Design and Validation of a Lattice Boltzmann Method with Real Properties for Single-Bubble Boiling Simulation

Abstract

[Abstract] This work reports a phase-field LBM model specifically designed to operate with real physical properties. The LBM will be applied to study the boiling phenomena involved in single bubbles’ life-cycle of saturated HFE7100. Previous references on LBM with physical properties are scarce and, therefore, conducting a rigorous assessment of the method becomes of utmost importance. The model was first confronted to the Stefan problem, and numerical results match with outstanding accuracy with the analytical solution. This research goes on with a benchmark-exercise on experimental single-bubble-growth in saturated HFE7100 at 195 kPa and 5.1 K of superheating. Experiments with 19 bubbles yielded the most plausible shape, equivalent radius, apparent contact angle, dry radius, and forces acting on the typical bubble. Numerical results are reported in the proper manner to compare with all previously mentioned experimental features. This kind of comparison can be hardly found in the open literature, even though it potentially identify the physical mechanism responsible for any eventual numerical failure. The proposed LBM model reproduced the experimental data with great precision. This research will show that numerical results matched the experimental data within the uncertainty reported for almost the entire bubble life-cycle period.