Peclet number
/ˈpɛkleɪ ˌnʌmbə/(also Péclet number) Physics
noun
A dimensionless parameter used in calculations of heat transfer between a moving fluid and a solid body, representing the ratio of the convected to the conducted heat and equal to the product of the Reynolds number and the Prandtl number, viz. Dvc p/k, where D is a characteristic length of the body, v is the speed of the fluid past it, c p is the heat capacity of unit volume of the fluid at constant pressure, and k is its thermal conductivity. Abbreviated Pe.
Origin
1930s. From the name of J. C. E. Péclet, French physicist + number.