%0 Journal Article %1 Syred2001 %A Syred, N. %A Khalatov, A. %A Kozlov, A. %A Shchukin, A. %A Agachev, R. %D 2001 %I ASME %J Journal of Turbomachinery %K heat-transfer dimple 2001 %N 3 %P 609-613 %R 10.1115/1.1348020 %T Effect of Surface Curvature on Heat Transfer and Hydrodynamics Within a Single Hemispherical Dimple %U http://dx.doi.org/10.1115/1.1348020 %V 123 %X Turbulent heat transfer and hydrodynamics have been studied in concavely and convexly curved dimples with Reynolds numbers ranging from 1.3×105 to 3.1×105. The large-scale single hemispherical dimple 50 mm in diameter and 25 mm in depth was arranged on the smooth concave or convex wall of a curved rectangular-shaped passage. The fluid flow and heat transfer measurements, and surface streamline observations were performed within the flow curvature parameter delta**/R ranged from 0.002 to 0.007. The "tornado-like" oscillating vortex bursting periodically out of the dimple was registered in the experiments with a "curved" dimple. This vortex structure is similar to that earlier observed in a "flat" dimple. The surface curvature considerably influences the dimple heat transfer rate in both cases. It enhances heat transfer in a "concave" dimple and reduces it in a "convex" one; however, the more remarkable effect occurred in a concavely curved dimple. The correction factors describing the effect of curvature on average heat transfer in a "curved" dimple have been obtained as a result of experimental study.

@article{Syred2001, abstract = {Turbulent heat transfer and hydrodynamics have been studied in concavely and convexly curved dimples with Reynolds numbers ranging from 1.3×105 to 3.1×105. The large-scale single hemispherical dimple 50 mm in diameter and 25 mm in depth was arranged on the smooth concave or convex wall of a curved rectangular-shaped passage. The fluid flow and heat transfer measurements, and surface streamline observations were performed within the flow curvature parameter delta**/R ranged from 0.002 to 0.007. The "tornado-like" oscillating vortex bursting periodically out of the dimple was registered in the experiments with a "curved" dimple. This vortex structure is similar to that earlier observed in a "flat" dimple. The surface curvature considerably influences the dimple heat transfer rate in both cases. It enhances heat transfer in a "concave" dimple and reduces it in a "convex" one; however, the more remarkable effect occurred in a concavely curved dimple. The correction factors describing the effect of curvature on average heat transfer in a "curved" dimple have been obtained as a result of experimental study. }, added-at = {2011-01-19T18:07:42.000+0100}, author = {Syred, N. and Khalatov, A. and Kozlov, A. and Shchukin, A. and Agachev, R.}, biburl = {https://www.bibsonomy.org/bibtex/23834694830b2912ee3b21a9a5256a12f/thorade}, description = {Effect of Surface Curvature on Heat Transfer and Hydrodynamics Within a Single Hemispherical Dimple}, doi = {10.1115/1.1348020}, interhash = {340de14e487f4c89a9832e2b80d04c0c}, intrahash = {3834694830b2912ee3b21a9a5256a12f}, journal = {Journal of Turbomachinery}, keywords = {heat-transfer dimple 2001}, number = 3, pages = {609-613}, publisher = {ASME}, timestamp = {2011-01-19T18:07:42.000+0100}, title = {Effect of Surface Curvature on Heat Transfer and Hydrodynamics Within a Single Hemispherical Dimple}, url = {http://dx.doi.org/10.1115/1.1348020}, volume = 123, year = 2001 }