Wall heat transfer enhancement of a channel by introducing an adiabatic square cylinder as a vortex generator is investigated numerically and reported. An open-source computational fluid dynamics toolbox, OpenFOAM is used for the present numerical investigation where a base solver icoFOAM is modified by incorporating the energy equation for analyzing the heat transfer characteristics. The cylinder position; axial (in the direction of flow) and transverse (normal to the flow direction) both the locations are varied to analyze the effect of these parameters on the wall heat transfer performance of the channel. In addition, the effect of change of channel length and height along with Reynolds number on the heat transfer characteristics are investigated. The present result indicates that the position of an adiabatic cylinder for enhancing the wall heat transfer in a channel may not be presumed a priori. It is observed that axial and transverse location of cylinder has significant influence on the enhancement of heat transfer rate. An optimum location of cylinder is observed based on maximum Nusselt number. Further, the Nusselt number is noticeably affected by the channel length and height along with Reynolds number. Thus, the location of a cylindrical vortex generator in a channel needs to be optimized for maximum thermal performance and cannot be ascertained a priori. For this purpose, a correlation of thermal performance with cylinder location, channel dimension, and Reynolds number is presented in the present study, and then the optimized location of the adiabatic cylinder is found for maximum thermal performance by using Particle Swarm Optimization (PSO).

通过引入绝热方形圆柱体作为涡流发生器对通道壁传热增强进行了数值研究和报告。OpenFOAM 是一个开源计算流体动力学工具箱，用于当前的数值研究，其中通过结合能量方程来修改基本求解器 icoFOAM 以分析传热特性。气缸位置；轴向（沿流动方向）和横向（垂直于流动方向）两个位置都发生变化，以分析这些参数对通道壁传热性能的影响。此外，研究了通道长度和高度随雷诺数变化对传热特性的影响。目前的结果表明，不能先验地假定用于增强通道中壁传热的绝热圆柱体的位置。观察到圆柱体的轴向和横向位置对传热率的提高有显着影响。基于最大努塞尔数观察圆柱体的最佳位置。此外，努塞尔数明显受通道长度和高度以及雷诺数的影响。因此，圆柱涡流发生器在通道中的位置需要优化以获得最大的热性能，并且不能先验确定。为此，本研究介绍了热性能与气缸位置、通道尺寸和雷诺数的相关性，