Fluid dynamics, also termed fluid mechanics, is a very important and broad study of fluids in motion, impacting most engineering disciplines, weather and climate modeling, city and home water distribu...Fluid dynamics, also termed fluid mechanics, is a very important and broad study of fluids in motion, impacting most engineering disciplines, weather and climate modeling, city and home water distribution systems, etc. The maximum flow velocity vm is at the centerline and is equal to twice the average flow velocity. (Figure from Georgia State University, http://hyperphysics.phyastr.gsu.edu/hbase/pfric2.html