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Velocity and geometry of propagating fronts in complex convective flow fields
1Department of Biomedical Engineering and Mechanics, Virginia Tech, Blacksburg, Virginia 24061, USA.
Physical Review. E
|February 21, 2019
Summary
Reacting front propagation in complex 3D flows is studied. Front velocity depends on flow type: smooth in cellular flow, but complex and fractal in chaotic/turbulent flows.
Area of Science:
- Fluid dynamics
- Chemical reaction engineering
- Complex systems
Background:
- Reacting fronts are crucial in various scientific and engineering fields.
- Understanding front propagation in complex flows is challenging.
Purpose of the Study:
- To numerically investigate reacting front propagation in 3D cellular, chaotic, and turbulent flows.
- To quantify front velocity scaling with flow parameters and geometry.
Main Methods:
- Numerical simulations of reacting fronts in 3D convection roll flow fields.
- Analysis of front velocity and interface geometry using box counting dimension.
Main Results:
- Front velocity is sensitive to convection roll orientation in cellular flow.
- In chaotic and turbulent flows, front velocity depends on interface complexity, not roll orientation.
- Front interfaces exhibit fractal behavior in chaotic and turbulent flows.
Conclusions:
- Flow complexity significantly alters reacting front dynamics and geometry.
- Fractal dimensions characterize front interfaces in complex turbulent flows.
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