An asymptotic theory of condensed phase combustion with inert melting

Polymer Combustion and Flammability-role of the Condensed Phase*

The combustion process of polymers is a complex coupling of energy feedback from a flame to the polymer surface with gasification of the polymer to generate combustible degradation products. Although there are extensive studies of the effects of wind velocity, gas phase oxygen concentration, external thermal radiation, and gravity on the combustion of polymers, the effects of polyruer character...

Using MAPLE for the Analysis of Bifurcation Phenomena in Condensed-Phase Surface Combustion

This article describes the use of the symbolic manipulation language MAPLE for the analysis of bifurcation phenomena in condensed-phase combustion. The physical problem concerns the structure and stability properties of a combustion front that propagates in the axial direction along the surface of a cylindrical solid fuel element. Experimental observations suggest that the front may propagate i...

Transient Numerical Simulation of Combustion in Inert Porous Media

This paper presents methods for the time-dependent numerical solution of a two-dimensional model governing combustion in inert porous media. The spatial discretization is based on a mixed nite element method for the ow problem and a cell-centered nite volume scheme for the transport equations. Some results of numerical simulations show the innuence of a jump in the porosity of the solid matrix ...

An intermediate phase in DNA melting

We predict a novel temperature-driven phase transition of DNA below the melting transition. The additional, intermediate phase exists for repetitive sequences, when the two strands have different lengths. In this phase, the excess bases of the longer strand are completely absorbed as bulge loops inside the helical region. When the temperature is lowered, the excess bases desorb into overhanging...

Combustion Theory