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Article Dans Une Revue Physical Review E : Statistical, Nonlinear, and Soft Matter Physics Année : 2006

Piston-effect-induced thermal jets in near-critical fluids

Résumé

In very compressible fluids, such as fluids near their critical point, the bulk fluid is adiabatically thermalized by the expansion of a hot boundary layer. Thanks to this thermomechanical processthe so-called piston effectthe fluid velocity at the edge of the boundary layer can become very high when the heating power is concen-trated in a fissure. Spectacular jets are then observed in SF6and CO2. Data obtained under weightlessnessinorder to remove convectionand data obtained under earth gravity are compared and analyzed. They empha-size the key role of the boundary layer expansion for thermal phenomena in compressible fluids and thehydrodynamic nature of the piston effect
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Dates et versions

hal-00130895 , version 1 (01-07-2021)

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Thomas Fröhlich, Daniel Beysens, Yves Garrabos. Piston-effect-induced thermal jets in near-critical fluids. Physical Review E : Statistical, Nonlinear, and Soft Matter Physics, 2006, 74 (4), 046307 (6 p.). ⟨10.1103/PhysRevE.74.046307⟩. ⟨hal-00130895⟩
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