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All Journal Astonjadro Makara Journal of Technology
Bahsan, Erly
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Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Electrical & Electronics Engineering Engineering Materials Science & Nanotechnology Mechanical Engineering

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Modeling Study of Interaction between Fluid Flow and Pipe Wall Formed in Piping Erosion Phenomenon with SPH Method Suntarto, Rut Puspaningtyas; Sjah, Jessica; Rika, R.R. Dwinanti; Bahsan, Erly
ASTONJADRO Vol. 13 No. 1 (2024): ASTONJADRO
Publisher : Universitas Ibn Khaldun Bogor

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This study observes the interaction between fluid flow and the solid particles using Smoothed Particle Hydrodynamics (SPH) as a numerical approach with DualSPHysics platform and the flow assumed as a laminar flow with Re of 25, 50, and 100. As an approach study of internal piping erosion phenomenon, there are two types of pipes simulated, pipe with smooth wall and rough wall with different geometry and height of roughness. The geometry of roughness simulated are semi – circular ribs, triangular ribs, and rectangular ribs. The evaluated output of this research is the friction coefficient and velocity distribution occurring. In the case of flow through smooth wall, it is found that the increase of Reynolds number causes the decrease of friction coefficient. The next case of flow through rough walls shows that the height and shape of roughness affect the friction coefficient and velocity contour of the flow.
Modeling Soil Lateral Deformation Due to Water Film using Smoothed Particle Hydrodynamics Bahsan, Erly; Soepandji, Budi Susilo; Rahayu, Wiwik; Marthanty, R.R. Dwinanti R.; Ontowirjo, Budianto
Makara Journal of Technology Vol. 28, No. 2
Publisher : UI Scholars Hub

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In geotechnical engineering, large deformation in soil materials is rarely simulated using numerical methods, particularly the finite element method and finite difference method, because they experience difficulties in representing the postfailure soil behavior. As an alternative to these methods, the smoothed particle hydrodynamics (SPH) method has recently been adopted to represent soil behavior. The SPH method is a Lagrangian, mesh-free numerical method in which the materials are modeled as a set of particles. In this method, soil behavior can be represented via the Drucker–Prager elasto–plastic failure criterion. Thus, this method can be used to simulate postfailure soil behavior and large deformation in soil materials. This study attempts to analyze large deformation of soil due to an extremely gentle slope and a thin water layer (referred to as the water film). The model is simulated using a C++ platform called PersianSPH. The results demonstrate that lateral deformation can occur in such a geometry because of the effective stress changes during liquefaction.
Co-Authors Marthanty, R.R. Dwinanti R. Ontowirjo, Budianto Rika, R.R. Dwinanti Sjah, Jessica Soepandji, Budi Susilo Suntarto, Rut Puspaningtyas Wiwik Rahayu