scholarly journals An advanced hybrid smoothed particle hydrodynamics–fluid implicit particle method on adaptive grid for condensation simulation

2020 ◽  
Vol 31 (6) ◽  
Author(s):  
Jiajun Shi ◽  
Chen Li ◽  
Changbo Wang ◽  
Hong Qin ◽  
Gaoqi He
Keyword(s):  
Smoothed Particle Hydrodynamics ◽  
Particle Method ◽  
Adaptive Grid ◽  
Particle Hydrodynamics ◽  
Smoothed Particle

scholarly journals Study on Particle Inconsistency Problem in Smoothed Particle Hydrodynamics

2011 ◽  
Vol 94-96 ◽  
pp. 1638-1641 ◽  
Author(s):  
Gui Ming Rong ◽  
Hiroyuki Kisu
Keyword(s):  
Smoothed Particle Hydrodynamics ◽  
Particle Method ◽  
Second Derivative ◽  
Sph Method ◽  
New Approach ◽  
First Derivative ◽  
Numerical Studies ◽  
Particle Hydrodynamics ◽  
Smoothed Particle ◽  
Finite Particle

In the smoothed particle hydrodynamics (SPH) method, the particle inconsistency problem significantly influences the calculation accuracy. In the present study, we investigate primarily the influence of the particle inconsistency on the first derivative of field functions and discuss the behavior of several methods of addressing this problem. In addition, we propose a new approach by which to compensate for this problem, especially for functions having a non-zero second derivative, that is less computational demanding, as compared to the finite particle method (FPM). A series of numerical studies have been carried out to verify the performance of the new approach.

AN OVERVIEW ON SMOOTHED PARTICLE HYDRODYNAMICS

2008 ◽  
Vol 05 (01) ◽  
pp. 135-188 ◽  
Author(s):  
M. B. LIU ◽  
G. R. LIU ◽  
Z. ZONG
Keyword(s):  
Smoothed Particle Hydrodynamics ◽  
Particle Method ◽  
Hypervelocity Impact ◽  
Material Strength ◽  
Approximation Process ◽  
Approximation Accuracy ◽  
Particle Hydrodynamics ◽  
Fundamental Cause ◽  
Smoothed Particle ◽  
Consistency Restoring

This paper presents an overview on smoothed particle hydrodynamics (SPH), which is a meshfree, particle method of Lagrangian nature. In theory, the interpolation and approximations of the SPH method and the corresponding numerical errors are analyzed. The inherent particle inconsistency has been discussed in detail. It has been demonstrated that the particle inconsistency originates from the discrete particle approximation process and is the fundamental cause for poor approximation accuracy. Some particle consistency restoring approaches have been reviewed. In application, SPH modeling of general fluid dynamics and hyperdynamics with material strength have been reviewed with emphases on (1) microfluidics and microdrop dynamics, (2) coast hydrodynamics and offshore engineering, (3) environmental and geophysical flows, (4) high-explosive detonation and explosions, (5) underwater explosions, and (6) hydrodynamics with material strength including hypervelocity impact and penetration.

Validation of a Smoothed Particle Hydrodynamics Code for Internal Flow Simulations: Application to Hemodynamics in a Realistic Left Heart Cavity Model

2010 ◽  
Author(s):  
Shahrokh Shahriari ◽  
Ibrahim Hassan ◽  
Lyes Kadem
Keyword(s):  
Reynolds Number ◽  
Left Ventricle ◽  
Smoothed Particle Hydrodynamics ◽  
Particle Method ◽  
Free Surface Flows ◽  
Left Heart ◽  
Flow Simulations ◽  
Moderate Reynolds Number ◽  
Particle Hydrodynamics ◽  
Smoothed Particle

A numerical simulation of flow in the left heart cavity, left ventricle, based on Smoothed Particle Hydrodynamics, a meshfree particle method is presented. Most of the works using this numerical method have been dedicated to simulation of free surface flows or internal flows with low Reynolds number. The present study is the first work dedicated to simulate the complex flow in a realistic rigid model of left ventricle applying the realistic pulsatile inlet velocity (having moderate Reynolds number) using a meshfree particle method. The numerical validation of our code is performed through the simulation of flow in a cavity at a Reynolds number equal to 1000. Also, the comparison of the results of flow simulation in a simplified geometry of left ventricle with the finite volume results is presented. The smoothed particle hydrodynamics method was able to resolve the flow patterns showing its potential to be applied in complex cardiovascular flow simulations.

PARTICLE MESH HYDRODYNAMICS FOR ASTROPHYSICS SIMULATIONS

2007 ◽  
Vol 18 (04) ◽  
pp. 610-618 ◽  
Author(s):  
PHILIPPE CHATELAIN ◽  
GEORGES-HENRI COTTET ◽  
PETROS KOUMOUTSAKOS
Keyword(s):  
Smoothed Particle Hydrodynamics ◽  
Three Dimensional ◽  
Particle Method ◽  
Compressible Euler Equations ◽  
Particle Interactions ◽  
Governing Equations ◽  
Compressible Euler ◽  
Particle Hydrodynamics ◽  
Smoothed Particle ◽  
High Order Interpolation

We present a particle method for the simulation of three dimensional compressible hydrodynamics based on a hybrid Particle-Mesh discretization of the governing equations. The method is rooted on the regularization of particle locations as in remeshed Smoothed Particle Hydrodynamics (rSPH). The rSPH method was recently introduced to remedy problems associated with the distortion of computational elements in SPH, by periodically re-initializing the particle positions and by using high order interpolation kernels. In the PMH formulation, the particles solely handle the convective part of the compressible Euler equations. The particle quantities are then interpolated onto a mesh, where the pressure terms are computed. PMH, like SPH, is free of the convection CFL condition while at the same time it is more efficient as derivatives are computed on a mesh rather than particle-particle interactions. PMH does not detract from the adaptive character of SPH and allows for control of its accuracy. We present simulations of a benchmark astrophysics problem demonstrating the capabilities of this approach.

Smoothed Particle Hydrodynamics Simulation of Flow Through a Bileaflet Mechanical Heart Valve: Advantages and Prospects

2011 ◽  
Author(s):  
Shahrokh Shahriari ◽  
Hoda Maleki ◽  
Ibrahim Hassan ◽  
Lyes Kadem
Keyword(s):  
Heart Valve ◽  
Smoothed Particle Hydrodynamics ◽  
Heart Valves ◽  
Mechanical Heart Valve ◽  
Particle Method ◽  
Generation Process ◽  
Bileaflet Mechanical Heart Valve ◽  
Particle Hydrodynamics ◽  
Smoothed Particle ◽  
Flow Through

A numerical simulation of pulsatile flow through a bileaflet mechanical heart valve is presented using smoothed particle hydrodynamics (SPH), a meshfree particle method. In SPH, the flow is modeled using fluid particles moving within the domain in which there is no mesh generation process and the conservation of mass is satisfied automatically. SPH showed a good capability to capture the main hemodynamic trend. The particle based nature of SPH allows also blood particle tracking, an important component in order to analysis the level of hemolysis induced by bileaflet mechanical heart valves.

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