Experimental and numerical investigations of water jets
| Autor: | Reinhard Prenner, Freddy Florez, Norbert Krouzecky |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
business.industry
Turbulence Strong interaction 02 engineering and technology Mechanics Computational fluid dynamics Breakup Physics::Fluid Dynamics 020303 mechanical engineering & transports 0203 mechanical engineering Stage (hydrology) Air entrainment business Reynolds-averaged Navier–Stokes equations Physics::Atmospheric and Oceanic Physics Geology Large eddy simulation |
| Zdroj: | Materials Today: Proceedings. 5:26544-26550 |
| ISSN: | 2214-7853 |
| DOI: | 10.1016/j.matpr.2018.08.114 |
| Popis: | The determination of air entrainment in free falling water jets is still a topic subject to large uncertainties that eddy-viscosity model. The RANS turbulence model did not generate water separation from the water surface. However, the LES model was able to reproduce the strong dynamic interaction between the air-water phases and come from the strong interaction among independent parameters. Despite many findings on this topic about the determination of the water jet breakup length, a mathematical generalization has not been found yet and the hydraulic physical modelling of air-water faces limitations because of scale effects. As a consequence, a spray mode of disintegration of an experimental test was used to validate the results using computational fluid dynamics by means of two different turbulent approaches: 1) Reynolds Average Navier-Stokes RANS method, with the standard k-e model, and 2) Large Eddy Simulation LES, with the one-equationthe breakup processes, but at an early stage. |
| Databáze: | OpenAIRE |
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