The stream function (ψ) is a dimensionless quantity in fluid dynamics. It is used to describe the flow pattern of an incompressible and irrotational fluid in two dimensions. The stream function (ψ) is a concept used in fluid dynamics to describe the flow of an incompressible and irrotational fluid in two dimensions. It’s a mathematical function that helps visualize and analyze fluid motion.
- ψ is the stream function
- Λ is the strength of the source flow (volume flow rate per unit length)
- θ is the polar angle, measured in radians, with respect to the center of the source