ISPH modelling of transient natural convection

Danis, Mustafa E.; Orhan, Mehmet; Ecder, Ali

doi:10.1080/10618562.2012.753146

Cited by 41 publications

(15 citation statements)

References 42 publications

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“…They introduced a new variant of the Smoothed Particle Hydrodynamics (SPH) simulations of the natural convection phenomena. Danis et al [26] modeled the transient and laminar natural convection in a square cavity using SPH method with a discretization tool on uniform Eulerian grids.…”

Section: Introductionmentioning

confidence: 99%

Modeling of multi-phase flows and natural convection in a square cavity using an incompressible smoothed particle hydrodynamics

Aly

2015

International Journal of Numerical Methods for Heat &Amp; Fluid Flow

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If you would like to write for this, or any other Emerald publication, then please use our Emerald for Authors service information about how to choose which publication to write for and submission guidelines are available for all. Please visit www.emeraldinsight.com/authors for more information. About Emerald www.emeraldinsight.comEmerald is a global publisher linking research and practice to the benefit of society. The company manages a portfolio of more than 290 journals and over 2,350 books and book series volumes, as well as providing an extensive range of online products and additional customer resources and services.Emerald is both COUNTER 4 and TRANSFER compliant. The organization is a partner of the Committee on Publication Ethics (COPE) and also works with Portico and the LOCKSS initiative for digital archive preservation.

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Section: Introductionmentioning

confidence: 99%

Modeling of multi-phase flows and natural convection in a square cavity using an incompressible smoothed particle hydrodynamics

Aly

2015

International Journal of Numerical Methods for Heat &Amp; Fluid Flow

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“…In addition, should a "weakly compressible" approach be adopted, the non-iterative SPH algorithms are simplified [8].The limits of SPH models are linked to slightly higher computational costs, complex procedures for the local refining of spatial resolution, and a relatively low accuracy for classical CFD applications where mesh-based models are well-validated (e.g., confined mono-phase flows [8]). However, they are effectively employed in several fields [9][10][11][12][13][14][15][16][17][18].Various flood propagation studies have focused on the use of the SPH method to investigate dam-break events [19][20][21][22][23][24][25][26][27][28][29][30][31][32]. Having implemented an SPH scheme to treat a dam-break problem in a two-phase approach, Colagrossi and Landrini [19] discussed the effects of density-ratio variations and air entrapment on loads.…”

mentioning

confidence: 99%

“…The limits of SPH models are linked to slightly higher computational costs, complex procedures for the local refining of spatial resolution, and a relatively low accuracy for classical CFD applications where mesh-based models are well-validated (e.g., confined mono-phase flows [8]). However, they are effectively employed in several fields [9][10][11][12][13][14][15][16][17][18].…”

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confidence: 99%

Smoothed Particle Hydrodynamics Modeling with Advanced Boundary Conditions for Two-Dimensional Dam-Break Floods

Mirauda

Albano

Sole

et al. 2020

Water

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To simulate the dynamics of two-dimensional dam-break flow on a dry horizontal bed, we use a smoothed particle hydrodynamics model implementing two advanced boundary treatment techniques: (i) a semi-analytical approach, based on the computation of volume integrals within the truncated portions of the kernel supports at boundaries and (ii) an extension of the ghost-particle boundary method for mobile boundaries, adapted to free-slip conditions. The trends of the free surface along the channel, and of the impact wave pressures on the downstream vertical wall, were first validated against an experimental case study and then compared with other numerical solutions. The two boundary treatment schemes accurately predicted the overall shape of the primary wave front advancing along the dry bed until its impact with the downstream vertical wall. Compared to data from numerical models in the literature, the present results showed a closer fit to an experimental secondary wave, reflected by the downstream wall and characterized by complex vortex structures. The results showed the reliability of both the proposed boundary condition schemes in resolving violent wave breaking and impact events of a practical dam-break application, producing smooth pressure fields and accurately predicting pressure and water level peaks. compared to 3D CFD (computational fluid dynamics) equations [1,2]. However, given their meshing features, assumptions regarding hydrostatic pressure, and neglect of vertical velocity and flow velocity uniformity along the vertical axis [3,4], traditional numerical solutions to SWEs cannot effectively reproduce the strong distortion of the free surface that occurs in dam-break flows.Mesh-free models, such as smoothed particle hydrodynamics (SPH), offer an alternative to solving SWEs with grid-based numerical methods and have, accordingly, been applied to several areas of computational fluid dynamics [5,6]. The SPH method presents different advantages: mesh deformation and cracking; calculation of the system's advection and transport (due to its Lagrangian nature); modeling of free surface and phase/fluid interface problems; the ability to manage very large deformations in high-energy phenomena (e.g., explosions, high-velocity impacts, and penetrations); applicability at multiple scales if coupled with molecular dynamics and dissipative particle dynamics; and greater suitability to 3D-modeling than mesh-based methods [7,8]. In addition, should a "weakly compressible" approach be adopted, the non-iterative SPH algorithms are simplified [8].The limits of SPH models are linked to slightly higher computational costs, complex procedures for the local refining of spatial resolution, and a relatively low accuracy for classical CFD applications where mesh-based models are well-validated (e.g., confined mono-phase flows [8]). However, they are effectively employed in several fields [9][10][11][12][13][14][15][16][17][18].Various flood propagation studies have focused on the use of the SPH method to investigate dam-break ...

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“…In the past couple of decades, this meshfree Lagrangian method became popular in many branches of computational fluid dynamics, such as hydrodynamics (Lee 2007), heat transfer (Danis et al 2013) and fluid-solid interaction (Amini et al 2011). Traditionally, the pressure is explicitly evaluated from a weakly compressible equation of state, which enforces another time step criterion related to a virtual speed of sound.…”

Section: Introductionmentioning

confidence: 99%

“…According to the aforementioned problems of Lagrangian methods, it seems tempting to use an Eulerian frame of reference in a meshfree method such as SPH. Danis et al (2013) used ISPH and Boussinesq approximation to model transient natural convection in a square cavity for an Eulerian uniform grid, to show the upper limit of the accuracy of the SPH method in general.…”

Section: Introductionmentioning

confidence: 99%

Eulerian ISPH Method for Simulating Internal Flows

Ordoubadi

Farhadi

Yeganehdoust

et al. 2016

JAFM

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In this article the possibility to use Eulerian approach in the conventional ISPH method in simulation of internal fluid flows is studied. The use of Eulerian approach makes it possible to use non-uniform particle distributions to increase the resolution in the sensitive parts of the domain, different boundary conditions can be employed more freely and particle penetration in the solid walls and tensile instability no longer require elaborate procedures. The governing equations are solved in an Eulerian framework containing both the temporal and local derivatives which make the momentum equations non-linear. Some special treatment and smaller time steps are required to remedy this non-linearity of the problem. In this study, projection method is used to enforce incompressibility with the evaluation of an intermediate velocity and then this velocity is projected on the divergence-free space. This method is applied to the internal fluid flows in a shear-driven cavity, Couette flow, a flow inside a duct with variable area and flow around a circular cylinder within a constant area duct. The results are compared with the results of Lagrangian ISPH and WCSPH methods as well as finite volume and Lattice Boltzmann grid based schemes. The results of the studied scheme have the same accuracy for velocity field and have better accuracy in pressure distribution than ISPH and WCSPH methods. Non-uniform particle distributions are also studied to check the applicability of this method and Good agreement is also observed between uniform and non-uniform particle distributions.

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ISPH modelling of transient natural convection

Cited by 41 publications

References 42 publications

Modeling of multi-phase flows and natural convection in a square cavity using an incompressible smoothed particle hydrodynamics

Modeling of multi-phase flows and natural convection in a square cavity using an incompressible smoothed particle hydrodynamics

Smoothed Particle Hydrodynamics Modeling with Advanced Boundary Conditions for Two-Dimensional Dam-Break Floods

Eulerian ISPH Method for Simulating Internal Flows

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