NUMERICAL STUDY IN HEAT TRANSFER FOR A TURBULENT PULSED DUCTED FLOW

A numerical model for pulsed turbulent ducted air flows and related heat transfer is presented. A mixing length hypothesis combined with the eddy viscosity and diffusivity model of Cebeci, Habib, and Na is used. Turbulent transport properties are assumed not to change with time. The equation set is solved by means of a finite-difference method coupled with asymptotic developments for the different physical quantities (pressure, velocity, temperature). Assuming a fully developed dynamic regime, the developing steady and unsteady thermal fluid fields, and thus the heat fluxes at the wall, are described for a condition of uniform temperature.