High-fidelity database of supercritical homogeneous isotropic turbulence in the pseudo-boiling region
Abstract Supercritical fluids operate above their critical point and are characterized by strong nonlinearities in the equation of state, highly non-ideal fluid behavior, and a tight coupling between thermodynamics and transport properties. As a result, supercritical fluid flows behave fundamentally...
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| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2025-08-01
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| Series: | Scientific Data |
| Online Access: | https://doi.org/10.1038/s41597-025-05693-3 |
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| Summary: | Abstract Supercritical fluids operate above their critical point and are characterized by strong nonlinearities in the equation of state, highly non-ideal fluid behavior, and a tight coupling between thermodynamics and transport properties. As a result, supercritical fluid flows behave fundamentally different from their low-pressure counterparts. The thermodynamic space of supercritical fluids is commonly divided into two main regions separated by the pseudo-boiling region, where a second-order phase transition occurs. Transcritical flows—those crossing the pseudo-boiling line—undergo substantial variations in thermophysical properties. Additionally, near the pseudo-boiling line, smaller-than-Kolmogorov thermal scales are generated, which are tightly coupled with small velocity scales. The complex two-way interaction between pseudo-boiling phenomena and turbulence remains an open question, both from a fundamental physics perspective and for modeling efforts. In this regard, a database of homogeneous isotropic turbulence under various supercritical thermodynamic conditions in the vicinity of the pseudo-boiling line is presented. The dataset includes instantaneous three-dimensional turbulent flow fields and real-fluid thermophysical quantities, as well as Reynolds- and Favre-averaged data, enabling the study and modeling of transcritical fluid turbulence. |
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| ISSN: | 2052-4463 |