We present a theoretical and experimental study of the dynamics of a fluid through non-rectilinear capillaries. Penetration (imbibition), or rise, in capillaries with a smooth geometry changing under the influence of temperature gradients is a topic that has attracted considerable interest because of the various applications within the inkjet, cosmetics and crude oil extraction industries. The theoretical model we present has been validated with laboratory results; using an experimental acrylic cell in which conical capillary perforations were made. The results show the dependence on temperature effects of both the change in geometry and the change in viscosity and surface tension. The fluid used in the experiments was glycerol, and the images presented here show the penetration and ascent of the liquid within the capillary. The theoretical and experimental results correlate well.

我们对通过非直线毛细管的流体动力学进行了理论和实验研究。由于在喷墨、化妆品和原油提取行业中的各种应用，在温度梯度影响下具有平滑几何形状变化的毛细管中的渗透（吸入）或上升是一个引起相当大兴趣的话题。我们提出的理论模型已经过实验室结果的验证；使用实验性丙烯酸池，其中进行了锥形毛细管穿孔。结果显示了几何形状变化以及粘度和表面张力变化对温度影响的依赖性。实验中使用的流体是甘油，此处显示的图像显示了液体在毛细管内的渗透和上升。