Title of Document: Investigation of Colorless Distributed Combustion (CDC) with Swirl for Gas Turbine Application Ahmed Essam ElDin Khalil Hasan, PhD, 2013 Directed By: Dr. Ashwani K. Gupta Distinguished University Professor Department of Mechanical Engineering Colorless Distributed Combustion (CDC) with swirl is investigated for gas turbine engine applications due to its benefits for ultra-low...

We compare the performance of the fully coupled Newton–Raphson method with the sequential iteration approach (SIA) for solving the implicit time stepping equations of reactive transport modeling. We formulate the implicit time stepping equations for a demonstration model that incorporates homogeneous equilibrium reactions, i.e. carbonate hydrolysis, and a heterogeneous equilibrium reaction, i.e...

With the Lattice Boltzmann method (using the BGK approximation) we investigate the dynamics of Hele-Shaw flow under conditions corresponding to various experimental systems. We discuss the onset of the instability (dispersion relation), the static properties (characterization of the interface) and the dynamic properties (growth of the mixing zone) of simulated Hele-Shaw systems. We examine the ...

Real-time monitoring becomes highly reactive as soon as actions on the real system are as frequent as observations. This requires enhanced decision-making mechanisms, anticipating the complete recognition of typical patterns, comparing possible evolutions to decide next action. Our approach relies on a global architecture mixing a static decision-tree accounting for the context, temporal chroni...

Professor Edward Ephraim O'Brien (“Ted”) has made lasting contributions to the theory and modeling of scalar mixing reaction in turbulent flows. With a doctoral dissertation at The Johns Hopkins University 1960, entitled “On Statistical Behavior Dilute Reactant Isotropic Turbulence,” supervised by legend Stanley Corrsin, company notable pioneer turbulence, John Leask Lumley, Ted's academic trai...

Understanding of flame anchoring in a jet crossflow (JICF) configuration is vital to the design fuel injectors combustion devices. The present study numerically investigates hydrogen-rich injecting perpendicularly into hot vitiated using direct numerical simulation (DNS). governing equations low-Mach-number multicomponent reactive flows are solved, with chemical mechanism for hydrogen-air flame...

Atmospheric boundary layer (ABL) dynamics exert a large influence on atmospheric chemistry, but it is sometimes relegated to a secondary role in the analysis of the behaviour of reactive species within the ABL. Since Butler et al (2008) used the word lessons in their article’s title; I would like to add some extra ones motivated after reading their paper. The first one is related to the vertica...

Reactive and pharmaceutical-grade heparins were used as biologically compatible reducing and stabilizing agents to photochemically synthesize colloidal gold nanoparticles. Aggregates and anisotropic shapes were obtained photochemically under UV black-light lamp irradiation (λ = 366 nm). Heparin-functionalized gold nanoparticles were characterized by Scanning Electron Microscopy and UV-Vis spect...

We present spectral methods of moments for learning sequential models from a single trajectory, in stark contrast with the classical literature that assumes the availability of multiple i.i.d. trajectories. Our approach leverages an efficient SVD-based learning algorithm for weighted automata and provides the first rigorous analysis for learning many important models using dependent data. We st...

The reaction of species in solutions flowing laminarly (without turbulent mixing) inside capillaries was used as the basis for a broadly applicable method of microfabrication. In this method, patterning occurs as a result of transport of reactive species to interfaces within the capillary by laminar flow. A wide range of chemistries can be used to generate structures with feature sizes of less ...