Nanofluids heat transfer in a helical coil under pulsation condition was numerically simulated. The dynamic single phase model which considered Brownian motion effect was utilized to study the Al₂O₃ nanofluids heat transfer in helical coils. The reliability test results were consistent with experimental results. Then, pulsation was further imposed. The influence of the pulsation frequency on the heat transfer performance was explored. And the changes of instantaneous h with frequency were further studied to interpret the results. The axial velocity contours, axial velocity distributions, and cross-section velocity vectors at various planes along the coil were examined. The results revealed that there was an optimum pulsation frequency for heat transfer augmentation within the scope of Re. The secondary flow generated in cross region and the counter-rotating vortex formed in the axial direction all devoted to the helical coil heat transfer augmentation under pulsation.

数值模拟了螺旋流体中脉动条件下纳米流体的传热。利用考虑布朗运动效应的动态单相模型研究了螺旋线圈中Al ₂ O ₃纳米流体的传热。可靠性测试结果与实验结果一致。然后，进一步施加脉动。探索了脉动频率对传热性能的影响。和瞬时h的变化随着频率的进一步研究，以解释结果。检查沿线圈的各个平面上的轴向速度轮廓，轴向速度分布和截面速度矢量。结果表明，在Re的范围内，有一个最佳的脉动频率来增加传热。在横向区域中产生的二次流和在轴向方向上形成的反向旋转涡流均专门用于脉动下螺旋线圈传热的增加。