The streamlines of a doublet flow refer to the imaginary curves that depict the paths followed by fluid particles in a flow field created by a doublet. A doublet is a theoretical idealization of fluid flow that consists of a combination of a source (emission of fluid) and a sink (absorption of fluid) placed close to each other.
- r represents the radial distance from the center (or origin) of the doublet flow.
- 𝜅 is the strength of the doublet, which characterizes the intensity of the flow.
- c is a constant that determines the scale or size of the doublet.
- θ polar angle