Summary
The instabilities in horizontal layers of viscoelastic fluids heated from below and cooled from above have been investigated by the present authors in earlier papers [1] applying holographic interferometry. It was shown that the critical Rayleigh number Rac characterizing the onset of laminar steady two-dimensional Rayleigh-Bénard convection can be increased in viscoelastic polymer solutions as compared to Newtonian fluids. Subject of this paper are the transitions to three dimensional or time dependent stability regions.
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References
Gampert, B.; J. Domjahn: Visualization of Ranges of Stability in Viscoelastic Rayleigh-Bénard Convection, Flow Visualization V, (ed. R. Reznicek, Hemisphere, Washington)
Krishnamurti, R.: On the transition to turbulent convection. Part 2, The transition to time-dependent flow. J. Fluid. Mech. 42, pp 309–320 (1970b)
Busse, F. H.: Transition to Turbulence in Rayleigh-Bénard convection in Hydrodynamic Instabilities and the Transition to Turbulence (eds. H. L. Swinney; J. P. Gollup, Springer Verlag Heidelberg Berlin New York)
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© 1992 Springer-Verlag Berlin Heidelberg
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Gampert, B., Domjahn, J. (1992). The Viscoelastic Rayleigh-Bénard Convection Investigated by Different Optical Methods. In: Tanida, Y., Miyashiro, H. (eds) Flow Visualization VI. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-84824-7_10
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DOI: https://doi.org/10.1007/978-3-642-84824-7_10
Publisher Name: Springer, Berlin, Heidelberg
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