal regimes continue to refine predictive models for the slipperiness and resistance of ice.

Research from Nature Portfolio

Recent experimental investigations into the physics of curling stones have deepened our understanding of frictional interactions on pebbled ice. Precision interferometric measurements of cross-scratches reveal that transverse forces between stone and ice scale with the angular orientation of microgrooves, validating a scratch-guiding mechanism for lateral displacement. Complementary studies have shown that the curl distance of a granite stone is governed primarily by the surface roughness and effective contact area of its running band. By systematically varying band topography and pebbled ice characteristics, researchers demonstrated that controlled adjustments of roughness can tune lateral frictional forces, offering a route to standardise performance across curling venues.

Research from all publishers

Advances in the theory of ice-skate interactions have quantified the dual contributions of ploughing deformation and lubricating meltwater. A refined analytical framework, corroborated by laboratory sliding tests, shows that mechanical indentation and fluid shear within the melt layer contribute comparably to the net friction force, with their relative importance depending on skate geometry, speed and ice temperature. Sphere-on-ice experiments have further clarified how friction follows an Arrhenius-type temperature dependence at low temperatures, shifting to a regime dominated by pressure-induced hardness and plastic ploughing near the melting point. In parallel, studies of ski–snow friction in Nordic sports have elucidated how compaction, adhesion and water bridging combine to produce resistive forces. Control of ski base topography and wax formulations, in tandem with knowledge of snow grain size and ambient humidity, enables minimisation of friction to enhance glide performance.

Frictional Interactions on Ice Surfaces publication trend

The graph below shows the total number of articles in frictional interactions on ice surfaces across all publications each year (not limited to Nature Index journals).

Technical terms

Meltwater film: a thin liquid layer at the ice–slider interface generated by frictional heating, acting as a lubricant.

Ploughing deformation: mechanical indentation of the ice surface by a sliding object, contributing to friction.

Pebbled ice: patterned ice surface covered with small, regularly spaced protrusions, as used in curling.

Running band: narrow, circular contact region on a curling stone’s underside that interacts with the ice surface.

Viscoelasticity: material property exhibiting both viscous flow and elastic response under stress.

Thermal activation: temperature-dependent process in which molecular motion overcomes energy barriers, typically following an Arrhenius relationship.

References

1. How ploughing and frictional melting regulate ice-skating friction. Friction (2023).
2. Nanorheology of Interfacial Water during Ice Gliding. Physical Review X (2019).
3. Friction on Ice: How Temperature, Pressure, and Speed Control the Slipperiness of Ice. Physical Review X (2021).
4. A surface topography analysis of the curling stone curl mechanism. Scientific Reports (2018).
5. The importance of the surface roughness and running band area on the bottom of a stone for the curling phenomenon. Scientific Reports (2020).
6. A Scientific Perspective on Reducing Ski-Snow Friction to Improve Performance in Olympic Cross-Country Skiing, the Biathlon and Nordic Combined. Frontiers in Sports and Active Living (2022).