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Journal articles on the topic 'SPHysics'

Author: Grafiati

Published: 4 June 2021

Last updated: 18 February 2022

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Weiss, Robert, Andrew James Munoz, Robert A. Dalrymple, Alexis Herault, and Giuseppe Bilotta. "THREE-DIMENSIONAL MODELING OF LONG-WAVE RUNUP: SIMULATION OF TSUNAMI INUNDATION WITH GPU-SPHYSICS." Coastal Engineering Proceedings 1, no. 32 (January 27, 2011): 8. http://dx.doi.org/10.9753/icce.v32.currents.8.

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Tsunamis need to be studied more carefully and quantitatively to fully understand their destructive impact on coastal areas. Numerical modeling provides an accurate and useful method to model tsunami inundations on a coastline. However, models must undergo a detailed verification and validation process to be used as an accurate hazard assessment tool. Using standards and procedures given by NOAA, a new code in hydrodynamic modeling called GPU-SPHysics can be verified and validated for use as a tsunami inundation model. GPU-SPHysics is a meshless, Lagrangian code that utilizes the computing power of the Graphics Processing Unit (GPU) to calculate high resolution hydrodynamic simulations using the equations given by Smooth Particle Hydrodynamics (SPH). GPU-SPHysics has proven to be an accurate tool in modeling complex tsunami inundations, such as the inundation on a conical island, when tested against extensive laboratory data.

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Gu, Shenglong, Liqun Ren, Xing Wang, Hongwei Xie, Yuefei Huang, Jiahua Wei, and Songdong Shao. "SPHysics Simulation of Experimental Spillway Hydraulics." Water 9, no. 12 (December 14, 2017): 973. http://dx.doi.org/10.3390/w9120973.

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NARAYANASWAMY, MUTHUKUMAR. "SPHysics-FUNWAVE hybrid model for coastal wave propagation." Journal of Hydraulic Research 48, extra (2009): 000. http://dx.doi.org/10.3826/jhr.2010.0007.

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Narayanaswamy, Muthukumar, Alejandro Jacobo Cabrera Crespo, Moncho Gómez-Gesteira, and Robert Anthony Dalrymple. "SPHysics-FUNWAVE hybrid model for coastal wave propagation." Journal of Hydraulic Research 48, sup1 (January 1, 2010): 85–93. http://dx.doi.org/10.1080/00221686.2010.9641249.

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Kheirkhahan, Mehran, and Khosrow Hosseini. "Comparison of the μ(I) and HBP models for simulating granular media." International Journal of Modern Physics C 29, no. 07 (July 2018): 1850050. http://dx.doi.org/10.1142/s012918311850050x.

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Application of Lagrangian meshless methods in modeling granular flow has been a major concern for researchers due to their particular nature. For modeling granular movement, it is assumed that the particles are continuous. The SPHysics code is developed for modeling the movement of Newtonian fluids in which the pressure is derived from the state equation. In this study, [Formula: see text] and Herschel–Bulkley–Papanastasiou (HBP) viscoplastic models are implemented in the SPHysics code to analyze the movement of grains induced by the applied stresses. In the first model, the movement of granular particles is based on the characteristics such as inertia and friction coefficient, and in the second model, the movement is related to the non-Newtonian viscoplastic behavior of fluids. The accuracy of the models is evaluated by simulating the experimental benchmarks for granular dam break. The effect of length-to-height ratio on the failure mode of dam break phenomenon is also investigated. The performance of the models is increased by introducing the gate removal speed and also the harmonic mean of the viscosity instead of the viscosity proper to each particle. This study shows that the models could capture the behavior of grains in the static and the dynamic parts of the mass body.

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Karim, Rizgar, and Jowhar Mohammad. "SPH Open Boundary Simulation of Free-Surface Flow Over Ogee-crested Spillway." Tikrit Journal of Engineering Sciences 28, no. 2 (August 2, 2021): 137–51. http://dx.doi.org/10.25130/tjes.28.2.11.

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This study was conducted to compare water surface profiles with standard ogeecrested spillways. Different methods were used, such as (experimental models, numerical models, and design nomographs for the United States Army Corps of Engineers, USACE). In accordance with the USACE specifications, three different models were constructed from rigid foam and then installed in a testing flume. The water surface profile has been recorded for these models with different design heads. For modeling the experimental model configurations, a numerical model based on the smoothed particle hydrodynamics (SPH) technique was used and is developed to simulate the water surface profile of the flow over the ogee-crested spillway. A 2D SPHysics open-source software has been used in this study, using the SPH formulation to model fluid flow, developing the SPH boundary procedure to handle open-boundary simulations, and modifying the open-source SPHysics code for this purpose. The maximum absolute difference between the measured and computed results of the water surface profile for all head ratios of (H/Hd), does not exceed 4.63% at the crest region, the numerical results for the water surface profile showed good agreement with the physical model results. The results obtained experimentally and numerically by SPH are compared with the CFD results in order to be more reassuring from the results. Additional comparisons were made using interpolated data from USACE, Waterways Experiment Station (WES), and design nomographs. The SPH technique is considered very promising and effective for free surface flow applications.

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Gu, Shenglong, Xianpei Zheng, Liqun Ren, Hongwei Xie, Yuefei Huang, Jiahua Wei, and Songdong Shao. "SWE-SPHysics Simulation of Dam Break Flows at South-Gate Gorges Reservoir." Water 9, no. 6 (May 31, 2017): 387. http://dx.doi.org/10.3390/w9060387.

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Gabreil, Eslam, Simon J. Tait, Songdong Shao, and Andrew Nichols. "SPHysics simulation of laboratory shallow free surface turbulent flows over a rough bed." Journal of Hydraulic Research 56, no. 5 (April 6, 2018): 727–47. http://dx.doi.org/10.1080/00221686.2017.1410732.

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Gomez-Gesteira, M., B. D. Rogers, A. J. C. Crespo, R. A. Dalrymple, M. Narayanaswamy, and J. M. Dominguez. "SPHysics – development of a free-surface fluid solver – Part 1: Theory and formulations." Computers & Geosciences 48 (November 2012): 289–99. http://dx.doi.org/10.1016/j.cageo.2012.02.029.

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Gomez-Gesteira, M., A. J. C. Crespo, B. D. Rogers, R. A. Dalrymple, J. M. Dominguez, and A. Barreiro. "SPHysics – development of a free-surface fluid solver – Part 2: Efficiency and test cases." Computers & Geosciences 48 (November 2012): 300–307. http://dx.doi.org/10.1016/j.cageo.2012.02.028.

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Dias, Neylan Leal, Simone de Almeida Delphim Leal, Analice Costacurta Brandi, Messias Meneguette Jr, and Jose Manoel Balthazar. "Modelagem matemática em dinâmica dos fluídos: uma aplicação do método Smoothed-particle Hydrodynamics." Research, Society and Development 9, no. 7 (June 10, 2020): e739975109. http://dx.doi.org/10.33448/rsd-v9i7.5109.

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Nos últimos anos, alguns códigos SPH tornaram-se uma parte inerente do arsenal numérico de laboratórios industriais de pesquisa e desenvolvimento e instituições acadêmicas. A capacidade do SPH lidar com as questões de densidade variável e escoamentos diversos, decorre do fato de sua natureza ser totalmente lagrangiana. A ideia do método é acompanhar o fluido por meio das partículas em movimento, sem qualquer restrição de malha. O objetivo deste trabalho é modelar a dinâmica do fluído presente no fenômeno ruptura de barragens través do Método numérico livre de malhas SPH, além disso comparar os resultados simulados com resultados laborais. Os estudos realizados forneceram subsídios para a modelagem do problema da ruptura de barragem através do software SPHysics (open source), com a metodologia SPH, onde o método se mostrou eficiente na modelagem proposta, o que se torna evidente através da comparação com os resultados laborais, como mostrado nos resultados.

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Fadl-Elmola, Salman A. M., Cristian Moisescu Ciocan, and Ioana Popescu. "Application of Smooth Particle Hydrodynamics to Particular Flow Cases Solved by Saint-Venant Equations." Water 13, no. 12 (June 16, 2021): 1671. http://dx.doi.org/10.3390/w13121671.

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Smoothed particle hydrodynamics (SPH) is a Lagrangian mesh free particle method which has been developed and widely applied to different areas in engineering. Recently, the SPH method has also been used to solve the shallow water equations, resulting in (SPH-SWEs) formulations. With the significant developments made, SPH-SWEs provide an accurate computational tool for solving problems of wave propagation, flood inundation, and wet-dry interfaces. Capabilities of the SPH method to solve Saint-Venant equations have been tested using a SPH-SWE code to simulate different hydraulic test cases. Results were compared to other established and commercial hydraulic modelling packages that use Eulerian approaches. The test cases cover non-uniform steady state profiles, wave propagation, and flood inundation cases. The SPH-SWEs simulations provided results that compared well with other established and commercial hydraulic modeling packages. Nevertheless, SPH-SWEs simulations experienced some drawbacks such as loss of inflow water volume of up to 2%, for 2D flood propagation. Simulations were carried out using an open source solver, named SWE-SPHysics.

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Gabreil, Eslam, Simon Tait, Andy Nichols, and Giulio Dolcetti. "3D SPH Simulation of Dynamic Water Surface and Its Interaction with Underlying Flow Structure for Turbulent Open Channel Flows Over Rough Beds." International Journal of Ocean and Coastal Engineering 01, no. 02 (June 2018): 1840003. http://dx.doi.org/10.1142/s2529807018400031.

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In this study, a fully 3D numerical model based on the Smoothed Particle Hydrodynamics (SPH) approach has been developed to simulate turbulent open channel flows over a fixed rough bed. The model focuses on the study of dynamic free surface behavior as well as its interaction with underlying flow structures near the rough bed. The model is improved from the open source code SPHysics ( http://www.sphysics.org ) by adding more advanced turbulence and rough bed treatment schemes. A modified sub-particle-scale (SPS) eddy viscosity model is proposed to reflect the turbulence transfer mechanisms and a modified drag force equation is included into the momentum equations to account for the existence of roughness elements on the bed as well as on the sidewalls. The computed results of various free surface patterns have been compared with the laboratory measurements of the fluctuating water surface elevations in the streamwise and spanwise directions of a rectangular open-channel flow under a range of flow conditions. The comparison has demonstrated that the proposed 3D SPH model can simulate well the complex free surface flows over a fixed rough bed.

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Chunpu, Wang. "Single well control area splitting method based on reservoir sphysical properties and gas well productivity differences." E3S Web of Conferences 236 (2021): 01010. http://dx.doi.org/10.1051/e3sconf/202123601010.

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The determination of the control area of a single well is the prerequisite for the evaluation of the reserves of a single well. The current calculation methods of the control area of a single well are mainly divided into: experience formula, area balancing method, and the physical model, in order to solve the different limitations of the existing single-well control area splitting method and the problem of large error in use, this paper puts forward a kind of based on gas reservoir physical property and the growth of single well productivity difference algorithm for single well control area is split, according to the results of the split combining static reservoir parameters, using volumetric method for single well and the calculation of reserves of gas reservoir evaluation, further clarify the original and the remaining gas distribution of gas reservoir, for the subsequent reasonable development of the gas reservoir and enhance oil recovery. In this paper, block S of Sulige gas field is taken as an example, and the geological reserve of block is calculated as 354.75×108m3, compared with the basic proven reserves of Block S, 364.84×108m3, the error is 2.61% and the reliability is strong

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Ahmed, Ananna, Abdullah Hil Baki, and Munaz Ahmed Noor. "Wind Force on Tall Structure: An Approach From SPH." IAMURE International Journal of Education 2, no. 1 (March 23, 2012). http://dx.doi.org/10.7718/iamure.ije.v2i1.179.

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Wind pressure calculation for tall building frame has always been an extensive job. Usual methods used to estimate wind load are Wind tunnel test method and Finite Element Method and specifications has been derived. In this research, with a view to eliminating drawbacks of these methods and providing a visual interpretation of wind flow a third method is introduced using Smooth Particle Hydrodynamics (SPH) Approach. A model simulation was performed by a SPH software named SPHysics to calculate the pressure exerted on the structure and to derive a graphical interpretation of flow pattern using Para View. Values of pressure at different elevation of the building that actually occurs when wind with certain velocity flows through a tall building are found. From the data found, height vs. pressure graphs are generated which clearly supports the proportional relationship between these two parameters even with triangular and parabolic variation. Again, velocity vs. pressure graphs are plotted which also justifies inter-relationship of proportionality. This is a qualitative comparison not a quantitative one as there is many limitations regarding technicality, computer capacity, and time. These values may be crosschecked with the values found from conventional methods when more precise and suitable boundary conditions can be used in simulation. In future, with intricate detailing and suitable three dimensional modeling, more accurate value of pressure can be found with wide range of applicability. The authors are expecting derivation of two equations as a function of height and velocity to calculate wind load to use in design if further proceeding is possible. This can offer a significant benefit of simplicity for users and can be beginning a new era of using SPH in structural engineering. Keywords - Wind force, tall structure, Particle Hydrodynamics Approach

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Hosseinkhani, Mehdi Rostami, and Pourya Omidvar. "Smoothed Particle Hydrodynamics for the Rising Pattern of Oil Droplets." Journal of Fluids Engineering 140, no. 8 (April 10, 2018). http://dx.doi.org/10.1115/1.4039517.

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The problem of rising droplets in liquids is important in physics and has had many applications in industries. In the present study, the rising pattern of oil droplets has been examined using the smoothed particle hydrodynamics (SPH), which is a fully Lagrangian meshless method. The open-source SPHysics2D code is developed to two phase by adding the effects of surface tension and an added pressure term to the momentum equation. Several problems of droplet dynamics were simulated, and the performance of the developed code is evaluated. First, the still water–oil tank problem was solved to examine the hydrostatic pressure, especially at the interface, for different density ratios. Then, the rising patterns of an oil droplet of different densities are simulated and the time evolutions of the rising velocity and center of mass are shown. It is shown that the shape and behavior of the droplet rising depend on the balance between viscous, surface tension, and dynamic forces. Afterward, the flow morphologies of multiple droplet rising are shown where the density ratio causes negligible effects on the droplet shape, but it has large effects on the dynamics behavior of rising process.

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