We studied, experimentally, the pattern dynamics and free surface deformation in Bénard–Marangoni convection, in a circular container (aspect ratio = 6). The free surface deformation fields were visualized by interferometry and temperature fields by infrared thermography. We considered the influence of the Marangoni (up to 2,623), Biot and Prandtl numbers. More dynamics are induced by increasing the Biot number and transition to a time-dependent flow has been observed. Conversely, increasing the Prandtl number reduces the dynamics. The deformation increases as a function of the Marangoni number until it reaches asymptotic values, which are functions of the Biot and Prandtl numbers.
Experiments in Fluids – Springer Journals
Published: Aug 24, 2007
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