# flowtube Package
A Python package for transport and diffusion calculations in cylindrical flow reactors using the KPS method published in
Knopf et al., Anal. Chem., 2015. The package is currently designed for coated wall reactor (CWR) analysis with plans to
support aerosol flow reactors in future versions.
Author: Corey Pedersen
## Features
Flow Calculations: Flow rates, velocities, residence times, and Reynolds numbers
Transport Properties: Dynamic viscosity and density
Diffusion Analysis: Binary diffusion coefficients, Péclet numbers, and mixing parameters
Uptake Modeling: Diffusion correction factors and uptake coefficient calculations
Support for Inserts: Handles coated cylindrical inserts within flow tubes
## Scientific Applications
This package is designed for atmospheric chemistry and aerosol research, particularly for:
- Heterogeneous reaction kinetics studies
- Uptake coefficient measurements
- Flow reactor design and optimization
- Transport phenomena analysis in laminar flow systems
## Installation
```bash
pip install flowtube
```
## Acronyms
`sccm = standard cubic centimeter per minute` <br>
`FT = flow tube` <br>
`FR = flow rate` <br>
`MR = mixing ratio` <br>
`CWR = coated wall reactor` <br>
## Assumptions
KPS method assumptions (Knopf et al., 2015):
1. The interacting gas species is a trace gas in the bulk flow
2. Laminar flow is established in the flow reactor
3. The gas temperature and viscosity are homogeneous
4. The axial diffusion velocity is negligible compared to bulk flow velocity
5. The amount of gas species taken up is small compared to its reservoir
6. There is an absence of gas-phase reactions impacting gas species concentration
## Bibliography
Knopf, D.A., Pöschl, U., Shiraiwa, M., 2015. Radial Diffusion and Penetration of Gas Molecules and Aerosol Particles
through Laminar Flow Reactors, Denuders, and Sampling Tubes. Anal. Chem. 87, 3746–3754.
https://doi.org/10.1021/ac5042395
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"description": "# flowtube Package\n\nA Python package for transport and diffusion calculations in cylindrical flow reactors using the KPS method published in\nKnopf et al., Anal. Chem., 2015. The package is currently designed for coated wall reactor (CWR) analysis with plans to\nsupport aerosol flow reactors in future versions.\n\nAuthor: Corey Pedersen\n\n## Features\nFlow Calculations: Flow rates, velocities, residence times, and Reynolds numbers\n\nTransport Properties: Dynamic viscosity and density\n\nDiffusion Analysis: Binary diffusion coefficients, P\u00e9clet numbers, and mixing parameters\n\nUptake Modeling: Diffusion correction factors and uptake coefficient calculations\n\nSupport for Inserts: Handles coated cylindrical inserts within flow tubes\n\n## Scientific Applications\nThis package is designed for atmospheric chemistry and aerosol research, particularly for:\n- Heterogeneous reaction kinetics studies\n- Uptake coefficient measurements\n- Flow reactor design and optimization\n- Transport phenomena analysis in laminar flow systems\n\n## Installation\n\n```bash\npip install flowtube\n```\n\n## Acronyms\n`sccm = standard cubic centimeter per minute` <br>\n`FT = flow tube` <br>\n`FR = flow rate` <br>\n`MR = mixing ratio` <br>\n`CWR = coated wall reactor` <br>\n\n## Assumptions\nKPS method assumptions (Knopf et al., 2015):\n1. The interacting gas species is a trace gas in the bulk flow\n2. Laminar flow is established in the flow reactor\n3. The gas temperature and viscosity are homogeneous\n4. The axial diffusion velocity is negligible compared to bulk flow velocity\n5. The amount of gas species taken up is small compared to its reservoir\n6. There is an absence of gas-phase reactions impacting gas species concentration\n\n## Bibliography\nKnopf, D.A., P\u00f6schl, U., Shiraiwa, M., 2015. Radial Diffusion and Penetration of Gas Molecules and Aerosol Particles \nthrough Laminar Flow Reactors, Denuders, and Sampling Tubes. Anal. Chem. 87, 3746\u20133754. \nhttps://doi.org/10.1021/ac5042395\n",
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