Evolution of a double-front Rayleigh-Taylor system using a graphics-processing-unit-based high-resolution thermal
P Ripesi1, L Biferale1, S F Schifano2
1Department of Physics and INFN, University of Tor Vergata, Via della Ricerca Scientifica 1, 00133 Rome, Italy.
Summary
We investigated turbulent evolution from Rayleigh-Taylor instability using a GPU-accelerated lattice-Boltzmann code. High-resolution data revealed key effects from colliding turbulent fronts in a multi-density system.
Area of Science:
- Fluid dynamics
- Plasma physics
- Computational physics
Background:
- Rayleigh-Taylor instability occurs at interfaces between fluids of different densities.
- Turbulent evolution is crucial in astrophysical and inertial confinement fusion scenarios.
- High-resolution simulations are essential for understanding complex fluid phenomena.
Purpose of the Study:
- To investigate the turbulent evolution of a Rayleigh-Taylor instability with a double density.
- To analyze the effects of colliding turbulent fronts in a multi-layer system.
- To detail the performance of an optimized thermal lattice-Boltzmann code for GPUs.
Main Methods:
- Two-dimensional simulations using a highly optimized thermal lattice-Boltzmann code.
- Implementation on a cluster of Graphics Processing Units (GPUs).
- Utilizing an initial condition with three layers of different densities.
Main Results:
- Observed the development of two Rayleigh-Taylor fronts expanding and colliding.
- Highlighted the effects of front collision in the long-time asymptotic regime.
- Generated high-resolution numerical data for detailed analysis.
Conclusions:
- The study provides insights into the complex dynamics of colliding turbulent fronts.
- The optimized lattice-Boltzmann code demonstrates efficiency for high-resolution fluid simulations.
- Findings contribute to the understanding of turbulent phenomena in multi-density systems.
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