A5030739621- Combustion and Detonation Processes
- Fire dynamics and safety research
- Combustion and flame dynamics
- Energetic Materials and Combustion
- Gas Dynamics and Kinetic Theory
- Aerodynamics and Acoustics in Jet Flows
- Particle Dynamics in Fluid Flows
- Fluid Dynamics and Turbulent Flows
- Wind and Air Flow Studies
- Computational Fluid Dynamics and Aerodynamics
- Earthquake Detection and Analysis
- Risk and Safety Analysis
- Structural Response to Dynamic Loads
- Advanced Combustion Engine Technologies
- Laser-Plasma Interactions and Diagnostics
- Heart Rate Variability and Autonomic Control
- Rocket and propulsion systems research
- Graphite, nuclear technology, radiation studies
- Paleopathology and ancient diseases
- Particle accelerators and beam dynamics
- EEG and Brain-Computer Interfaces
- Gyrotron and Vacuum Electronics Research
- Advanced Thermodynamics and Statistical Mechanics
- Advanced MRI Techniques and Applications
- Cardiac electrophysiology and arrhythmias
Case Western Reserve University
2018-2024
University of Ottawa
2010-2024
Wilfrid Laurier University
2023
University of Victoria
2018
Wm. Jennings Bryan Dorn VA Medical Center
1994
The present study addresses the reaction zone structure and burning mechanism of unstable detonations. Experiments investigated mainly two-dimensional methane–oxygen cellular detonations in a thin channel geometry. sufficiently high temporal resolution permitted determination probability density function shock distribution, power law with an exponent $-3$ , rate unreacted pockets from their edges – through surface turbulent flames speed approximately 3–7 times larger than laminar one at...
The attenuation and re-initiation mechanism of detonations transmitted through a porous section consisting two-dimensional array staggered cylinders was investigated experimentally numerically for acetylene–oxygen mixtures. It found that the leading order is wave diffraction around cylinders. local re-amplification permitting self-propagation due to reflections from adjacent obstacles. critical conditions transmittance detonation were correspond approximately pore size equal 30–60 induction...
Historically, it has been a challenge to simulate the experimentally observed cellular structures and marginal behavior of multi-dimensional, thin-channel hydrogen detonations in presence losses, even with detailed chemistry models. Very recently, quasi-two-dimensional inviscid approach calorically perfect gas two-step was pursued, where losses due viscous boundary layers were modeled by inclusion an equivalent mass divergence lateral direction using Fay's source term formulation Mirels'...
Data from both brain lesion and stimulation experiments suggest that area 32 of the medial prefrontal cortex (prelimbic area) participates in acquisition and/or expression conditioned bradycardia. This report describes designed to determine whether cells this exhibit changes neural activity during classical conditioning can be related these learned heart rate changes. Thus, multiple- single-unit was recorded rabbits Pavlovian (HR) conditioning. In first experiment, neuronal discharge...
In this study, we revisit the problem of detonation diffraction in mildly irregular ethylene–oxygen mixtures using high resolution numerical simulations. particular, focus on re-initiation diffracted waves critical regime and role transverse detonations re-establishment detonation. This is significant for characterizing wave propagation as well development next-generation engines. A thermochemically derived four-step combustion model that responds appropriately to thermodynamic state behind...
The generic problem of ignition a particle undergoing an expansion given by power law rate decay behind decaying shock is addressed in the present study. It demonstrated, using one-step Arrhenius irreversible reaction, that sufficiently strong wave can quench reaction. critical conditions for extinction are obtained closed form terms time scale process and thermochemical properties gas, yielding Damkohler number, i.e., ratio to homogeneous scale, (γ−1)(Ea/RT)−1/n, where n exponent...
Interactions of mildly irregular detonation waves with sharp interfaces separating combustible mixtures from an inert gas were modeled numerically using the compressible linear eddy model for a large simulation (CLEM-LES) approach. In recent experiments Lieberman and Shepherd [“Detonation interaction interface,” Phys. Fluids 19, 096101 (2007)], such interactions resulted in transmitted shock-turbulent mixing zone (TMZ) complex as reactive wave traveled through interface fuel rich...