Soft-elastic reactor (SER) has been demonstrated as an alternative approach to effective mixing of viscous liquid. Here, the mixing performance of Newtonian fluid—glycerin water solutions (1200±50 mPa•s) was experimentally investigated for the first time inside a simple cylindrical SER with soft-elastic baffle (SEB) aligned in parallel to the SER axis. Visualization based on an acid-base reaction was used to reveal the presence and the disappearance of isolated mixing regions. The mixing performance was characterized using the mixing curve and the mixing time. The effect of SEB positioning on mixing intensification was explored. Results show that a single SEB could improve mixing efficiency with the optimal positioning angle of 90°. With the increase of the number of the SEBs, the mixing efficiency was found to be improved regardless of positioning angles. Compared with the SER without SEB, adding a single SEB could reduce the mixing time by about 34% at the probe penetration depth of 2.5 cm and the penetration frequency of 1.0 Hz. Efficient mixing for SERs of large length to diameter ratios was also achieved with the presence of SEB.

软弹性反应器 (SER) 已被证明是有效混合粘性液体的替代方法。在此，首次在具有与 SER 轴平行的软弹性挡板 (SEB) 的简单圆柱形 SER 内对牛顿流体 - 甘油水溶液 (1200±50 mPa•s) 的混合性能进行了实验研究。使用基于酸碱反应的可视化来揭示孤立混合区域的存在和消失。使用混合曲线和混合时间来表征混合性能。探讨了 SEB 定位对混合强化的影响。结果表明，单个SEB在最佳定位角度为90°时可以提高混合效率。随着 SEB 数量的增加，发现无论定位角度如何，混合效率都得到提高。与不含SEB的SER相比，在探针穿透深度为2.5 cm、穿透频率为1.0 Hz时，添加单个SEB可将混合时间减少约34%。SEB 的存在也实现了大长度直径比的 SER 的有效混合。