Hello all, long time follower, first time poster. (Also feel free to move this if it's not in the right section.) Basically I have this mechanism pictured here: You can imagine that the drawing is of a top view of a section cut of the total mechanism. This is the radius view, the full diameter would just be a mirrored image across the y-axis. Rough design is to use magnetorheological fluid as a frictional coupling device to open/close a gap located right on the other side of the disk. (Bottom view not pictured.) A recent problem is that when modeled to see what the magnetic flux density looks like, we get a lot of the field propagating around our mechanism instead of traveling through the mechanism. This is a very small, scaled design. For example, the total diameter of the rotating disk is about 30 mm. The MR fluid gap is around .8 mm. Pictured below is the current travel of the magnetic path. We can generate around 1.6 teslas through the mechanism which may be enough but we are trying to increase the density through the mechanism. Any tips or tricks are greatly appreciated. If any further information/clarity is needed, just let me know. Thanks, Jordan.