The heat transfer performances of pipes with twisted tape inserts having periodically spherical dimple-protrusion patterned walls are numerically investigated by Ansys Fluent under a constant heat flux of 5 W/cm². The inserts having three different densities (N = 0, 30, and 45) and three different kinds of arrangement (composed of only dimples, only protrusions, and a combination of dimples and protrusions) with a constant twist ratio of 3 were tested for Reynolds numbers (Re) within the range from 3000 to 27000. Comparing the turbulence models proposed the validated realizable k-ϵ model coupled with enhanced wall function to employ on the numerical simulations. While the highest Nusselt number (Nu) and friction factor (f) values for the presented study were found for the dense protruded twisted tape (D-PT) arrangement at Re values lower than 18000 and for dense dimpled-protruded twisted tape (D-DPT) arrangement for the Re greater than 18000, dimpled-protruded twisted tape (DPT) and dimpled twisted tape (DT) sequences reached the lowest f values of 0.365 and 0.322 at Re = 3000, respectively. D-DPT and D-PT sequences reached the highest thermal performance factor (TPF) values of 1.508 and 1.478 at Re = 3000, respectively. All patterned twisted tapes performed better Nu than conventional twisted tapes in the analyzing range and performed better TPF than typically twisted tapes in the Re region of less than 6000.

Ansys Fluent 在 5 W/cm ²的恒定热通量下对具有周期性球形凹坑-突起图案壁的扭曲带插入件的管道的传热性能进行了数值研究。具有三种不同密度（N = 0、30 和 45）和三种不同排列方式（仅由凹坑、仅由突起、以及凹坑和突起的组合组成）且扭曲比恒定为 3 的刀片进行雷诺数测试数字 ( Re ) 在 3000 到 27000 的范围内。比较湍流模型，提出了经过验证的可实现 k-ϵ 模型以及增强的壁面函数以用于数值模拟。而最高的努塞尔数 ( Nu ) 和摩擦系数 ( f）被发现为密集于所呈现的研究的值扭曲突出在磁带（DPT）排列重新值大于18000和用于为密集涟漪突出扭转的磁带（d-DPT）布置降低再大于18000，涟漪突出在Re  = 3000 时，扭曲带 (DPT) 和凹陷扭曲带 (DT) 序列分别达到最低f值 0.365 和 0.322 。D-DPT 和 D-PT 序列在Re  = 3000 时分别达到了 1.508 和 1.478 的最高热性能因子 (TPF) 值。在分析范围内，所有图案化双绞带的Nu 性能均优于传统双绞带，并且在Re 中的TPF 性能优于典型扭绞带 6000以内的地区。