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Studies of Two-Phase Flow at a Chute Aeratorwith Experiments and CFD Modelling
KTH, School of Architecture and the Built Environment (ABE). (Hydraulic and Hydrologic Engineering)ORCID iD: 0000-0001-7631-3503
KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering, Resources, Energy and Infrastructure. (Division of Concrete Structures)ORCID iD: 0000-0002-4242-3824
Ecole Polytechnique Federale de Lausanne (EPFL). (Laboratory of Hydraulic Constructions)
2016 (English)In: Modelling and Simulation in Engineering, ISSN 1687-5591, E-ISSN 1687-5605, article id 4729128Article in journal (Refereed) Published
Abstract [en]

The chute aerator of a spillway is a structure in such a sense that air is, in the intense emulsification, entrained into the highvelocitywater flow. Correctly predicting the air entrainment and two-phase flow pattern at the aerator would contribute to reliablespillway operation. Based on experimental data, 2D numerical simulations are preformed to predict streamwise air concentrationsin the aerated flow, in which a two-fluid model is used. Depending on the air bubble size, relatively good agreement is seen withthe experiments in the air cavity zone. The simulations give rise to higher air concentration downstream of the cavity, which ispresumably due to underestimation of the interfacial forces in the two-fluid model.

Place, publisher, year, edition, pages
2016. article id 4729128
National Category
Water Engineering
Research subject
Civil and Architectural Engineering
Identifiers
URN: urn:nbn:se:kth:diva-258935DOI: 10.1155/2016/4729128OAI: oai:DiVA.org:kth-258935DiVA, id: diva2:1350421
Note

QC 20190917

Available from: 2019-09-11 Created: 2019-09-11 Last updated: 2019-09-17Bibliographically approved

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