Smoothed particle hydrodynamics modeling of hydraulic jumps [Elektronisk resurs]

• BarcelonaInternational Center for Numerical Methods in Engineering (CIMNE)2011

• LIBRIS-ID:22200443
• http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-28580uri
• urn:nbn:se:ltu:diva-28580urn
• 26a52819-1bc0-4917-8c3c-6fea8e4971f0

• Språk:engelska

• deldatabas:Eplk_tEPLK

• Godkänd; 2011; Bibliografisk uppgift: II International Conference on Particle-based Methods – Fundamentals and Applications PARTICLES 2011 E. Oñate and D.R.J. Owen (Eds); 20111212 (ysko)
• gratis
• This study focus on Smoothed Particle Hydrodynamics (SPH) modeling of twodimensional hydraulic jumps in horizontal open channel flows. Insights to the complex dynamics of hydraulic jumps in a generalized test case serves as a knowledgebase for real world applications such as spillway channel flows in hydropower systems. In spillways, the strong energy dissipative mechanism associated with hydraulic jumps is a utilized feature to reduce negative effects of erosion to spillway channel banks and in the old river bed. The SPH-method with its mesh-free Lagrangian formulation and adaptive nature results in a method that handles extremely large deformations and numerous publications using the SPH-method for free-surface flow computations can be found in the literature. Hence, the main objectives with this work are to explore the SPH-methods capabilities to accurately capture the main features of a hydraulic jump and to investigate the influence of the number of particles that represent the system. The geometrical setup consists of an inlet which discharges to a horizontal plane with an attached weir close to the outlet. To investigate the influence of the number of particles that represents the system, three initial interparticle distances were studied, coarse, mid and fine. For all cases it is shown that the SPH-method accurately captures the main features of a hydraulic jump such as the transition between supercritical- and subcritical flow and the dynamics of the highly turbulent roller and the air entrapment process. The latter was captured even though a single phase was modeled only. Comparison of theoretically derived values and numerical results show good agreement for the coarse and mid cases. However, the fine case show oscillating tendencies which might be due to inherent numerical instabilities of the SPH-method or it might show a more physically correct solution. Further validation with experimental results is needed to clarify these issues.

• Engineering and Technology hsv
• Mechanical Engineering hsv
• Fluid Mechanics and Acoustics hsv
• Teknik och teknologier hsv
• Maskinteknik hsv
• Strömningsmekanik och akustik hsv
• Engineering and Technology hsv
• Mechanical Engineering hsv
• Applied Mechanics hsv
• Teknik och teknologier hsv
• Maskinteknik hsv
• Teknisk mekanik hsv
• Strömningslära ltu
• Fluid Mechanics ltu
• Hållfasthetslära ltu
• Solid Mechanics ltu
• Engineering mechanics - Fluid mechanics
• hydraulic jump
• smoothed particle hydrodynamics
• sph
• particle study
• Teknisk mekanik - Strömningsmekanik

• Jonsén, Pär (författare)
• Andreasson, Patrik (författare)
• Lundström, T. Staffan (författare)
• Hellström, J. Gunnar I. (författare)
• Luleå tekniska universitetInstitutionen för teknikvetenskap och matematik (utgivare)
• Luleå tekniska universitetInstitutionen för teknikvetenskap och matematik (utgivare)

• Del av/supplement till:channel record
• Ingår i:VärdpublikationParticle-based Methods – Fundamentals and Applications490-501
• Värdpublikation i annat formatParticle-based Methods – Fundamentals and Applications9788489925670

• http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-28580
• http://ltu.diva-portal.org/smash/get/diva2:1001780/FULLTEXT01

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