What Is the Nusselt Number?

The Nusselt number is a dimensionless number in fluid mechanics and heat transfer. It is named after the German physicist Wilhelm Nusselt in honor of his research in this area. breakthrough.

Nusser number

The Nusselt number is a dimensionless number in fluid mechanics. It is named after the German physicist Wilhelm Nusselt to commemorate his breakthrough in this area. The physical meaning of the Nusser number is

The calculation relation is:

L: is the geometric characteristic length of the heat transfer surface, a dimension perpendicular to the direction of the heat transfer surface, the unit is m; such as the diameter of the heat pipe, the thickness of the heat transfer layer, etc.

h: convective heat transfer coefficient of the fluid, the unit is W / (m ^ 2 · K);

k: thermal conductivity of the stationary fluid in W / (m · K) ^[1] .