The twin cam mixer (TCM), as a general-purpose mixer, shares many attributes in common with 3D industrial mixers, like the internal mixer. We investigated the mixing process in a 2D TCM with two identical isosceles triangular cams rotating at 0.5 rpm. A 2D numerical model coupled with the species transport model was employed to study the influence of cam height-base ratio and eccentricity qualitatively and quantitatively, and both were found to have a significant effect on the mixing behavior of the mixer. Furthermore, a dimensionless parameter, named the modified pressurization coefficient, is put forward to quantify the geometry of the mixer. The logarithmic relationship between the modified pressurization coefficient and the mixing quality was discovered and expected to provide new ideas for establishing the relationship between the geometric parameters of a mixer and its mixing performance.

双凸轮混合器（TCM）作为通用混合器，与内部混合器等3D工业混合器具有许多共同的属性。我们在二维TCM中研究了两个以0.5 rpm旋转的相同等腰三角形凸轮的混合过程。利用二维数值模型与物种迁移模型相结合，定性和定量地研究了凸轮高底比和偏心率的影响，发现两者都对混合器的混合行为产生重大影响。此外，提出了无量纲参数，称为修正的增压系数，以量化混合器的几何形状。