Fluid mechanics

Allan Wallace specializes in fluid mechanics and often uses a combination of experimental work, theoretical analysis and numerical modeling.  Avocet is a licensee of the Phoenics CFD code.



Submarine turbine. 1

Melting of product in a shipping container 2

Advanced fan and blading design. 2

Swimming Goggles 3

Wastewater treatment 3

Analysis of an exhaust plume. 4

Factory air pollution. 4

Gross pollutant trap. 5


Submarine turbine

The blades of this variable-pitch turbine for mine countermeasures were designed with techniques based on vortex theory.  The chart is part of the spreadsheet design tool created to predict performance.  The prototype performance was very close to predictions.



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Melting of product in a shipping container

CFD numerical modelling was used to investigate different methods of melting tallow within a shipping container so that it could be pumped out at its destination.



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Advanced fan and blading design

Fundamental momentum theory supported by empirical and experimental techniques is used to design high-performance axial fans. The calculated blade shape parameters were modelled in ProEngineer and rapid prototypes made for design verification.  The product is used in low-noise, high-efficiency air conditioners.



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Swimming Goggles

CFD numerical modelling was used to estimate the drag presented by different goggle designs.



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Wastewater treatment

This is an example of a multi-faceted approach to developments in wastewater treatment.


Numerical simulation


Laboratory/Field testing


Pilot plant testing


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Analysis of an exhaust plume

CFD numerical modelling was used to estimate exhaust gas concentration downwind of an engine.



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Factory air pollution

CFD was used to investigate smoke density in a foundry, and to assess measures to improve air quality.


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Gross pollutant trap




Laboratory testing


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