Simultaneous development of the laminar flow and heat transfer in helicalsquare ducts was numerically studied. The governing equations were written in an orthogonal helicalcoordinate system and fully parabolized in th...Simultaneous development of the laminar flow and heat transfer in helicalsquare ducts was numerically studied. The governing equations were written in an orthogonal helicalcoordinate system and fully parabolized in the axial direction. Results were found out over a widerange of the governing parameters. Two axial velocity entries were taken into account. Thedevelopment of secondary flow, axial velocity and temperature distribution for the large Dean numberwere examined in detail and the effects of different governing parameters on the friction factorand- the Nusselt number were annlyzee. Many new and interesting conclusions were reached. Thepresent results reveal the nature of fluid flow and heat transfer in the developing region ofhelical square ducts.展开更多
文摘Simultaneous development of the laminar flow and heat transfer in helicalsquare ducts was numerically studied. The governing equations were written in an orthogonal helicalcoordinate system and fully parabolized in the axial direction. Results were found out over a widerange of the governing parameters. Two axial velocity entries were taken into account. Thedevelopment of secondary flow, axial velocity and temperature distribution for the large Dean numberwere examined in detail and the effects of different governing parameters on the friction factorand- the Nusselt number were annlyzee. Many new and interesting conclusions were reached. Thepresent results reveal the nature of fluid flow and heat transfer in the developing region ofhelical square ducts.
