The radial distance, denoted as “r,” is the distance between a given point and a center or axis. In various fields, including mathematics, physics, and engineering, the radial distance is often used to describe the distance of a point from a reference point, origin, or center in a radial or circular pattern.
- r: Radial distance from point P to the vortex filament
- h: Perpendicular distance from point P to the vortex filament
- 𝜃: Angle between the line connecting point P to the filament and the direction perpendicular to the filament