I believe the PDE Utt-v^2*(Uxx+Uyy+Uzz) can be used to desribe air pressure, and how this pressure changes during time (with a given pressure in t=0) My question is, does this equation also takes into account effects of movement of particles? Such as wind? Can it describe wind? Or do we need some other equation to descibe wind? What equation can be used to describe wind? Thanks in advance.