Pool boiling simulation with two-fluid and grid resolved wall boiling model. (November 2021)

• Record Type: Journal Article
• Authors: Petrovic, Milan M.; Stevanovic, Vladimir D.
• Is Part Of: International journal of multiphase flow. Volume 144(2021)
• Publication Date: 2021-11
• Subjects: Nucleate pool boiling -- Numerical simulation -- Eulerian modelling -- Wall boiling model; GRWBM grid resolved wall boiling model -- SWBM subgrid wall boiling model; Multiphase flow -- Periodicals; Écoulement polyphasique -- Périodiques; Multiphase flow; Periodicals; 620.1064
• DOI: 10.1016/j.ijmultiphaseflow.2021.103806
• Languages: English
• ISSNs: 0301-9322

Abstract

Highlights: Grid resolved wall boiling model (GRWBM) is developed and applied to pool boiling. GRWBM is validated for detailed experimental data. GRWBM predicts pool boiling dynamics better than the subgrid wall boiling model. Abstract: The standard computational fluid dynamics (CFD) approach to nucleate boiling simulation is based on the Eulerian modelling and the subgrid wall boiling model (SWBM). The liquid and vapour phase are treated as interpenetrating media and considered mechanisms of heat transfer on the heated wall are not spatially resolved. Such an approach does not distinguish locations of bubble growth from the remaining surface of convective heat transfer. The present paper introduces the grid resolved wall boiling model (GRWBM) in the Eulerian simulation of nucleate boiling. This approach distinguishes locations of bubble growth from the remaining surface of conjugate heat transfer from the heated wall to liquid. The new approach is validated against detailed experimental data on nucleate pool boiling from the literature. GRWBM and SWBM simulation results are compared to each other. The simulation with the GRWBM predicts fairly well the wall temperature transient at the footprint of bubble growth, the mean wall superheating, the void change along the pool height and the two-phase mixture swell level. The SWBM does not predict adequately dynamics of the wall temperature transient and the void fraction distribution in the boiling pool, especially under high heat fluxes.