kiirgradientidel
Kiirgradientidel is a term used in Estonian scientific literature to refer to phenomena related to the spatial variation of velocity in a fluid or deforming medium. Velocity gradients describe how the speed and direction of motion change from point to point within a flow, field, or material.
Mathematically, the velocity gradient is represented by a tensor whose components are the partial derivatives of
In practice, kiirgradientidel underpin concepts such as shear rate, shear stress, and turbulence generation. They are
Measurement and computation rely on experimental techniques such as particle image velocimetry and laser Doppler velocimetry,
Related concepts include the velocity gradient tensor, vorticity, and the Navier–Stokes equations. See also turbulence models