0 votes 0 votes Prandtl number is the ratio of thermal diffusivity to momentum diffusivity mass diffusivity to momentum diffusivity momentum diffusivity to thermal diffusivity thermal diffusivity to mass diffusivity Others gate2016 + – Milicevic3306 asked Mar 26, 2018 • edited Dec 4, 2020 by go_editor Milicevic3306 7.9k points answer comment Share Follow See all 0 reply Please log in or register to add a comment.