A Chemical Engineer’s Notebook
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All (32)
air quality (4)
atmotube (2)
blowdown (2)
bowling (1)
building infiltration (3)
chemical releases (3)
coffee (2)
compressible flow (7)
dispersion modelling (14)
dynamical systems (1)
elections (1)
equations of state (2)
explosions (1)
hazard screening (5)
hydrogen (3)
integral plume models (1)
julia (28)
mass transfer (2)
plastic (1)
pollen (1)
pressure relief (2)
python (3)
turbulent jets (3)

The Ooms Plume Model

An integral plume model for buoyant plumes.

Jun 15, 2025
Allan Farrell
38 min

Logging data from an Atmotube PRO over Bluetooth

Having fun with data logging.

May 19, 2025
Allan Farrell
15 min

Mapping Pollen Dispersion

Calculating how far the wind blows.

May 10, 2025
Allan Farrell
26 min

Vessel Blowdown - Real Gases

Modelling vessel blowdowns using equations of state.

Mar 19, 2025
Allan Farrell
29 min

Vessel Blowdown - Ideal Gases

Evaluating approaches to ideal gas blowdowns.

Jan 24, 2025
Allan Farrell
25 min

Relief Valve Sizing with Real Gases

Compressible orifice flow calculations using equations of state.

Oct 28, 2024
Allan Farrell
20 min

Modelling Hydrogen Releases Using HyRAM+

Hydrogen plume modelling and indoor accumulation.

Sep 22, 2024
Allan Farrell
14 min

Plastics Recycling and Microplastics

Is plastic recycling a huge source of microplastics?

Jul 14, 2024
Allan Farrell
9 min

Engineering a Cup of Coffee Part Two: Espresso

Modelling espresso bed extraction.

Mar 23, 2024
Allan Farrell
44 min

Estimating the impact of fugitive emissions

Evaluating the zero emissions fuel.

Jan 3, 2024
Allan Farrell
19 min

Impossible bowling

Looking for impossible bowling games.

Nov 26, 2023
Allan Farrell
13 min

Messing around with model parameters

The importance of choosing the right references.

Oct 30, 2023
Allan Farrell
8 min

Engineering a Cup of Coffee

Better coffee through chemical engineering.

Sep 15, 2023
Allan Farrell
24 min

Monitoring smoke infiltration

Better indoor air quality through data.

May 22, 2023
Allan Farrell
9 min

Taking a second look at the Britter-McQuaid model

Re-evaluating plume extents and determining the explosive mass

Mar 12, 2023
Allan Farrell
16 min

Integrating a Gaussian puff - mistakes were made

Successive approximations to … an integrated gaussian puff model.

Jan 15, 2023
Allan Farrell
10 min

Dynamic Mode Decomposition

Dynamic mode decomposition of fluid flow problems.

Dec 18, 2022
Allan Farrell
17 min

Hydrogen Blending

Blending hydrogen into natural gas.

Nov 10, 2022
Allan Farrell
15 min

Adiabatic Compressible Flow in a Pipe

Evaluating different models of adiabatic pipe flow.

Sep 23, 2022
Allan Farrell
17 min

Between a puff and a plume

An integrated Gaussian puff model

Jun 10, 2022
Allan Farrell
9 min

More on Turbulent Jets

Calculating concentrations, temperatures, and flow rates.

May 8, 2022
Allan Farrell
19 min

Turbulent Jets

Notes on turbulent jets and velocity profiles.

Apr 8, 2022
Allan Farrell
24 min

The 2021 Canadian Federal Election

An analysis of how exceptionally little changed.

Sep 22, 2021
Allan Farrell
4 min

Smoke Days

Frequency of forest fire smoke events.

Jul 18, 2021
Allan Farrell
6 min

Building Infiltration Example – Chlorine Release

Single zone building infiltration model with an instantaneous release

Jun 19, 2021
Allan Farrell
21 min

Building Infiltration Example

Single zone building infiltration of forest fire smoke.

May 22, 2021
Allan Farrell
16 min

Turbulent Jet Example - Acetylene Leak

Estimating the explosive mass.

Apr 10, 2021
Allan Farrell
7 min

VCE Example - Butane Vapour Cloud

Using the Baker-Strehlow-Tang model for a vapour cloud explosion.

Jan 9, 2021
Allan Farrell
22 min

Worst Case Meterological Conditions

The worst case weather conditions for air dispersion modeling.

Dec 12, 2020
Allan Farrell
12 min

Air Dispersion Example - Gaussian Dispersion Model of Stack Emissions

Estimating the airborne quantity.

Dec 5, 2020
Allan Farrell
18 min

Compressible Flow Example - Sizing a Goose Neck Vent

Calculating the minimum diameter in incompressible, isothermal, and adiabatic flow situations.

Nov 28, 2020
Allan Farrell
16 min

Chemical Release Screening Example - Butane leak

Estimating the airborne quantity.

Nov 20, 2020
Allan Farrell
20 min
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