Stagnation flow and flame simulations

Axisymmetric jets impinging perpendicularly on a wall are encountered in a variety of real-life situations such as Chemical Vapor Deposition (CVD) processes (Goodwin, 2003). Although the fluid mechanics of the wall-impinging jets are interesting phenomena in their own right, this topic is studied here for two reasons. The first is to assess the extent to which experimental data and numerical data agree when no chemical reactions are involved. In particular, since this is the case in which the modeling error is expected to be small as the incompressible Navier-Stokes equations are known to describe uniform density flow well, any uncertainty between measurements and computation will be quantified. The second objective is to learn the general behavior of stagnation flow to apply the knowledge of non-reacting flow to reacting cases. In this study, the nozzle-to-plate separation distance L to nozzle-diameter d ratio range of 0.5 ≤ L/d ≤ 1.5 is studied. This range of L/d has been investigated experimentally and is useful in the study of strain-stabilized flames in combustion research. This type of flow has a well-known approximate similarity solution presented in Schlicht-ing (1960), called Hiemenz flow. This similarity solution is based on an analytical solution for potential flow and used to develop the one-dimensional stagnation flame or opposed-jet