Development of thermal stresses in reacting media—I. Failure of catalyst particle

Combustion of Metallic Powders: A Phenomenological Model for the Initiation of Combustion

“…the process is modeled only up to the point that melting occurs. • Stresses in the particle can arise due to the effects of the temperature rise (Thiart et al, 1991) as well as the species flux (Chu and Lee, 1990). Chu and Lee (1990) have shown that the effective diffusion coefficient should depend on the concentration, and the stresses in the particle (for the isothermal case).…”

Crack propagation in catalytic pellets due to thermal stresses

“…The inertia terms are often neglected in the latter equations, ruling out the description of shock behavior. Usually the inclusion or exclusion of inertia terms is based on a comparison of the different characteristic times that are involved in the process (Thiart et al, 1991). Inertia terms must be considered when the temperature changes occur on a time scale that is comparable with the time scale for the propagation of mechanical perturbations.…”

Noncatalytic gas‐solid reactions and mechanical stress generation

“…The stress equilibrium equation is steady state because the stress relaxation time is much smaller than any other time scale in the process (Thiart et al, 1991). However, the overall problem is transient in nature.…”