Rapid increase in strength of vortices and a directional net flow due to Marangoni force in Büttiker–Landauer ratchet

The control of the vortex flow is interesting because it may open a new way to use low-grade energy. In this study, we report a rapid increase in the strength of vortices and a directional net flow at the classical threshold Rayleigh number in the Büttiker–Landauer (BL) ratchet. In particular, by in...

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Bibliographic Details
Published inPhysics of fluids (1994) Vol. 34; no. 6
Main Authors Sugioka, Hideyuki, Someya, Yusuke
Format Journal Article
LanguageEnglish
Published Melville American Institute of Physics 01.06.2022
Subjects
Chambers
Fluid dynamics
Fluid flow
Physics
Rayleigh number
Vortices
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Summary:The control of the vortex flow is interesting because it may open a new way to use low-grade energy. In this study, we report a rapid increase in the strength of vortices and a directional net flow at the classical threshold Rayleigh number in the Büttiker–Landauer (BL) ratchet. In particular, by increasing the temperature difference of the BL ratchet made by connecting plural liquid chambers with flow channels that generate Marangoni force, we succeed in observing this transition. Furthermore, we show that our simple transition model that considers a critical Rayleigh number explains the experimental results qualitatively. In addition, as a result, we succeed in producing a net flow without using the additional guide-walls that prevent the isolation of the vortex flows among the plural liquid chambers.
ISSN:1070-6631
1089-7666
DOI:10.1063/5.0093113