期刊
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
卷 104, 期 -, 页码 257-265出版社
ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
DOI: 10.1016/j.ijthermalsci.2016.01.012
关键词
Impinging jet; Non-Newtonian fluid; Heat transfer; Multiple jets
Laminar power-lawn on-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 0.4-1.6 and dimensionless jet-to-plate spacings 0.25-1.0. 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. (C) 2016 Elsevier Masson SAS. All rights reserved.
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