Self-propelling rotator driven by soluto-capillary marangoni flows

Frenkel, Mark; Whyman, Gene; Shulzinger, Evgeny; Starostin, Anton; Bormashenko, Edward

doi:10.1063/1.4979590

Cited by 21 publications

(14 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In our previous publication, 24 we suggested the following scaling law for the quasi-stationary frequency of rotation of the rotatorwhere Δγ is the jump in the surface tension of water due to absorption of camphor and η is the water viscosity. It is seen from Figure 5 that the scaling dependence qualitatively holds for the two-pole rotors; namely, the quasi-stationary frequency of rotation decreases with the length of the rotor.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Mini-Generator of Electrical Power Exploiting the Marangoni Flow Inspired Self-Propulsion

et al. 2019

Self Cite

View full text Add to dashboard Cite

The mini-generator of electrical energy exploiting Marangoni soluto-capillary flows is reported. The interfacial flows are created by molecules of camphor emitted by the “camphor engines” placed on floating polymer rotors bearing permanent magnets. Camphor molecules adsorbed by the water/vapor interface decrease its surface tension and create the stresses resulting in the rotation of the system. The alternative magnetic flux in turn creates the current in the stationary coil. The long-lasting nature of rotation (approximately 10–20 h) should be emphasized. The brake-specific fuel consumption of the reported generator is better than that reported for the best reported electrical generators. Various engineering implementations of the mini-generator are reported.

show abstract

Section: Resultsmentioning

confidence: 99%

“…We demonstrate the possibility of manufacture of the electrical energy with the self-propelled rotator driven with Marangoni solute-capillary flows. 24,25…”

Section: Introductionmentioning

confidence: 99%

Mini-Generator of Electrical Power Exploiting the Marangoni Flow Inspired Self-Propulsion

et al. 2019

Self Cite

View full text Add to dashboard Cite

show abstract

“…It seems reasonable to assume that spiral thermal surface waves reflect the quasi-periodic distribution of camphor at the water/vapor interface [31]. The reported effect is important for understanding of the self-propulsion of floating bodies, exploited recently for micro-robotics and micro-fluidics applications and also for the ecologically friendly generation of electrical energy [16][17][18]38,39].…”

Section: Discussionmentioning

confidence: 97%

Spiral Thermal Waves Generated by Self-Propelled Camphor Boats

et al. 2020

Self Cite

View full text Add to dashboard Cite

Spiral thermal surface waves arising from self-propulsion of the camphor-driven objects are reported. Spiral thermal waves were registered for dissolution and evaporation-guided self-propulsion. Soluto-capillarity is accompanied by thermo-capillarity under self-propulsion of camphor boats. The jump in the surface tension due to the soluto-capillarity is much larger than that due to the thermo-capillarity. The spiral patterns inherent for the surface thermal waves are imposed by the self-rotational motion of camphor grains. The observed thermal effect is related to the adsorption of camphor molecules at the water/vapor interface. The observed spirals are shaped as Archimedean ones.

show abstract

“…[5][6][7][8][9] Additionally, a surface tension gradient-induced Marangoni ow can lead to powerful propulsion of small objects. [10][11][12] In a similar manner, soap boats, 13 camphor crystals, 14 organic solvent-loaded objects 15,16 and depolymerizable plastics 17 can move on a planar water surface due to Marangoni propulsion: the dissolution of chemicals, which decrease surface tension of water, creates a surface tension gradient at the air-water interface, which induces motion. Recently, light-induced Marangoni ow has been proven to work as a powerful propulsion force to move small objects.…”

Section: Introductionmentioning

confidence: 99%