Encyclopedia > Nusselt number

Article Content

Nusselt number

The Nusselt number is a dimensionless number equal to the dimensionless temperature gradient at the surface in a convection situation. It therefore measures the heat transfer occurring at that surface.

 Nu_L = h L / k_f

  L  characteristic length
  k_fthermal conductivity of the fluid
  h convection heat transfer coefficient

All Wikipedia text is available under the terms of the GNU Free Documentation License

Search Encyclopedia

Search over one million articles, find something about almost anything!

Featured Article

Sanskrit language

... reduplication. Also extremely common is vowel gradation; every root has (not necessarily all distinct) zero, guna[?], and vrdhii[?] grades. If V is the vowel of the zero ...