Power-law decaying oscillations of neutrally buoyant spheres in continuously stratified fluid

István Biró, K. Gábor Szabó, Balázs Gyüre, Imre M. Jánosi, Tamás Tél

Research output: Article

3 Citations (Scopus)


The free sinking motion of small spheres is experimentally investigated in a laboratory tank filled up with continuously stratified salt solutions. Special attention is paid to the late stage oscillations around the gravitational equilibrium level. Such motion is generated by slowly decaying weak internal waves originating from the interaction of the solid sphere with the surrounding fluid. The temporal decay of oscillation amplitudes and velocities can be best described by a power law of exponent value close to -3/2. Up to our best knowledge, none of the existing theories can predict a similar algebraic decay.

Original languageEnglish
Article number051705
JournalPhysics of Fluids
Issue number5
Publication statusPublished - máj. 2008


ASJC Scopus subject areas

  • Computational Mechanics
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

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