The wetting behavior of remaining isolated liquid bridges between particle interfaces determines the efficiency of filter cake dewatering. Micro-processes during and after dewatering can be traced by means of direct X-ray microtomography (ZEISS Xradia 510 Versa) providing insights into the filter cake structure.

We measure the local contact angle between the immiscible phases on the pore scale after in-situ filter cake dewatering. By tracing the three-phase contact line and the two perpendicular vectors belonging to the solid and liquid surface, the contact angle is obtained from their scalar product at every mesh-node.

The range of the resulting distribution and curvature increases with the degree of roughness, becoming more obvious for larger contact angles. The occurring roughness causes a naturally water-repellent surface and leads to low liquid saturations. The resulting angular distribution serves for a more accurate prediction of multiphase flow in pore networks as input for further pore model enhancement.

颗粒界面之间剩余的孤立液体桥的润湿行为决定了滤饼脱水的效率。可以通过直接X射线显微断层照相术（ZEISS Xradia 510 Versa）追踪脱水过程中和脱水后的微观过程，从而深入了解滤饼的结构。

在原位滤饼脱水后，我们在孔尺度上测量不混溶相之间的局部接触角。通过跟踪三相接触线和属于固体和液体表面的两个垂直向量，可以从它们在每个网格节点处的标量积获得接触角。

所得分布和曲率的范围随粗糙度的增加而增加，对于较大的接触角而言变得更加明显。出现的粗糙度会导致表面自然疏水，并导致液体饱和度低。所得的角度分布可用于更准确地预测孔隙网络中的多相流，作为进一步增强孔隙模型的输入。