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Abstract
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Laminar power-law non-Newtonian fluid flow and heat transfer characteristics of multiple impinging
square jets have been studied, numerically. The effect of inlet Reynolds number, jet-to-plate spacing and
fluid power-law index on the flow structure and wall Nusselt number has been investigated. Numerical
results have been presented for Reynolds numbers 100, 200, power-law indices 0.4e1.6 and dimensionless
jet-to-plate spacings 0.25e1.0. Results showed that for a given Reynolds number and consistency
coefficient, increasing of the power-law index leads to the higher impingement velocity and higher wall
Nusselt number. For higher jet-to-plate spacings, the peripheral entrainment vortices are created around
the jet body and by decreasing the spacing, these vortices disappear. Furthermore, the numerical results
showed that decreasing of jet-to-plate spacing increases the wall Nusselt number.
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