A numerical study of liquid atomization regimes by means of conservative level-set simulations
| Autor: | Eugenio Schillaci, Assensi Oliva, Oscar Antepara, Néstor Balcázar, Joaquim Rigola Serrano |
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| Přispěvatelé: | Universitat Politècnica de Catalunya. Departament de Màquines i Motors Tèrmics, Universitat Politècnica de Catalunya. CTTC - Centre Tecnològic de la Transferència de Calor |
| Rok vydání: | 2019 |
| Předmět: |
Work (thermodynamics)
Conservative level-set General Computer Science Computer science Direct numerical simulation Context (language use) Computational fluid dynamics 01 natural sciences 010305 fluids & plasmas Level set Two-phase liquid injection 0103 physical sciences 0101 mathematics Atomització Series (mathematics) Adaptive mesh refinement General Engineering Dinàmica de fluids computacional Function (mathematics) Mechanics Solver Atomization 010101 applied mathematics Instability and break-up phenomena Enginyeria mecànica::Mecànica de fluids [Àrees temàtiques de la UPC] |
| Zdroj: | Recercat. Dipósit de la Recerca de Catalunya instname UPCommons. Portal del coneixement obert de la UPC Universitat Politècnica de Catalunya (UPC) |
| ISSN: | 0045-7930 |
| DOI: | 10.1016/j.compfluid.2018.10.017 |
| Popis: | In this work, a conservative level-set finite-volume solver for interface-capturing is employed to perform the direct numerical simulation of Liquid Jets discharging into a quiescent air chamber. The scope is to propose a complete break-up regimes map entirely obtained from numerical simulations. The solver accounts for an adaptive mesh refinement strategy to optimize the computational resources. The numerical model is firstly validated in the context of 3D atomization by simulating the behavior of 3D Coaxial Liquid-Air Jets. Next, we propose an overview of the physical behavior of Liquid Jets, mainly proceeding from theoretical and experimental works. Hence, we perform a series of simulations aimed at studying the variability of the Liquid Jet characteristics as function of selected input parameters. In particular, the analyzed cases are characterized by variable values of Reynolds, Ohnesorge and Weber numbers. The patterns obtained in simulations are compared to the ones expected from bibliographic studies, situating each case on a break-up regime map. A general good agreement is found in the identification of the various break-up regimes and characteristic lengths, while the major differences have been highlighted and interpreted. |
| Databáze: | OpenAIRE |
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