Abstract
The effect of impinging uniform jet on flow and heat transfer over isothermal moving plate is investigated. The flow and temperature fields are studied numerically with different jet velocity ratio (jet to plate velocity ratio 0-5). The laminar flow field is analyzed numerically by solving the steady, two-dimensional incompressible Navier-Stokes and energy equations. A collocated (non-staggered) grid is used in the momentum equations, which discretized by finite volume method, SIMPLE algorithm is used to adjust the velocity field to satisfy the conservation of mass. The range of Reynolds number is (Re = 10 - 100). The results show that at high jet velocity ratio (V/U = 5) and Reynolds number (Re = 100), the rate of heat transfer from the plate is doubled.
Highlights
A continuously moving surface through an otherwise quiescent medium has many applications in manufacturing processes
In figure (4a-d, left) the contours of the predicted streamlines are shown for jet velocity ratio (0, 1, 3, and 5) for Reynolds number (Re = 10)
As the jet velocity ratio increases while the velocity of the plate remain constant, at this low Reynolds number there is no effect from the jet on the isothermal lines as shown in figure (4a-d, right), so that the average Nusselt number remains constant as shown in figure (6)
Summary
A continuously moving surface through an otherwise quiescent medium has many applications in manufacturing processes. The finite- difference method using the full governing equations was used by Karwe and Jaluria [4] and [5], for uniformly moving flat plate with a uniform temperature at the slit, to study the effects near the slit from which the plate emerges. Kang and Jaluria [6] included the buoyancy effects on moving plate in materials processing In these papers, the effect of jet on the moving plate was not included. The motion of the fluid is assumed to be laminar, steady, and two dimensional with thermal active incompressible viscous fluid with constant properties Subject to these assumptions the governing equations in dimensionless form can be written as:
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