Mass transfer correlations

wigging / chemics

A Python package for chemical engineering

https://chemics.readthedocs.io

MIT License

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Mass transfer correlations #20

Closed jAniceto closed 3 years ago

jAniceto commented 3 years ago

Additions to the dimenssionless_numbers module:

Added dimenssionless numbers related to mass transfer: Peclet, Schmidt, Sherwood
Added helper function to identify the flow regime (laminar, transitional, turbulent) based on the Reynolds number.

Added new module mass_transfer_correlations with:

Wilke-Chang equation to estimate molecular diffusion coefficients (Dm).
Wilson and Geankoplis correlation to estimate the convective mass transfer coefficient (kf).
Edwards and Richardson correlation to estimate the axial dispersion coefficient (Dax).
Funazukuri et al. correlation to estimate the axial dispersion coefficient under supercritical conditions (Dax).

Added tests and docs for all new functions.

wigging commented 3 years ago

Thanks again for contributing. I'll try to give you some feedback by Friday.

wigging commented 3 years ago

The only thing I noticed is for the axial_dispersion_coeff() functio. The Dax needs to be D_{ax} in the docstring.

jAniceto commented 3 years ago

Thanks for the quick feedback and good catch on that. Just fixed it.

wigging commented 3 years ago

Is it D{ax} or D_{ax} with an underscore?

jAniceto commented 3 years ago

Should be with the underscore. Sorry about that. Can't fix it today but I'll correct it tomorrow.

jAniceto commented 3 years ago

Ok. I think it's all good now.

wigging commented 3 years ago

For the mass transfer functions that you added, are some of the functions specific to packed beds? If they only apply to packed beds then please make a note of that in the docstring for the relevant functions.

jAniceto commented 3 years ago

Yeah, for all but the molecular_diffusion_coeff function, the way the equations are written is for packed beds. I just added a note to the docstrings.