The Large Eddy Simulation approach was used to perform a numerical simulation of a flow around a circular tube bundle. The model is based on numerical tools, such as the immersed boundary technique and the extrapolation of pressure in the solid region of the tube, to represent a helical segmented-fin tube geometry. The simulation was conducted in an area away from the boundaries of the tube bundle, where the flow is fully-developed, and the use of periodic boundary conditions was possible. The mean velocity and turbulence values of the results and experimental data were compared and showed good general agreement. From the instantaneous results, it was possible to observe and study different turbulent structures presented in the flow. Two counter-rotating horseshoe vortices were identified in the space between the fins, which can improve heat transfer. Furthermore, a relevant transfer of momentum in the inter-segment space and contiguous zones was observed.

大涡模拟方法用于对圆形管束周围的流动进行数值模拟。该模型基于数值工具，例如浸入边界技术和管子实体区域中的压力外推法，以表示螺旋分段翅片管几何形状。模拟是在远离管束边界的区域进行的，这里的流动是完全发展的，并且可以使用周期性边界条件。结果和实验数据的平均速度和湍流值进行了比较，显示出良好的一般一致性。根据瞬时结果，可以观察和研究流动中呈现的不同湍流结构。在翅片之间的空间中发现了两个反向旋转的马蹄形涡流，可以改善传热。此外，还观察到段间空间和相邻区域中的相关动量转移。