%0 Journal Article %1 Gee1980 %A Gee, D.L. %A Webb, R.L. %D 1980 %J International Journal of Heat and Mass Transfer %K 1980 heat-transfer analysis %N 8 %P 1127 - 1136 %R 10.1016/0017-9310(80)90177-5 %T Forced convection heat transfer in helically rib-roughened tubes %U http://dx.doi.org/10.1016/0017-9310(80)90177-5 %V 23 %X This work presents experimental information for single-phase forced convection in a circular tube containing a two-dimensional rib roughness. It extends the state-of-the-art by examining the effect of the rib helix angle. Although prior studies have proposed that helix angles less than 90° will provide superior heat transfer per unit pumping power, no data have been reported for flow in circular tubes. The present work reports the heat transfer and friction characteristics for air flow with three helix angles (30, 49 and 70°) all having a rib pitch-to-height ratio of 15. The preferred helix angle is approximately 45°. The data are correlated in a form to permit performance prediction with any relative roughness size (). The benefits of the roughness for heat exchanger applications are quantitatively established.

@article{Gee1980, abstract = {This work presents experimental information for single-phase forced convection in a circular tube containing a two-dimensional rib roughness. It extends the state-of-the-art by examining the effect of the rib helix angle. Although prior studies have proposed that helix angles less than 90° will provide superior heat transfer per unit pumping power, no data have been reported for flow in circular tubes. The present work reports the heat transfer and friction characteristics for air flow with three helix angles (30, 49 and 70°) all having a rib pitch-to-height ratio of 15. The preferred helix angle is approximately 45°. The data are correlated in a form to permit performance prediction with any relative roughness size (). The benefits of the roughness for heat exchanger applications are quantitatively established.}, added-at = {2011-01-19T18:06:06.000+0100}, author = {Gee, D.L. and Webb, R.L.}, biburl = {https://www.bibsonomy.org/bibtex/2a9422d49660dea08e60cafe68e898572/thorade}, description = {ScienceDirect - International Journal of Heat and Mass Transfer : Forced convection heat transfer in helically rib-roughened tubes}, doi = {10.1016/0017-9310(80)90177-5}, interhash = {421c2c9cb77f10f5034c722fcbcee23b}, intrahash = {a9422d49660dea08e60cafe68e898572}, issn = {0017-9310}, journal = {International Journal of Heat and Mass Transfer}, keywords = {1980 heat-transfer analysis}, number = 8, pages = {1127 - 1136}, timestamp = {2011-01-19T18:06:06.000+0100}, title = {Forced convection heat transfer in helically rib-roughened tubes}, url = {http://dx.doi.org/10.1016/0017-9310(80)90177-5}, volume = 23, year = 1980 }