| 释义 |
Schmidt number Physics.|ʃmɪt|
[Named after Ernst Heinrich Wilhelm Schmidt (b. 1892), German engineer.]
A dimensionless number, analogous to the Prandtl number, used in the study of convective mass transfer and evaluated as the ratio of kinematic viscosity to mass diffusivity.
1955D. B. Spalding Some Fundamentals of Combustion vi. 239 Other experimental procedures can easily be conceived with various advantages or disadvantages, the guiding principle being that the Peclet numbers based on flow velocity and on flame speed must be kept constant, and that if possible the Mach number, Prandtl number and Schmidt number..should all have equal values in the model and the original. 1957Jakob & Hawkins Elements of Heat Transfer (ed. 3) xvi. 293 The heat transfer equation may be altered to represent the mass transfer equation by replacing the Nusselt number by the corresponding Nusselt number for mass transfer, and replacing the Prandtl number by the Schmidt number. 1975Croome-Gale & Roberts Airconditioning & Ventilation of Buildings iii. 92 It can be shown that the well-known result expressing Nu [sc. the Nusselt number] as a function of the Reynolds and Prandtl numbers, i.e. Nu = f(Re, Pr), has an analogous form in mass transfer Sh = f(Re, Sc) where Sc is the Schmidt number. |