0 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 Engineering principles applied to biological systems gate2016 engineering-principles-applied-to-biological-systems + – Milicevic3306 7.9k points answer comment Share Follow 0 reply Please log in or register to add a comment.