Mechanisms of ignition by transient energy deposition: Regimes of combustion wave propagation

Quenching and Propagation of Combustion without Ignition Temperature Cutoff

We study a reaction-diffusion equation in the cylinder Ω = R×T, with combustion-type reaction term without ignition temperature cutoff, and in the presence of a periodic flow. We show that if the reaction function decays as a power of T larger than three as T → 0 and the initial datum is small, then the flame is extinguished — the solution quenches. If, on the other hand, the power of decay is ...

Transient Ignition and Combustion of Diluted Hydrogen/air Mixtures by a Thin Catalytic Wire

This paper reports on a study of transient ignition and combustion of hydrogen/air mixtures by a heated, thin catalytic wire in a natural convection environment. Modeling of the process is accomplished via a reduced set of heterogeneous kinetic processes which include dissociative adsorption and desorption of both reactants, three fast surface reactions of the Langmiur-Hinshelwood type, and the...

control of the optical properties of nanoparticles by laser fields

در این پایان نامه، درهمتنیدگی بین یک سیستم نقطه کوانتومی دوگانه(مولکول نقطه کوانتومی) و میدان مورد مطالعه قرار گرفته است. از آنتروپی ون نیومن به عنوان ابزاری برای بررسی درهمتنیدگی بین اتم و میدان استفاده شده و تاثیر پارامترهای مختلف، نظیر تونل زنی(که توسط تغییر ولتاژ ایجاد می شود)، شدت میدان و نسبت دو گسیل خودبخودی بر رفتار درجه درهمتنیدگی سیستم بررسی شده اشت.با تغییر هر یک از این پارامترها، در...

Multidimensional Numerical Simulation of Ignition and Propagation of TiC Combustion Synthesis

Simulation of the Transient, Compressible, Gas-dynamic Behavior of Catalytic-combustion Ignition in Stagnation Flows

This paper develops and uses a computation model to explore the transient ignition dynamics of catalytic combustion in a stagnation-flow configuration. The analysis considers the elementary heterogeneous chemistry associated with catalytic behavior at the surface. It also considers gas-dynamic effects in the boundary layer, including temporal and spatial pressure variations. The gas-dynamic eff...