## History of airplanes

Ornithopters Ornithopters are like birds having wings; earliest design for airplanes come from this concepts. This usually mimics the flapping …

## Importance of Coefficients (Lift and Drag)

Aerodynamic coefficients plays an important role in performance analysis as well as  design of aeroplanes.Coefficient of lift is defined as …

## Pathlines-Streamlines-Streaklines

Pathlines: It is the path traced by a fluid particle over a given period of time.For unsteady flow,path lines for …

## Lifting flow over a cylinder

Lifting flow over a circular cylinder can be synthesised as superposition of a vortex flow of strength $$\tau$$ with non …

## Non Lifting flow over a circular cylinder

When there is a superposition of a uniform flow with a doublet (Which is a source-sink pair of flows), a …

For an incompressible flow $$\rho = {\rm{constant}}$$. $$\nabla \cdot V$$ is physically the time rate of change of volume of a moving …