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Volume 5
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10.3390/condmat5030051
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Article

Spiral Thermal Waves Generated by Self-Propelled Camphor Boats

by
Alla Vilk
,
Irina Legchenkova
,
Mark Frenkel
and
Edward Bormashenko
*
Engineering Faculty, Chemical Engineering Department, Ariel University, P.O. Box 3, Ariel 407000, Israel
*
Author to whom correspondence should be addressed.
Condens. Matter 2020, 5(3), 51; https://doi.org/10.3390/condmat5030051
Submission received: 6 July 2020 / Revised: 22 July 2020 / Accepted: 5 August 2020 / Published: 6 August 2020
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Abstract

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.
Keywords: self-propulsion; camphor grain; thermal waves; soluto-capillarity; thermo-capillarity self-propulsion; camphor grain; thermal waves; soluto-capillarity; thermo-capillarity

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MDPI and ACS Style

Vilk, A.; Legchenkova, I.; Frenkel, M.; Bormashenko, E. Spiral Thermal Waves Generated by Self-Propelled Camphor Boats. Condens. Matter 2020, 5, 51. https://doi.org/10.3390/condmat5030051

AMA Style

Vilk A, Legchenkova I, Frenkel M, Bormashenko E. Spiral Thermal Waves Generated by Self-Propelled Camphor Boats. Condensed Matter. 2020; 5(3):51. https://doi.org/10.3390/condmat5030051

Chicago/Turabian Style

Vilk, Alla, Irina Legchenkova, Mark Frenkel, and Edward Bormashenko. 2020. "Spiral Thermal Waves Generated by Self-Propelled Camphor Boats" Condensed Matter 5, no. 3: 51. https://doi.org/10.3390/condmat5030051

APA Style

Vilk, A., Legchenkova, I., Frenkel, M., & Bormashenko, E. (2020). Spiral Thermal Waves Generated by Self-Propelled Camphor Boats. Condensed Matter, 5(3), 51. https://doi.org/10.3390/condmat5030051

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