Injection of supercritical fluids: simulations, diagnostics and experiments – INSIDE

The first scientific challenge of the project INSIDE is the development of advanced diagnostics able to deliver quantitative measurements such as the flow displacement and the density field under very high-pressure conditions.
Double-pulse femtosecond laser (DPFL) coupled to a double frame (PIV) camera and Spontaneous Raman Spectroscopy are innovative techniques that will be used for delivering quantitative data. They will be applied for the first time to the coaxial injection of ethane into nitrogen at sub- and super-critical pressures in the project INSIDE.
The second scientific challenge of the project INSIDE is then the development of an advanced numerical tool for DNS/LES able to simulate the injection of a fluid at supercritical pressures with coexistence of subcritical multi-component two-phase states.

Work in progress.

Not applicable yet.

Not applicable yet.

In the project INSIDE the impact of phase behaviour on mixing will be studied through experiments and numerical simulations. High-pressure experiments will be performed with a coaxial injector of ethane surrounded by nitrogen, and experimental data will be provided for flow displacement and density field. To achieve this objective, two innovative optical diagnostics will be specifically developed based on double-pulse femtosecond laser allowing Spontaneous Raman Spectroscopy. Numerical simulations will complete the experimental observations. In this context, the second gradient theory for modelling the diffuse interfaces will be assessed by direct numerical simulation, and subsequent modelling for large-eddy simulation will be proposed. Finally, a comparison with the INSIDE experimental database will be performed.