Ground based experiments about stability of deformable liquid bridges

Statistics – Applications

Scientific paper

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Forced Convection, Standing Waves, Resonance, Thermometers

Scientific paper

In this study the primary goal is to investigate the loss of stability of the steady convection in deformable liquid bridges under different surrounding thermal conditions (Pt=105). For the first time, it is experimentally obtained that the two branches of the function critical Marangoni numbers versus variation of the volume, correspond to different azimuthal wave numbers. The branch on which ΔTcr grows with increasing volume belongs to m=1, and the descending branch belongs to the azimuthal wave number m=2. The influence of the mean temperature inside liquid bridge (temperature of the cold rod) on the onset of instability is experimentally considered. These experiments can display the role of temperature dependent viscosity and of the thermal conditions around the liquid bridge. .

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