High aspect ratio jets are significant in many industrial settings and can be crucial to safety and performance. As more of these flows are being modelled it is therefore essential that the behaviour of these jets is understood and if necessary modelled correctly. Failure to do so could result in jeopardising human life and have considerable environmental implications. Upon an offshore superstructure there exists many high pressure pipelines carrying hydrocarbons often at high temperature. Much safety work before the commissioning of offshore superstructures is done numerically and it is therefore of vital importance to have confidence in the assumptions and models used. This paper concentrates on the numerical modelling of the release of gas at high pressures into the atmosphere and is based on existing experimental work. Initial numerical work with the k-ε two-equation turbulence model was undertaken to compare against this existing experimental data. In revisiting the use of the standard k-ε turbulence model with an elliptical solver replacing the parabolic used in the past for a complex flow and validating it against experimental data could have implications for the CFD modelling of complex flows.

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