Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7211061 | Alexandria Engineering Journal | 2017 | 12 Pages |
Abstract
The results show that there is a significant variation between the flow structures around an obstacle when subjected to JICF or CF. The friction factor for JICF is greater than that for cross-flow only (CF) by 88% at the first jet position and Rej/Rec = 4. The irregular distribution of local Nusselt number (Nu) on the impinged obstacle is moderated by increasing the Reynolds number ratios. Increasing Reynolds number ratio increases the average Nusselt number (Nuâ¾) of the downstream obstacles and decreases it for the upstream obstacles. The increment of Nuâ¾ for whole array for JICF than CF is about 26% at JP3 and Rej/Rec = 4. Moreover, the highest value of thermal enhancement factor is attained at JP3 and it equals 12% for Rej/Rec = 4.
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Authors
Hussein M. Maghrabie, M. Attalla, H.E. Fawaz, M. Khalil,