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Area of Science:

  • Fluid dynamics
  • Particle dynamics
  • Heat transfer

Background:

  • Previous studies demonstrated solid particle attractors in thermovibrationally driven flows within cavities subjected to unidirectional temperature gradients.
  • The current research builds upon this by investigating more complex scenarios involving non-uniform temperature distributions.

Purpose of the Study:

  • To investigate the formation and characteristics of particle accumulation structures in thermovibrationally driven flows with spatially varying temperature gradients.
  • To explore the relationship between temperature field inhomogeneities and the multiplicity of particle attraction loci.
  • To identify new particle accumulation structures and their dependence on various physical parameters.

Main Methods:

  • Numerical or experimental simulation of thermovibrationally driven flows in cavities with non-uniform temperature distributions.
  • Analysis of particle trajectories and accumulation patterns under varying temperature gradient orientations and vibrational conditions.
  • Systematic variation of parameters including vibrational acceleration amplitude/frequency, particle Stokes number, and temperature gradient inversions.

Main Results:

  • Demonstrated that the multiplicity (N) of particle attraction loci can exceed the previously established limit of N=2.
  • Identified a diverse range of novel particle accumulation structures.
  • Established that the existence and characteristics of these structures are dependent on the amplitude and frequency of vibrational acceleration, particle Stokes number, vibration orientation, and the number of temperature gradient inversions.

Conclusions:

  • The orientation and non-uniformity of temperature gradients significantly influence particle dynamics in vibrating fluids.
  • Complex and multiple particle accumulation structures can emerge beyond previously known limits.
  • The findings provide a deeper understanding of particle behavior in complex thermal-fluidic systems, with implications for various applications.