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LIBRIS Formathandbok  (Information om MARC21)
00004682nam a22006373a 4500
008180105s2011 sw |||| o |||| ||eng c
024a uri
024a urn:nbn:se:ltu:diva-285802 urn
024a 26a52819-1bc0-4917-8c3c-6fea8e4971f0
040 a S
041a eng
042 9 EPLK
100a Jonsson, Patrick4 aut
111a International Conference on Particle-Based Methods : fundamentals and applications 26/10/2011 - 28/10/2011
2451 0a Smoothed particle hydrodynamics modeling of hydraulic jumpsh [Elektronisk resurs]
260 a Barcelonab International Center for Numerical Methods in Engineering (CIMNE)c 2011
500 a 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)
506a gratis
520 a 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.
650 7a Engineering and Technology2 hsv
650 7a Mechanical Engineering2 hsv
650 7a Fluid Mechanics and Acoustics2 hsv
650 7a Teknik och teknologier2 hsv
650 7a Maskinteknik2 hsv
650 7a Strömningsmekanik och akustik2 hsv
650 7a Engineering and Technology2 hsv
650 7a Mechanical Engineering2 hsv
650 7a Applied Mechanics2 hsv
650 7a Teknik och teknologier2 hsv
650 7a Maskinteknik2 hsv
650 7a Teknisk mekanik2 hsv
650 7a Strömningslära2 ltu
650 7a Fluid Mechanics2 ltu
650 7a Hållfasthetslära2 ltu
650 7a Solid Mechanics2 ltu
653 0a Engineering mechanics - Fluid mechanics
653 0a hydraulic jump
653 0a smoothed particle hydrodynamics
653 0a sph
653 0a particle study
653 0a Teknisk mekanik - Strömningsmekanik
700a Jonsén, Pär4 aut
700a Andreasson, Patrik4 aut
700a Lundström, T. Staffan4 aut
700a Hellström, J. Gunnar I.4 aut
7101 2a Luleå tekniska universitetb Institutionen för teknikvetenskap och matematik4 pbl
7101 2a Luleå tekniska universitetb Institutionen för teknikvetenskap och matematik4 pbl
7721 8i channel recordw 19941651
7730 8i Värdpublikationt Particle-based Methods – Fundamentals and Applicationsg 490-501
7870 8i Värdpublikation i annat formatt Particle-based Methods – Fundamentals and Applicationsz 9788489925670
8564 0u
8564 0u
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