Thermohydraulic investigation of turbulent flow through a round tube equipped with twisted tapes consisting of centre wings and alternate-axes

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Heat transfer and friction factor characteristics in turbulent flow through a tube fitted with perforated twisted tape inserts (2013, unknown): “were investigated experimentally in circular tube fitted with serrated twisted tapes [7,20], with twisted tapes consisting center wings and alternate axes [21] andwith a peripherally cut twisted tape has an alternate axes [22].”
Enhancement of heat transfer using CuO/water nanofluid and twisted tape with alternate axis☆ (2011, methodology): “modified twisted tapes were employed with water (base fluid) and it was found that the heat transfer enhancement depended strongly on their shapes and geometries [11–24].”
The heat transfer enhancement techniques and their Thermal Performance Factor (2018, background): “…10000 1.53 3.73 14.8 Eiamsa-ard et al. (2013a) Twin Delta winged tape Twist ratio-3,Wing tip angle-20 -60 ,Wing declination angle-15 5000 1.24 2.54 8.78 Water Twin Delta winged tape 10000 1.12 2.10 6.64 Eiamsa-ard et al. (2010a) Delta winglet twisted tape Twist rati-3–5, Depth of wing cut ratio-0.”