viewing secondary flows

ally

Hi,

I am attempting to view secondary flow patterns in a single passage turbine simulation. At present the only way i can think of doing this is to create a second copy of the turbine blade, and use two planes created by the plane at three points method to create a surface in the centre of the blade passage crossing the periodic boundary. The difficulty is that because the planes are duplicated in both domains they overlap making them difficult to view. Is there any easy way around this?