This paper presents the findings from a research study using computational fluid dynamics (CFD) on the impact of different diameter Ball Tabulators Inserts (BTI) on the three-dimensional flow pattern and heat transfer characteristics within a circular tube. This analysis was carried under uniform heat flux conditions with different BTI diameters (1, 2, 3, 4, 5, 6, 7, and 8 mm). Fluid flow, pressure drop, dynamic pressure, velocity components, thermo-hydraulic, turbulent kinetic energy, and turbulent viscosity were analysed qualitatively and quantitatively. The performance evaluation results revealed that the characteristics of flow behaviour and the velocity field contours variations are closely associated with the BTI configurations. Also, the computational results indicated that the change in fluid flow velocity near the pipe wall and around the BTI is important parameters for the heat transfer enhancement as compared to that obtained without BTI under the same conditions. Moreover, using BTI presented a distinguished influence on the rate of heat transfer. Additionally, vortex flow through means of this kind of BTI is an important parameter in the enhancement of heat transfer. The use of BTI can enhance the rate of heat transfer performance by more than 46%. Furthermore, the maximum value for the PEF is found to be more than 1.03.

本文介绍了使用计算流体动力学 (CFD) 研究不同直径球形制表器插件 (BTI) 对圆管内三维流动模式和传热特性的影响的研究结果。该分析是在具有不同 BTI 直径（1、2、3、4、5、6、7 和 8 毫米）的均匀热通量条件下进行的。对流体流动、压降、动压、速度分量、热工水力、湍动能和湍流粘度进行了定性和定量分析。性能评估结果表明，流动行为特征和速度场等值线变化与 BTI 配置密切相关。还，计算结果表明，在相同条件下，与没有 BTI 的情况相比，管壁附近和 BTI 周围流体流速的变化是增强传热的重要参数。此外，使用 BTI 对传热速率有显着影响。此外，通过这种 BTI 装置的涡流是增强传热的重要参数。使用BTI可使传热性能提高46%以上。此外，发现 PEF 的最大值大于 1.03。通过这种 BTI 装置的涡流是增强传热的一个重要参数。使用BTI可使传热性能提高46%以上。此外，发现 PEF 的最大值大于 1.03。通过这种 BTI 装置的涡流是增强传热的一个重要参数。使用BTI可使传热性能提高46%以上。此外，发现 PEF 的最大值大于 1.03。