Smoothed particle hydrodynamics (SPH) for complex fluid flows: Recent developments in methodology and applications

Purpose This study aims to focus on the numerical simulation of natural convection from heated novel fin shapes in a cavity filled with nanofluid and saturated with a partial layer of porous medium using improved incompressible smoothed particle hydrodynamics (ISPH) method. Design/methodology/approach The dimensionless of Lagrangian description for the governing equations were numerically solved using improved ISPH method. The current ISPH method was improved in term of wall boundary treatment by using renormalization kernel function. The effects of different novel heated (Tree, T, H, V, and Z) fin shapes, Rayleigh number Ra(103 – 106 ), porous height Hp (0.2-0.6), Darcy parameter Da(10−5 − 10−1 ) and solid volume fraction ϕ(0.0-0.05) on the heat transfer of nanofluid have been investigated. Findings The results showed that the variation on the heated novel fin shapes gives a suitable choice for enhancement heat transfer inside multi-layer porous cavity. Among all fin shapes, the H-fin shape causes the maximum stream function and Z-fin shape causes the highest value of average Nusselt number. The concentrations of the fluid flows in the nanofluid region depend on the Rayleigh and Darcy parameters. In addition, the penetrations of the fluid flows through porous layers are affected by porous heights and Darcy parameter. Originality/value Natural convection from novel heated fins in a cavity filled with nanofluid and saturated with a partial layer of porous medium have been investigated numerically using improved ISPH method.

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A Modified Smoothed Particle Hydrodynamics Scheme to Model the Stationary and Moving Boundary Problems for Newtonian Fluid Flows

Journal of Fluids Engineering ◽

10.1115/1.4028643 ◽

2014 ◽

Vol 137 (3) ◽

Cited By ~ 15

Author(s):

Mohammad Sefid ◽

Rouhollah Fatehi ◽

Rahim Shamsoddini

Keyword(s):

Smoothed Particle Hydrodynamics ◽

Moving Boundary ◽

Fluid Flows ◽

Boundary Problems ◽

Driven Cavity ◽

First Case ◽

Weakly Compressible ◽

Present Solution ◽

Particle Hydrodynamics ◽

Smoothed Particle

A robust modified weakly compressible smoothed particle hydrodynamics (WCSPH) method based on a predictive corrective scheme is introduced to model the fluid flows engaged with stationary and moving boundary. In this paper, this model is explained and practically verified in three distinct laminar incompressible flow cases; the first case involves the lid driven cavity flow for two Reynolds numbers 400 and 1000. The second case is a flow generated by a moving block in the initially stationary fluid. The third case is flow around the stationary and transversely oscillating circular cylinder confined in a channel. These results in comparison with the standard benchmarks also confirm the good accuracy of the present solution algorithm.

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The Mathematics of Smoothed Particle Hydrodynamics (SPH) Consistency

Frontiers in Applied Mathematics and Statistics ◽

10.3389/fams.2021.797455 ◽

2021 ◽

Vol 7 ◽

Author(s):

Leonardo Di G. Sigalotti ◽

Jaime Klapp ◽

Moncho Gómez Gesteira

Keyword(s):

Computer Graphics ◽

Smoothed Particle Hydrodynamics ◽

Recent Progress ◽

Convergence Properties ◽

Technical Developments ◽

Particle Hydrodynamics ◽

Recent Developments ◽

Smoothed Particle ◽

Numerical Tool ◽

Theoretical Foundations

Since its inception Smoothed Particle Hydrodynamics (SPH) has been widely employed as a numerical tool in different areas of science, engineering, and more recently in the animation of fluids for computer graphics applications. Although SPH is still in the process of experiencing continual theoretical and technical developments, the method has been improved over the years to overcome some shortcomings and deficiencies. Its widespread success is due to its simplicity, ease of implementation, and robustness in modeling complex systems. However, despite recent progress in consolidating its theoretical foundations, a long-standing key aspect of SPH is related to the loss of particle consistency, which affects its accuracy and convergence properties. In this paper, an overview of the mathematical aspects of the SPH consistency is presented with a focus on the most recent developments.

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Wave Interaction and Overwash with a Flexible Plate by Smoothed Particle Hydrodynamics

Water ◽

10.3390/w12123354 ◽

2020 ◽

Vol 12 (12) ◽

pp. 3354 ◽

Cited By ~ 2

Author(s):

Thien Tran-Duc ◽

Michael H. Meylan ◽

Ngamta Thamwattana ◽

Bishnu P. Lamichhane

Keyword(s):

Elastic Plate ◽

Smoothed Particle Hydrodynamics ◽

Fluid Motion ◽

Wave Interaction ◽

Fluid Flows ◽

Plate Motion ◽

Flexible Plate ◽

Mesh Free ◽

Particle Hydrodynamics ◽

Smoothed Particle

The motion of a flexible elastic plate under wave action is simulated, and the well–known phenomena of overwash is investigated. The fluid motion is modelled by smoothed particle hydrodynamics, a mesh-free solution method which, while computationally demanding, is flexible and able to simulate complex fluid flows. The freely floating plate is modelled using linear thin plate elasticity plus the nonlinear rigid body motions. This assumption limits the elastic plate motion to be small but is valid for many cases both in geophysics and in the laboratory. The principal conclusion is that the inclusion of flexural motion causes significantly less overwash than that which occurs for a rigid plate.

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