Performance intensification of turbulent flow through heat exchanger tube using double V-cut twisted tape inserts

Schematic and flow structure in heat exchanger equipped with double V-cut TT. [Display omitted] •Turbulent flow through heat exchangers inserted with double V-cut twisted tape is investigated.•Vortex flow passing through the V-cuts intensifies the thermal performance.•The Nusselt number enhances up to 117% with increasing the V-cut ratio from 0 to 1.8.•Collision of swirl flow and flow through the cuts increases the turbulent intensity. This paper aims to present a numerical model for heat transfer intensification in a heat exchanger tube equipped with novel double V-cut twisted tape. The effects of different cut ratios (0.6