I'm interested in kinetic theory of gases, notably its history.
I know that, after the pioneering work of Boltzmann who derived the Boltzmann equation, it is possible by taking its statistical moment to obtain a set of equations that are closely linked to the Navier-Stokes equation.
This system can be closed either by doing a Hilbert expansion, Chapman-Enskog expansion, Grad's 13 moments and so on ...
However, I've not encountered WHO obtained this unclosed system. Who did plug and write the set of equations obtained from taking zeroth, first and second moment of the distribution function to obtain a Navier-Stokes like system ?
Anybody got a source or informations about it ?