Linearized

Linearized potential flow This is potential-flow theory with the further assumptions that the airfoil is very thin and the angle of attack is small.

So: : In that case, the linearized small-perturbation potential equation — an approximation to the full potential equation — can be used: : with the Mach number of the incoming free stream.

Such linearized gravitational waves are sufficiently accurate to describe the exceedingly weak waves that are expected to arrive here on Earth from far-off cosmic events, which typically result in relative distances increasing and decreasing by or less.

The algebraic equations to be solved are simple to set up, but of course are non-linear, requiring iteration of the linearized equations.