Laminar fluid flow and heat transfer through a circular tube having spiral ribs and twisted tapes

作者：Pal Sagnik; Saha Sujoy Kumar^*

来源：Experimental Thermal and Fluid Science, 2015, 60: 173-181.

DOI：10.1016/j.expthermflusci.2014.09.005

• Laminar forced convection
• Integral spiral rib roughness
• Twisted tapes with oblique teeth
• Heat transfer enhancement
• Swirl flow

The experimental friction factor and Nusselt number data for laminar flow of viscous oil through a circular duct having integral spiral rib roughness and fitted with twisted tapes with oblique teeth have been presented. Predictive friction factor and Nusselt number correlations have also been presented. The thermohydraulic performance has been evaluated. The major findings of this experimental investigation are that the twisted tapes with oblique teeth in combination with integral spiral rib roughness perform significantly better than the individual enhancement technique acting alone for laminar flow through a circular duct up to a certain value of fin parameter.

• 出版日期2015-1