Abstract
Two-dimensional free jets have been numerically studied in the laminar flow regime. The numerical solution was obtained by solving the incompressible Navier-Stokes equations with SMAC finite-difference method. The variation of the axial velocity, potential core and jet spreading width were investigated to make clear the characteristics of free jet at a low Reynolds number. It was found that the fully developed region where the self-similarity is satisfied exists in the downstream of the collapsing point of the potential core. The variation of the core is depended on the Reynolds number. It showed that the half-width of geometry is useful in identifying the similarity. The predicted velocity distributions were in good agreement with those of experimental and theoretical results.
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