Meridian and Parallel Meshing on a Rotational Surface - Engineering Diagram #1534367 (License: Personal Use)

This engineering diagram depicts a discretized rotational surface, where triangular elements form a mesh across the surface. Labels 'm' denote meridional lines (running pole-to-pole), while 'f' marks parallel lines (circles of latitude), both critical in axisymmetric modeling. The right-side profile (b) shows the generating curve extruded around the axis, clarifying how the 3D shape is constructed from 2D geometry.

Used in mechanical engineering, computational geometry, and finite element method (FEM) documentation to explain mesh generation for axisymmetric bodies like pressure vessels, turbine blades, or optical lenses; targets users seeking technical visualization for simulation setup or academic instruction.