A Lagrange-euler Modelling of Thermovibrational Instabilities in Supercritical Fluids

Abstract eng:
A numerical modelling of thermo-vibrational instabilities in supercritical fluids is performed under zero-gravity conditions. The model is based on a new formulation where the density is calculated from the continuity equation (mass conservation is achieved at a machine precision). The numerical results are compared with experimental data in zero-gravity conditions based on magnetic compensation field (levitation). They show excellent agreement. Stability diagrams will be shown as a flinction of different given parameters (amplitude, frequency, heating rate, proximity to the critical point).

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