Hydrodynamics and heat transfer in sphere assemblages Cylindrical cell models

In order to evaluate interactions between vaporizing fuel droplets, a cylindrical cell model based on a single sphere has been sugested by the authors in previous works as a replacement for the existing spherical cell model. Since wake effects are important, multisphere cyclindrical cell model has been developed in the present work. The Navier-Stokes and energy equations have been solved numerically within the representative cells for intermmediate Reynolds numbers. Using a nonuniform mesh suited for the problem, several spheres in tandem are considered and the importance of wake effects in considerablay reducing the drag and Nusselt number in the bulk is discussed. The quasiperoidic features of the results are indicated and compared favorably with a model assuming periodicity a priori.