Difference between revisions of "Nusselt number"
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| − | A dimension-less parameter characterizing the intensity of convective heat exchange between the surface of a body and the flow of a gas (fluid): $\mathrm{Nu}=\alpha l/\lambda$, where $\alpha=Q/S\Delta T$ is the coefficient of heat exchange, $Q$ is the amount of heat radiated (or received) by the surface of the body in unit time, $\Delta T>0$ is the difference between the temperature of the surface of the body and that of the gas (fluid) outside the boundary layer, $S$ is the area of the surface, $l$is the characteristic length, and $\lambda$ is the coefficient of heat conductivity of the gas (fluid). | + | A dimension-less parameter characterizing the intensity of convective heat exchange between the surface of a body and the flow of a gas (fluid): $\mathrm{Nu}=\alpha l/\lambda$, where $\alpha=Q/S\Delta T$ is the coefficient of heat exchange, $Q$ is the amount of heat radiated (or received) by the surface of the body in unit time, $\Delta T>0$ is the difference between the temperature of the surface of the body and that of the gas (fluid) outside the boundary layer, $S$ is the area of the surface, $l$ is the characteristic length, and $\lambda$ is the coefficient of heat conductivity of the gas (fluid). |
It is named after W. Nusselt. | It is named after W. Nusselt. | ||
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====References==== | ====References==== | ||
| − | <table><TR><TD valign="top">[a1]</TD> <TD valign="top"> E.U. Condon, | + | <table> |
| + | <TR><TD valign="top">[a1]</TD> <TD valign="top"> E.U. Condon, "Heat transfer" E.U. Condon (ed.) H. Odishaw (ed.), ''Handbook of Physics'', McGraw-Hill (1967) pp. §5.5.7–5.5.8</TD></TR> | ||
| + | <TR><TD valign="top">[a2]</TD> <TD valign="top"> E.R.G. Eckert, "Introduction to the transfer of heat and mass", McGraw-Hill (1950)</TD></TR> | ||
| + | </table> | ||
Latest revision as of 15:07, 10 April 2023
A dimension-less parameter characterizing the intensity of convective heat exchange between the surface of a body and the flow of a gas (fluid): $\mathrm{Nu}=\alpha l/\lambda$, where $\alpha=Q/S\Delta T$ is the coefficient of heat exchange, $Q$ is the amount of heat radiated (or received) by the surface of the body in unit time, $\Delta T>0$ is the difference between the temperature of the surface of the body and that of the gas (fluid) outside the boundary layer, $S$ is the area of the surface, $l$ is the characteristic length, and $\lambda$ is the coefficient of heat conductivity of the gas (fluid).
It is named after W. Nusselt.
References
| [a1] | E.U. Condon, "Heat transfer" E.U. Condon (ed.) H. Odishaw (ed.), Handbook of Physics, McGraw-Hill (1967) pp. §5.5.7–5.5.8 |
| [a2] | E.R.G. Eckert, "Introduction to the transfer of heat and mass", McGraw-Hill (1950) |
How to Cite This Entry:
Nusselt number. Encyclopedia of Mathematics. URL: http://encyclopediaofmath.org/index.php?title=Nusselt_number&oldid=32887
Nusselt number. Encyclopedia of Mathematics. URL: http://encyclopediaofmath.org/index.php?title=Nusselt_number&oldid=32887
This article was adapted from an original article by BSE-3 (originator), which appeared in Encyclopedia of Mathematics - ISBN 1402006098. See original article