scispace - formally typeset
Search or ask a question

Showing papers by "Ephraim M Sparrow published in 2015"


Journal ArticleDOI
TL;DR: In this article, the authors compared the performance of plain-finned and louver-fin-based heat exchanger with the baseline case of a plain-fins-based Heat Exchanger.

15 citations


Journal ArticleDOI
01 Sep 2015
TL;DR: In this paper, a comprehensive study of the drag forces acting on flat-sided columns is presented, which considers a range of plane-sided column sections, from a sharp-cornered square section to varying degrees of corner chamfering and a full octagonal section.
Abstract: A comprehensive study of the drag forces acting on flat-sided columns is presented. The study considers a range of plane-sided column sections, from a sharp-cornered square section to varying degrees of corner chamfering and a full octagonal section. All chamfering was found to reduce the drag compared with the sharp-cornered case. It was also found there is a slight decrease in the drag coefficient as the Reynolds number of the fluid increases. For all cases except the octagonal section, drag increases significantly with increasing angle of attack. For the octagonal section, the drag coefficient increases then decreases as the angle of attack changes. The results agree with corresponding cases in the literature. The results are presented in a sequence of tables that allow users to estimate drag coefficients for any of the cases presented in the paper. As such, the study can serve as an archival repository for drag coefficient information. Comparisons of flow patterns are made, particularly in the wake re...

5 citations


Journal ArticleDOI
TL;DR: In this article, the authors demonstrate that the performance of a convective heat transfer device may be strongly impacted by the nature of the flow provided to it by the specific participating fluid mover.

4 citations


Journal ArticleDOI
15 Sep 2015-Wear
TL;DR: In this article, a tensile testing machine is used for the measurement of sliding friction between a stationary flexible polymeric sleeve and a rigid metallic rod that moves longitudinally within the sleeve.

3 citations


Journal ArticleDOI
15 Mar 2015-Wear
TL;DR: In this article, it was discovered by systematic experimentation that transfer of material, rather than traditional wear, is at the root of the encountered running-in phenomena, and a method for eliminating runningin was proposed and experimentally validated.

2 citations


Journal ArticleDOI
TL;DR: In this paper, the essential role of fluid-mover operating characteristics in affecting heat transfer enhancement is presented and implemented, and a case study involving surface geometry enhancement by means of louvered fins is considered along with its unenhanced plain-fin counterpart.

1 citations