A doublet flow is a potential flow solution that represents the flow field around a doublet. A doublet is a combination of a source and a sink located at the same point with equal strengths but opposite signs. The doublet flow has interesting flow characteristics. It creates a flow pattern where fluid flows radially towards the doublet along the x-axis and radially away from the doublet along the y-axis. The flow lines form a combination of a source and a sink pattern, with a stagnation point (point of zero velocity) located at the center of the doublet. The stream function helps visualize the flow field by providing a mathematical representation of the flow’s behavior.Â
- is the strength of the doublet (equal magnitude but opposite signs for the source and sink),
- is the angle measured from the positive x-axis,
- is the outer radial distance from the origin.