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Transportation is one of the largest sources of greenhouse gas (GHG) emissions and urban pollution, representing approximately 17% of Australia’s GHG emissions [1], and 72% of the carbon monoxide emissions in Melbourne [2]. Air pollution impacts in China have been estimated at 1.3M excess deaths per annum with associated economic costs of $US1.3trillion per annum [3]. Any optimisation of transportation systems, whether by improved efficiency or better dispersion of exhaust fumes, has the potential to result in significant health, economic, comfort and environmental benefits.

A simulation of train emissions in a tunnel. The trains emissions begin at the engine stack, and travel along the length of the train.

Figure 1: Synergetics have experience using computational fluid dynamics (CFD) to model vehicle emissions. This figure shows pathlines and contours coloured by concentration for diesel train emissions in a railway tunnel.
Synergetics has a strong history of transportation works including:

Figure 2: Synergetics have experience investigating and optimising transport equipment. This photo shows the internal configuration of a diesel locomotive heat exchanger unit.
[1] Quarterly Update of Australia’s National Greenhouse Gas Inventory: March 2014, Department of the Environment, Australian Government.

[2] EPA victoria website,, accessed November 2014.

[3] OECD (2014). The cost of air pollution: Health impacts of road transport