calc_Pr¶

pychemengg.heattransfer.heatcommonmethods.calc_Pr(viscosity=None, specificheat=None, thermalconductivity=None)[source]¶

To compute Prandtl number for a fluid.

Parameters

viscosityint or float: Viscosity of fluid.
specificheatint or float: Specific heat of fluid.
thermalconductivityint or float: Thermal conductivity of fluid.

Returns

Prandtl numberint or float: Prandtl number for a fluid.

Notes

The following formula is used:

\[Pr = \frac {\mu C_p} {k}\]

where:

\(\mu\) = viscosity of fluid

\(C_p\) = specific heat

k = thermal conductivity

References

[1] G. F. Nellis and S. A. Klein, “Introduction to Engineering Heat Transfer”, 1st Edition. Cambridge University Press, 2021.

[2] Y. A. Cengel and A. J. Ghajar, “Heat And Mass Transfer Fundamentals and Applications”, 6th Edition. New York, McGraw Hill Education, 2020.

[3] T.L. Bergman, A. S. Lavine, F. P. Incropera, D. P. Dewitt, “Fundamentals of Heat and Mass Transfer”, 7th Edition, John Wiley, 2011.

Examples

First import the module heatcommonmethods.

>>> from pychemengg.heattransfer import heatcommonmethods as hcm 
>>> hcm.calc_Pr(viscosity=0.8374, specificheat=1880, thermalconductivity=0.145)
10857.324137931037