These things are distinguished from the Euler equations because they account for situations which are not inviscid.
A 1968 paper by Chorin presents a nite-di erence method for numerically approximating a solution to these things. A book titled after these things by Roger Temam includes an appendix about the curl operator and chapters about their steady-state and evolution type. These things are distinguished from the Euler equations because they account for situations which are not inviscid. One of the Millenium problems asks whether a smooth solution exists to the three-dimensional version of these equations. For ten points, identify these doubly-eponymous di erential equations which describe the motion of uids with nonzero viscosity. 
A 1968 paper by Chorin presents a nite-di erence method for numerically approximating a solution to these things.
Navier-Stokes equations [you don't need equations after it's read] 