释义 |
Rayleigh number 3 Rayleigh number 3[′rā·lē ¦nəm·bər ′thrē] (thermodynamics) A dimensionless number used in the study of combined free and forced convection in vertical tubes, equal to Rayleigh number 2 times the Nusselt number times the tube diameter divided by its entry length. Symbolized Ra3. |