A thermodynamic framework for chemically reacting systems is put to use in kinetic modeling of any chemical system with N species undergoing M reactions. A new approach of deriving kinetic models from a Gibbs potential, of multivariate polynomial function, is demonstrated with an example of single reaction system involving three species. Also, the usual first order kinetics is deduced as a special case in the example. The distinct advantages of the new approach lies in obtaining the evolution of concentrations of species, their individual chemical potentials and the specific Gibbs potential and is demonstrated for a single reaction system as an example. Oxidation in polymer composites is studied with a coupled reaction-diffusion model obtained using first order kinetics and is solved for a boundary value problem that predicts the concentration of species over space and time. Concentration of oxidized products is correlated with modulus of aged sample and degradation effects is calculated in case of simple torsion.
This paper provides a computational fluid dynamics (CFD) study of the wedge-duct over turbine blade for flow and heat transfer coefficient characteristics. The influence of flow parameters on drop in pressure and heat transfer is investigated using Reynold's numbers of 10000, 20000, and 30000. Two cases of air coolant at 65ºC (Case 1) and 100ºC (Case 2) are considered. Case 1 delivers a low friction coefficient and a better thermal performance parameter, which improves heat transfer of the disturbed pin-fin layout within the wedge duct. Combustion chamber internal walls experience exceptionally high temperatures and heat flux. As a result, arrayed pin fins can be used to improve the heat transfer and cooling efficiency.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.