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Inertial spheroids in homogeneous, isotropic turbulence
Amal Roy1,2, Anupam Gupta3, Samriddhi Sankar Ray2
1Department of Mathematics, Indian Institute of Science, Bangalore 560012, India.
Physical Review. E
|September 27, 2018
Summary
Inertial disks and rods in turbulent flow show alignment and decorrelation times depend on inertia and shape. This preferential sampling impacts particle transport in various natural and industrial settings.
Area of Science:
- Fluid dynamics
- Turbulence research
- Particle dynamics
Background:
- Turbulent flows transport various particles, influencing many natural and industrial processes.
- Understanding the behavior of asymmetric particles in turbulence is crucial for accurate modeling.
Purpose of the Study:
- To investigate the rotational dynamics of inertial disks and rods in 3D turbulent flows.
- To determine how particle inertia and aspect ratio affect alignment and decorrelation timescales.
Main Methods:
- Simulations of inertial disks and rods in homogeneous, isotropic turbulence.
- Analysis of particle rotational dynamics, focusing on alignment and decorrelation.
Main Results:
- Particle alignment and decorrelation timescales are critically dependent on inertia and aspect ratio.
- Inertia causes preferential sampling of local flow geometry by disks and rods.
- Demonstrated the impact of inertia on the statistical behavior of these spheroids.
Conclusions:
- The study elucidates the complex interplay between particle shape, inertia, and turbulent flow dynamics.
- Findings are vital for predicting the transport of asymmetric inertial particles in diverse applications.
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