For 2D axisymmetric blow molding models, Ansys Polyflow can compute the parison thickness. The parison being extruded has at least two surfaces. At each point in the domain, Ansys Polyflow computes the distance between each surface and the point. A symmetric calculation is performed, and at a given location or height along the surface, a unique quantity is given. See Parison Thickness for details about setting up the parison thickness calculation.

The calculation method is valid for relatively thin objects, with little variation in thickness; it is not appropriate for thick objects.