Fig. 2From: Finite element analysis of biological soft tissue surrounded by a deformable membrane that controls transmembrane flowThe flow components under the deformation. Red bold solid lines represent the flows at the membrane. Blue bold dashed lines represent the transmembrane flow, a flow velocity component perpendicular to the membrane. By setting the z-axis along the normal vector of the membrane, the transmembrane flow coincides with the flow velocity z-component wz in the initial states. However, when a large deformation occurs, the normal vector of the membrane does not coincide with one of the axes x, y (not illustrated) or z, and the transmembrane flow does not coincide with the axis component of the flow velocity wx, wy (not illustrated) or wzBack to article page