Welcome to Fluids’s documentation!¶
Fluids is open-source software for engineers and technicians working in the fields of chemical, mechanical, or civil engineering. It includes modules for piping, fittings, pumps, tanks, compressible flow, open-channel flow, atmospheric properties, solar properties, particle size distributions, two phase flow, friction factors, control valves, orifice plates and other flow meters, ejectors, relief valves, and more.
Module Contents:
Tutorial
API
- Atmospheric properties (fluids.atmosphere)
- Compressible flow and compressor sizing (fluids.compressible)
- Control valve sizing and rating (fluids.control_valve)
- Dimensionless numbers (fluids.core)
- Drag and terminal velocity (fluids.drag)
- Filter pressure drop (fluids.filters)
- Fittings pressure drop (fluids.fittings)
- Orifice plates, flow nozzles, Venturi tubes, cone and wedge meters (fluids.flow_meter)
- Friction factor and pipe roughness (fluids.friction)
- Tank and Heat Exchanger Design (fluids.geometry)
- Jet Pump (ejector/eductor) Sizing and Rating (fluids.jet_pump)
- Mixing (fluids.mixing)
- Support for Numba (fluids.numba)
- Hydrology, weirs and open flow (fluids.open_flow)
- Packed bed pressure drop (fluids.packed_bed)
- Packing & demister pressure drop (fluids.packed_tower)
- Particle Size Distributions (fluids.particle_size_distribution)
- Pipe schedules (fluids.piping)
- Pump and motor sizing (fluids.pump)
- Safety/relief valve sizing (fluids.safety_valve)
- Liquid-Vapor Separators (fluids.separator)
- Pneumatic conveying (fluids.saltation)
- Two phase flow (fluids.two_phase)
- Two-phase flow voidage (fluids.two_phase_voidage)
- Support for pint Quantities (fluids.units)
- Support for NumPy arrays (fluids.vectorized)
Additional Resources
Installation¶
Get the latest version of fluids from https://pypi.python.org/pypi/fluids/
If you have an installation of Python with pip, simple install it with:
$ pip install fluids
Alternatively, if you are using conda as your package management, you can simply install fluids in your environment from conda-forge channel with:
$ conda install -c conda-forge fluids
To get the git version, run:
$ git clone git://github.com/CalebBell/fluids.git
Latest source code¶
The latest development version of Fluids’s sources can be obtained at
Bug reports¶
To report bugs, please use the Fluids’s Bug Tracker at:
If you have further questions about the usage of the library, feel free to contact the author at Caleb.Andrew.Bell@gmail.com.
License information¶
Fluids is MIT licensed. See LICENSE.txt for full information
on the terms & conditions for usage of this software, and a
DISCLAIMER OF ALL WARRANTIES.
Although not required by the fluids license, if it is convenient for you, please cite fluids if used in your work. Please also consider contributing any changes you make back, such that they may be incorporated into the main library and all of us will benefit from them.
Compliance information¶
The author testifies that this software is not subject to the US EAR. The country of origin of this software is Canada. The author also confirms confirm that this software is not developed by, contain components developed by, or receive substantial influence from entities prohibited by Section 889 of the 2019 NDAA.
Citation¶
To cite fluids in publications use:
Caleb Bell and Contributors (2016-2025). fluids: Fluid dynamics component of Chemical Engineering Design Library (ChEDL)
https://github.com/CalebBell/fluids.