The problem is most likely a Post-processing issue. The mapping from cartesian to mprime (turbo) space in Turbo Post requires a background mesh to represent the turbo geometry. For complex or axially long geometries, more nodes may be required for this background mesh to allow an accurate transformation to turbospace. To fix the wrinkles: 1. Go to the Turbo tab and Double-click the affected component under Initialization. 2. There, expand Background Mesh and increase the number of nodes from 2000 to 4000 or more. 3. Plotting should show an improvement in the wiggles