Relevant bibliographies by topics / Implicit incompressible smoothed particle hydrodynamics

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  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Implicit incompressible smoothed particle hydrodynamics'

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Published: 4 June 2021
Last updated: 17 February 2022

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Journal articles on the topic "Implicit incompressible smoothed particle hydrodynamics"

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Pan, Wenxiao, Kyungjoo Kim, Mauro Perego, Alexandre M. Tartakovsky, and Michael L. Parks. "Modeling electrokinetic flows by consistent implicit incompressible smoothed particle hydrodynamics." Journal of Computational Physics 334 (April 2017): 125–44. http://dx.doi.org/10.1016/j.jcp.2016.12.042.

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Wang, Xiao-Kun, Xiao-Juan Ban, Ya-Lan Zhang, Si-Nuo Liu, and Peng-Fei Ye. "Surface Tension Model Based on Implicit Incompressible Smoothed Particle Hydrodynamics for Fluid Simulation." Journal of Computer Science and Technology 32, no. 6 (November 2017): 1186–97. http://dx.doi.org/10.1007/s11390-017-1793-0.

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Asai, Mitsuteru, Abdelraheem M. Aly, Yoshimi Sonoda, and Yuzuru Sakai. "A Stabilized Incompressible SPH Method by Relaxing the Density Invariance Condition." Journal of Applied Mathematics 2012 (2012): 1–24. http://dx.doi.org/10.1155/2012/139583.

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A stabilized Incompressible Smoothed Particle Hydrodynamics (ISPH) is proposed to simulate free surface flow problems. In the ISPH, pressure is evaluated by solving pressure Poisson equation using a semi-implicit algorithm based on the projection method. Even if the pressure is evaluated implicitly, the unrealistic pressure fluctuations cannot be eliminated. In order to overcome this problem, there are several improvements. One is small compressibility approach, and the other is introduction of two kinds of pressure Poisson equation related to velocity divergence-free and density invariance conditions, respectively. In this paper, a stabilized formulation, which was originally proposed in the framework of Moving Particle Semi-implicit (MPS) method, is applied to ISPH in order to relax the density invariance condition. This formulation leads to a new pressure Poisson equation with a relaxation coefficient, which can be estimated by a preanalysis calculation. The efficiency of the proposed formulation is tested by a couple of numerical examples of dam-breaking problem, and its effects are discussed by using several resolution models with different particle initial distances. Also, the effect of eddy viscosity is briefly discussed in this paper.
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Tayebi, Ali, and Behzad Ghadiri Dehkordi. "Development of a PISO-SPH method for computing incompressible flows." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 228, no. 3 (May 9, 2013): 481–90. http://dx.doi.org/10.1177/0954406213488280.

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A new algorithm is proposed for solving the time-dependent Navier-Stokes equations in a sequential uncoupled manner. The algorithm, known as PISO (Pressure Implicit with Splitting of Operators) is extended to the Smoothed Particle Hydrodynamics (SPH) context (PISO-SPH). The algorithm consists of one prediction and two correction steps, based on a full Navier-Stokes equation, therefore, a modified Poisson equation is derived which makes the algorithm more stable with less pressure fluctuations. The proposed PISO-SPH method is applied to solve a number of benchmark problems including both unsteady and steady state test cases. Comparing the results with analytical solutions and other numerical methods, it is shown that the proposed method is accurate and straightforward for the simulation of incompressible fluid flows.
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Aly, Abdelraheem Mahmoud, and Mitsuteru ASAI. "ISPH method for double-diffusive natural convection under cross-diffusion effects in an anisotropic porous cavity/annulus." International Journal of Numerical Methods for Heat & Fluid Flow 26, no. 1 (January 4, 2016): 235–68. http://dx.doi.org/10.1108/hff-03-2015-0085.

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Purpose – A study on heat and mass transfer behavior for an anisotropic porous medium embedded in square cavity/annulus is conducted using incompressible smoothed particle hydrodynamics (ISPH) method. In the case of square cavity, the left wall has hot temperature T_h and mass C_h and the right wall have cool temperature T_c and mass C_c and both of the top and bottom walls are adiabatic. While in the case of square annulus, the inner surface wall is considered to have a cool temperature T_c and mass C_c while the outer surface is exposed to a hot temperature T_h and mass C_h. The paper aims to discuss these issues. Design/methodology/approach – The governing partial differential equations are transformed to non-dimensional governing equations and are solved using ISPH method. The results present the influences of the Dufour and Soret effects on the fluid flow and heat and mass transfer. Findings – The effects of various physical parameters such as Darcy parameter, permeability ratio, inclination angle of permeability and Rayleigh numbers on the temperature and concentration profiles together with the local Nusselt and Sherwood numbers are presented graphically. The results from the current ISPH method are well-validated and have favorable comparisons with previously published results and solutions by the finite volume method. Originality/value – A study on heat and mass transfer behavior on an anisotropic porous medium embedded in square cavity/annulus is conducted using Incompressible Smoothed Particle Hydrodynamics (ISPH) method. In the ISPH algorithm, a semi-implicit velocity correction procedure is utilized, and the pressure is implicitly evaluated by solving pressure Poisson equation (PPE). The evaluated pressure has been improved by relaxing the density invariance condition to formulate a modified PPE.
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Ellero, Marco, Mar Serrano, and Pep Español. "Incompressible smoothed particle hydrodynamics." Journal of Computational Physics 226, no. 2 (October 2007): 1731–52. http://dx.doi.org/10.1016/j.jcp.2007.06.019.

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Shao, Songdong. "Incompressible smoothed particle hydrodynamics simulation of multifluid flows." International Journal for Numerical Methods in Fluids 69, no. 11 (August 4, 2011): 1715–35. http://dx.doi.org/10.1002/fld.2660.

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Ramos Ortega, Melissa, Anthony Beaudoin, and Serge Huberson. "Optimized incompressible smoothed particle hydrodynamics methods and validations." International Journal for Numerical Methods in Fluids 92, no. 11 (April 21, 2020): 1528–50. http://dx.doi.org/10.1002/fld.4838.

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Moballa, Burniadi, Ming-Jyh Chern, and Ernest Odhiambo. "Incompressible smoothed particle hydrodynamics modeling of thermal convection." Interaction and multiscale mechanics 6, no. 2 (September 1, 2013): 211–35. http://dx.doi.org/10.12989/imm.2013.6.2.211.

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Liu, Xiaoxing, Koji Morita, and Shuai Zhang. "A pairwise-relaxing incompressible smoothed particle hydrodynamics scheme." Computer Methods in Applied Mechanics and Engineering 348 (May 2019): 297–312. http://dx.doi.org/10.1016/j.cma.2019.01.029.

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Dissertations / Theses on the topic "Implicit incompressible smoothed particle hydrodynamics"

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Shimizu, Yuma. "Enhanced Particle Methods with Highly-Resolved Phase Boundaries for Incompressible Fluid Flow." Kyoto University, 2019. http://hdl.handle.net/2433/244528.

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Eliasson, André, and Pontus Franzén. "Accelerating IISPH : A Parallel GPGPU Solution Using CUDA." Thesis, Blekinge Tekniska Högskola, Institutionen för kreativa teknologier, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-10429.

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Context. Simulating realistic fluid behavior in incompressible fluids for computer graphics has been pioneered with the implicit incompressible smoothed particle hydrodynamics (IISPH) solver. The algorithm converges faster than other incompressible SPH-solvers, but real-time performance (in the perspective of video games, 30 frames per second) is still an issue when the particle count increases. Objectives. This thesis aims at improving the performance of the IISPH-solver by proposing a parallel solution that runs on the GPU using CUDA. The solution should not compromise the physical accuracy of the original solution. Investigated aspects are execution time, memory usage and physical accuracy. Methods. The proposed implementation uses a fine-grained approach where each particle is calculated on a separate thread. It is compared to a sequential and a parallel OpenMP implementation running on the CPU. Results and Conclusions. It is shown that the parallel CUDA solution allow for real-time performance for approximately 19 times the amount of particles than that of the sequential implementation. For approximately 175 000 particles the simulation runs at the constraint of real-time performance, more particles are still considered interactive. The visual result of the proposed implementation deviated slightly from the ones on the CPU.
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Xu, Rui. "An improved incompressible smoothed particle hydrodynamics method and its application in free-surface simulations." Thesis, University of Manchester, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.706080.

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Gartner, Nicolas. "Identification de paramètres hydrodynamiques par simulation avec Smoothed Particle Hydrodynamics." Electronic Thesis or Diss., Toulon, 2020. http://www.theses.fr/2020TOUL0004.

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Cette thèse porte sur les techniques de simulations des interactions dynamiques entre un véhicule sous-marin et l'eau qui l'entoure. L'objectif principal est de proposer une solution satisfaisante pour pouvoir, en amont du processus de conception, tester des algorithmes de contrôle et des formes de coques pour véhicules sous-marins. Il serait alors intéressant de pouvoir simuler en même temps la dynamique du solide et celle du fluide. L'idée développée dans cette thèse est d'utiliser la technique Smoothed Particles Hydrodynamics (SPH), qui est très récente et qui modélise le fluide comme un ensemble de particules sans maillage. Afin de valider les résultats de simulations une première étude a été réalisée avec un balancier hydrodynamique. Cette étude a permis la mise au point d'une méthode innovante d'estimation de paramètre hydrodynamique (forces de frottement et masse ajoutée) qui est plus robuste que les méthodes existantes lorsqu'il est nécessaire d'utiliser des dérivées numériques du signal mesuré. Ensuite, l'utilisation de deux types de solveur SPH : Weakly Compressible SPH et Incompressible SPH, est validée en suivant la démarche de validation proposée dans cette thèse. Sont étudiés, premièrement, le comportement du fluide seul, deuxièmement, un cas hydrostatique, et enfin un cas dynamique. L'utilisation de deux méthodes de modélisation de l'interaction fluide-solide : la méthode de réflexion de la pression et la méthode d'extrapolation est étudiée. La capacité d'atteindre une vitesse limite due aux forces de frottement est démontrée. Les résultats d'estimation des paramètres hydrodynamiques à partir des essais de simulation est finalement discutée. La masse ajoutée simulée du solide s'approche de la réalité, mais les forces de frottement semblent actuellement ne pas correspondre à la réalité. Des pistes d'améliorations pour pallier à ce problème sont proposées
This thesis focuses on techniques that allows the simulation of dynamic interactions between an underwater vehicle and the surrounding water. The main objective is to propose a satisfactory solution to be able to test control algorithms and hull shapes for underwater vehicles upstream of the design process. In those cases, it would be interesting to be able to simulate solid and fluid dynamics at the same time. The idea developed in this thesis is to use the Smoothed Particles Hydrodynamics (SPH) technique, which is very recent, and which models the fluid as a set of particles without mesh. In order to validate the simulation results a first study has been performed with a hydrodynamic pendulum. This study allowed the development of an innovative method for estimating the hydrodynamic parameters (friction forces and added mass) which is more robust than previous existing methods when it is necessary to use numerical derivatives of the measured signal. Then, the use of two types of SPH solver: Weakly Compressible SPH and Incompressible SPH, is validated following the validation approach proposed in this thesis. Firstly, the behaviour of the fluid alone is studied, secondly, a hydrostatic case, and finally a dynamic case. The use of two methods for modelling the fluid-solid interaction: the pressure mirroring method and the extrapolation method is studied. The ability to reach a limit velocity due to friction forces is demonstrated. The results of the hydrodynamic parameters estimation from simulation tests are finally discussed. The simulated added mass of the solid approaches reality, but the friction forces currently seem not to correspond to reality. Possible improvements to overcome this problem are proposed
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Santos, Ricardo Dias dos. "Uma formulação implícita para o método Smoothed Particle Hydrodynamics." Universidade do Estado do Rio de Janeiro, 2014. http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=6751.

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Em uma grande gama de problemas físicos, governados por equações diferenciais, muitas vezes é de interesse obter-se soluções para o regime transiente e, portanto, deve-se empregar técnicas de integração temporal. Uma primeira possibilidade seria a de aplicar-se métodos explícitos, devido à sua simplicidade e eficiência computacional. Entretanto, esses métodos frequentemente são somente condicionalmente estáveis e estão sujeitos a severas restrições na escolha do passo no tempo. Para problemas advectivos, governados por equações hiperbólicas, esta restrição é conhecida como a condição de Courant-Friedrichs-Lewy (CFL). Quando temse a necessidade de obter soluções numéricas para grandes períodos de tempo, ou quando o custo computacional a cada passo é elevado, esta condição torna-se um empecilho. A fim de contornar esta restrição, métodos implícitos, que são geralmente incondicionalmente estáveis, são utilizados. Neste trabalho, foram aplicadas algumas formulações implícitas para a integração temporal no método Smoothed Particle Hydrodynamics (SPH) de modo a possibilitar o uso de maiores incrementos de tempo e uma forte estabilidade no processo de marcha temporal. Devido ao alto custo computacional exigido pela busca das partículas a cada passo no tempo, esta implementação só será viável se forem aplicados algoritmos eficientes para o tipo de estrutura matricial considerada, tais como os métodos do subespaço de Krylov. Portanto, fez-se um estudo para a escolha apropriada dos métodos que mais se adequavam a este problema, sendo os escolhidos os métodos Bi-Conjugate Gradient (BiCG), o Bi-Conjugate Gradient Stabilized (BiCGSTAB) e o Quasi-Minimal Residual (QMR). Alguns problemas testes foram utilizados a fim de validar as soluções numéricas obtidas com a versão implícita do método SPH.
In a wide range of physical problems governed by differential equations, it is often of interest to obtain solutions for the unsteady state and therefore it must be employed temporal integration techniques. One possibility could be the use of an explicit methods due to its simplicity and computational efficiency. However, these methods are often only conditionally stable and are subject to severe restrictions for the time step choice. For advective problems governed by hyperbolic equations, this restriction is known as the Courant-Friedrichs-Lewy (CFL) condition. When there is the need to obtain numerical solutions for long periods of time, or when the computational cost for each time step is high, this condition becomes a handicap. In order to overcome this restriction implicit methods can be used, which are generally unconditionally stable. In this study, some implicit formulations for time integration are used in the Smoothed Particle Hydrodynamics (SPH) method to enable the use of larger time increments and obtain a strong stability in the time evolution process. Due to the high computational cost required by the particles tracking at each time step, the implementation will be feasible only if efficient algorithms were applied for this type of matrix structure such as Krylov subspace methods. Therefore, we carried out a study for the appropriate choice of methods best suited to this problem, and the methods chosen were the Bi-Conjugate Gradient (BiCG), the Bi-Conjugate Gradient Stabilized (BiCGSTAB) and the Quasi-Minimal Residual(QMR). Some test problems were used to validate the numerical solutions obtained with the implicit version of the SPH method.
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Hosein, Falahaty. "Enhanced fully-Lagrangian particle methods for non-linear interaction between incompressible fluid and structure." Kyoto University, 2018. http://hdl.handle.net/2433/235070.

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Bankole, Adeleke Olusegun [Verfasser], and Armin [Akademischer Betreuer] Iske. "A Semi-implicit Smoothed Particle Hydrodynamics Method for the Numerical Simulation of Shallow Water Flows / Adeleke Olusegun Bankole ; Betreuer: Armin Iske." Hamburg : Staats- und Universitätsbibliothek Hamburg, 2017. http://d-nb.info/1130323331/34.

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Freitas, Mayksoel Medeiros de. "Simulação de escoamentos incompressíveis empregando o método Smoothed Particle Hydrodynamics utilizando algoritmos iterativos na determinação do campo de pressões." Universidade do Estado do Rio de Janeiro, 2013. http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=4839.

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Nesse trabalho, foi desenvolvido um simulador numérico (C/C++) para a resolução de escoamentos de fluidos newtonianos incompressíveis, baseado no método de partículas Lagrangiano, livre de malhas, Smoothed Particle Hydrodynamics (SPH). Tradicionalmente, duas estratégias são utilizadas na determinação do campo de pressões de forma a garantir-se a condição de incompressibilidade do fluido. A primeira delas é a formulação chamada Weak Compressible Smoothed Particle Hydrodynamics (WCSPH), onde uma equação de estado para um fluido quase-incompressível é utilizada na determinação do campo de pressões. A segunda, emprega o Método da Projeção e o campo de pressões é obtido mediante a resolução de uma equação de Poisson. No estudo aqui desenvolvido, propõe-se três métodos iterativos, baseados noMétodo da Projeção, para o cálculo do campo de pressões, Incompressible Smoothed Particle Hydrodynamics (ISPH). A fim de validar os métodos iterativos e o código computacional, foram simulados dois problemas unidimensionais: os escoamentos de Couette entre duas placas planas paralelas infinitas e de Poiseuille em um duto infinito e foram usadas condições de contorno do tipo periódicas e partículas fantasmas. Um problema bidimensional, o escoamento no interior de uma cavidade com a parede superior posta em movimento, também foi considerado. Na resolução deste problema foi utilizado o reposicionamento periódico de partículas e partículas fantasmas.
In this work, we have developed a numerical simulator (C/C++) to solve incompressible Newtonian fluid flows, based on the meshfree Lagrangian Smoothed Particle Hydrodynamics (SPH) Method. Traditionally, two methods have been used to determine the pressure field to ensure the incompressibility of the fluid flow. The first is calledWeak Compressible Smoothed Particle Hydrodynamics (WCSPH) Method, in which an equation of state for a quasi-incompressible fluid is used to determine the pressure field. The second employs the Projection Method and the pressure field is obtained by solving a Poissons equation. In the study developed here, we have proposed three iterative methods based on the Projection Method to calculate the pressure field, Incompressible Smoothed Particle Hydrodynamics (ISPH) Method. In order to validate the iterative methods and the computational code we have simulated two one-dimensional problems: the Couette flow between two infinite parallel flat plates and the Poiseuille flow in a infinite duct, and periodic boundary conditions and ghost particles have been used. A two-dimensional problem, the lid-driven cavity flow, has also been considered. In solving this problem we have used a periodic repositioning technique and ghost particles.
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Helbling, Marc. "Sculpture virtuelle par système de particules." Thesis, Rouen, INSA, 2010. http://www.theses.fr/2010ISAM0030/document.

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La 3D s'impose comme un nouveau média dont l'adoption généralisée passe par la conception d'outils, accessibles au grand public, de création et de manipulation de formes tridimensionnelles quelconques. Les outils actuels reposent fortement sur la modélisation sous-jacente des formes, généralement surfacique, et sont alors peu intuitifs ou limitatifs dans l'expressivité offerte à l'utilisateur.Nous souhaitons, dans ces travaux, définir une approche ne présentant pas ces défauts et permettant à l'utilisateur de se concentrer sur le processus créatif. En nous inspirant de l'utilisation séculaire de l'argile, nous proposons une approche modélisant la matière sous forme lagrangienne.Une forme est ainsi décrite par un système de particules, où chaque particule représente un petit volume du volume global.Dans ce cadre lagrangien, la méthode Smoothed Particle Hydrodynamics (SPH) permet l'approximation de grandeurs physiques en tout point de l'espace. Nous proposons alors une modélisation de matériaux à deux couches, l'une décrivant la topologie et l'autre décrivant la géométrie du système global.La méthode SPH permet, entre autres, d'évaluer la densité de matière. Ceci nous permet de définir une surface implicite basée sur les propriétés physiques du système de particules pour redonner un aspect continu à la matière.Ces matériaux peuvent alors être manipulés au moyen d'interactions locales reproduisant le maniement de la pâte à modeler, et de déformations globales. L'intérêt de notre approche est démontrée par plusieurs prototypes fonctionnant sur des stations de travail standard ou dans des environnements immersifs
3D is emerging as a new media. Its widespread adoption requires the implementation of userfriendly tools to create and manipulate three-dimensional shapes. Current softwares heavily rely on underlying shape modeling, usually a surfacic one, and are then often counter-intuitive orlimiting. Our objective is the design of an approach alleviating those limitations and allowing the user to only focus on the process of creating forms. Drawing inspiration from the ancient use of clay,we propose to model a material in a lagrangian description. A shape is described by a particles system, where each particle represents a small fraction of the total volume of the shape. In this framework, the Smoothed Particle Hydrodynamics method enables to approximate physical values anywhere in space. Relying on this method, we propose a modeling of material with two levels, one level representing the topology and the other one describing local geometry of the shape.The SPH method especially enables to evaluate a density of matter. We use this property todefine an implicit surface based on the physical properties of the particles system to reproduce the continuous aspect of matter. Those virtual materials can then be manipulated locally through interactions reproducing the handling of dough in the real world or through global shape deformation. Our approach is demonstrated by several prototypes running either on typical desktop workstation or in immersive environment system
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Rioux-Lavoie, Damien. "Méthode SPH implicite d’ordre 2 appliquée à des fluides incompressibles munis d’une frontière libre." Thèse, 2017. http://hdl.handle.net/1866/19377.

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L’objectif de ce mémoire est d’introduire une nouvelle méthode smoothed particle hydrodynamics (SPH) implicite purement lagrangienne, pour la résolution des équations de Navier- Stokes incompressibles bidimensionnelles en présence d’une surface libre. Notre schéma de discrétisation est basé sur celui de Kéou Noutcheuwa et Owens [19]. Nous avons traité la surface libre en combinant la méthode multiple boundary tangent (MBT) de Yildiz et al. [43] et les conditions aux limites sur les champs auxiliaires de Yang et Prosperetti [42]. Ce faisant, nous obtenons un schéma de discrétisation d’ordre $\mathcal{O}(\Delta t ^2)$ et $\mathcal{O}(\Delta x ^2)$, selon certaines contraintes sur la longueur de lissage $h$. Dans un premier temps, nous avons testé notre schéma avec un écoulement de Poiseuille bidimensionnel à l’aide duquel nous analysons l’erreur de discrétisation de la méthode SPH. Ensuite, nous avons tenté de simuler un problème d’extrusion newtonien bidimensionnel. Malheureusement, bien que le comportement de la surface libre soit satisfaisant, nous avons rencontré des problèmes numériques sur la singularité à la sortie du moule.
The objective of this thesis is to introduce a new implicit purely lagrangian smoothed particle hydrodynamics (SPH) method, for the resolution of the two-dimensional incompressible Navier-Stokes equations in the presence of a free surface. Our discretization scheme is based on that of Kéou Noutcheuwa et Owens [19]. We have treated the free surface by combining Yildiz et al. [43] multiple boundary tangent (MBT) method and boundary conditions on the auxiliary fields of Yang et Prosperetti [42]. In this way, we obtain a discretization scheme of order $\mathcal{O}(\Delta t ^2)$ and $\mathcal{O}(\Delta x ^2)$, according to certain constraints on the smoothing length $h$. First, we tested our scheme with a two-dimensional Poiseuille flow by means of which we analyze the discretization error of the SPH method. Then, we tried to simulate a two-dimensional Newtonian extrusion problem. Unfortunately, although the behavior of the free surface is satisfactory, we have encountered numerical problems on the singularity at the output of the die.
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Book chapters on the topic "Implicit incompressible smoothed particle hydrodynamics"

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Bankole, Adeleke O., Michael Dumbser, Armin Iske, and Thomas Rung. "A Meshfree Semi-implicit Smoothed Particle Hydrodynamics Method for Free Surface Flow." In Meshfree Methods for Partial Differential Equations VIII, 35–52. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-51954-8_3.

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Conference papers on the topic "Implicit incompressible smoothed particle hydrodynamics"

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Zhang, Yuxin, and Decheng Wan. "Comparison Investigations of Numerical Simulations of Incompressible Viscous Flows by SPH and MPS." In ASME 2010 29th International Conference on Ocean, Offshore and Arctic Engineering. ASMEDC, 2010. http://dx.doi.org/10.1115/omae2010-20843.

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Comparison investigations of numerical simulations of incompressible viscous flows by the SPH (smoothed particle hydrodynamics) and the MPS (moving particle semi-implicit) are presented. A dam-break problem is chosen as the test case. In the calculation with the SPH method, weakly compressible model is used, i.e. WCSPH, which describes water as a nearly incompressible fluid, while in MPS method, the pressure Poisson equation is introduced to keep the density of fluid to be constant. The numerical results show that the two particle methods are robust and flexible, numerical results qualitatively agree with the experimental data. It can be seen that both the SPH method and the MPS method can be easily applied to the complex free surface flow problems.
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Lukyanov, A., and C. Vuik. "Parallel Fully Implicit Smoothed Particle Hydrodynamics Based Multiscale Method." In ECMOR XV - 15th European Conference on the Mathematics of Oil Recovery. Netherlands: EAGE Publications BV, 2016. http://dx.doi.org/10.3997/2214-4609.201601748.

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Barcarolo, D. A., D. le Touzé, and F. de Vuyst. "VALIDATION OF A NEW FULLY-EXPLICIT INCOMPRESSIBLE SMOOTHED PARTICLE HYDRODYNAMICS METHOD." In 10th World Congress on Computational Mechanics. São Paulo: Editora Edgard Blücher, 2014. http://dx.doi.org/10.5151/meceng-wccm2012-16774.

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Dong, Tianwen, and Shunliang Jiang. "Comparisions of Mirror and Static Boundary Conditions in Incompressible Smoothed Particle Hydrodynamics." In 2010 International Conference on Computational and Information Sciences (ICCIS). IEEE, 2010. http://dx.doi.org/10.1109/iccis.2010.299.

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FROLOV, S. M., V. S. IVANOV, Vas S. IVANOV, R. R. TUKHVATULLINA, and B. BASARA. "SIMULATION OF COMPRESSIBLE AND INCOMPRESSIBLE FLOWS BY MESHLESS METHODS OF SMOOTHED PARTICLE HYDRODYNAMICS." In 9TH INTERNATIONAL SYMPOSIUM ON NONEQUILIBRIUM PROCESSES, PLASMA, COMBUSTION, AND ATMOSPHERIC PHENOMENA. TORUS PRESS, 2020. http://dx.doi.org/10.30826/nepcap9a-43.

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At present, when solving problems of hydrodynamics of viscous incompressible and compressible flows in conditions of complex geometry with moving elements, preference is often given to meshless numerical algorithms based on the Smoothed Particle Hydrodynamics (SPH). We have developed our own parallel SPH algorithm that uses graphic processors to solve various problems with very narrow slits, rotating and contacting disks, free surfaces, etc., which are difficult to attack by conventional mesh-based (e. g., finite volume (FV)) methods. To check the algorithm, we solved the problems: (i) on the steady-state temperature distribution inside the cylinder head of a piston engine; (ii) on the torque of a gear box with rotating gearwheels partially immersed in engine oil; and (iii) on the steady-state gas velocity field during purging of the piston engine cylinder with air.
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6

Amanifard, N., S. M. Mahnama, S. A. L. Neshaei, and M. A. Mehrdad. "Numerical investigation of sandy beach evolution using an incompressible smoothed particle hydrodynamics method." In COASTAL PROCESSES 2009. Southampton, UK: WIT Press, 2009. http://dx.doi.org/10.2495/cp090061.

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le Touzé, David, Daniel A. Barcarolo, Matthieu Kerhuel, Guillaume Oger, Nicolas Grenier, Nathan Quinlan, Libor Lobovsky, et al. "Smoothed Particle Hydrodynamics: Benchmarking on Selected Test Cases Within the NextMuSE Initiative." In ASME 2013 32nd International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/omae2013-10811.

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In this paper are presented comparisons of SPH variants on academic test cases classically used to validate numerical fluid dynamics software. These comparisons are extracted from NextMuSE FP7 project activities which will be published more extensively in the near future. One of the goals of this project was to better understand the SPH method and to leave the path to its establishment within CFD methods. An important work load was thus dedicated to benchmark SPH variants on selected test cases. A number of results and conclusions of this comparative study are presented in this paper. The studied variants are: standard weekly-compressible SPH, δ-SPH, Riemann-SPH, incompressible SPH, and FVPM. The majority of the test cases also present a reference solution, either experimental or computed using a mesh-based solver. Test cases include: wave propagation, flow past a cylinder, jet impact, floating body, bubble rise, dam break on obstacle, floating body dynamics, etc. Conclusions may help SPH practitioners to choose one variant or another and shall give detailed understanding necessary to derive further improvements of the method.
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Basu, Debashis, Kaushik Das, Ron Janetzke, and Steve Green. "Numerical Simulations of Non-Newtonian Geophysical Flows Using Smoothed Particle Hydrodynamics (SPH) Method: A Rheological Analysis." In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-62501.

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This paper presents computational results for two-dimensional (2-D) simulations of geophysical flows using the Smoothed Particle Hydrodynamics (SPH) method. The basic equations solved are the incompressible mass conservation and Navier-Stokes equations, and the discretization is carried out using the SPH method. The simulations are carried out for two problems. The first problem involved a 2-D dam-break problem with mud flow. The second problem involved non-Newtonian flow of deformable landslide on a mild slope. In both the simulations, the flow is assumed to be incompressible. In the present study, the mud flow materials are represented as non-Newtonian fluids with a Bingham model. The effects of the rheological formulation are assessed for the predicted mudflow shape. The simulation results are compared with the experimental data available in open literature. The velocity profiles and the free surface shape are in good agreement with the experimental data. To distinguish between the non-Newtonian model simulations and the Newtonian model, the dam-break simulations were also carried out using water and Newtonian models. The simulations reveal several distinctive flow features between the Newtonian and non-Newtonian approaches. The results of the simulations are of engineering interest in mitigation of natural hazards such as debris flows.
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Sadek, Samir Hassan, and Mehmet Yildiz. "Numerical Simulation of Die Swell of Second-Order Fluids Using Smoothed Particle Hydrodynamics." In ASME 2010 International Mechanical Engineering Congress and Exposition. ASMEDC, 2010. http://dx.doi.org/10.1115/imece2010-39215.

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This work presents the development of both weakly compressible and incompressible Smoothed Particle Hydrodynamics (SPH) models for simulating two-dimensional transient viscoelastic free surface flow which has extensive applications in polymer processing industries. As an illustration with industrial significance, we have chosen to model the extrudate swell of a second-order polymeric fluid. The extrudate or die swell is a phenomenon that takes place during the extrusion of polymeric fluids. When a polymeric fluid is forced through a die to give a polymer its desired shape, due to its viscoelastic non-Newtonian nature, it shows a tendency to swell or contract at the die exit depending on its rheological parameters. The die swell phenomenon is a typical example of a free surface problem where the free surface is formed at the die exit after the polymeric fluid has been extruded. The swelling process leads to an undesired increase in the dimensions of the extrudate. To be able to obtain a near-net shape product, the flow in the extrusion process should be well-understood to shed some light on the important process parameters behind the swelling phenomenon. To this end, a systematic study has been carried out to compare constitutive models proposed in literature for second-order fluids in terms of their ability to capture the physics behind the swelling phenomenon. The effect of various process and rheological parameters on the die swell such as the extrusion velocity, normal stress coefficients, and Reynolds and Deborah numbers have also been investigated. The models developed here can predict both swelling and contraction of the extrudate successfully. The die swell problem was solved for a wide range of Deborah numbers and for two different Re numbers. The numerical model was validated through the solution of fully developed Newtonian and Non-Newtonian viscoelastic flows in a two-dimensional channel, and the results of these two benchmark problems were compared with analytic solutions, and good agreements were obtained.
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Rafiee, Ashkan, Sharen Cummins, Murray Rudman, and Krish Thiagarajan. "The Effect of Pressure Solution in SPH Simulations of Sloshing Flow." In ASME 2011 30th International Conference on Ocean, Offshore and Arctic Engineering. ASMEDC, 2011. http://dx.doi.org/10.1115/omae2011-49215.

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In modelling incompressible flows using the Smoothed Particle Hydrodynamics method (SPH), an equation of state with a large sound speed is typically used. This weakly compressible approach (WCSPH), results in a stiff set of equations with a noisy pressure field and stability issues at high Reynolds number. As a remedy, an incompressible SPH technique was introduced [1] (ISPH), which uses a pressure projection technique to model incompressibility. In this paper, the incompressible and weakly compressible forms of the SPH method are employed to study sloshing flow. Both methods are compared with experimental data. The results show the incompressible SPH method provides more accurate pressure fields and free-surface profiles when compared to experiment.
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