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In this paper a simulation framework focusing on these microscopic effects is presented.
The interaction is not assumed to be a particular function of the Reynolds number, which is an advantage over traditional CFD-DEM couplings.
Right, the particle assembly used for the simulations of this study formed by two distinct particle sizes.
Initially, a DEM simulation stage is carried out to prepare the sample.
Pedroso, Molecular dynamics simulations of complex-shaped particles using Voronoi-based spheropolyhedra.

Preliminary Simulation of the Flow in the Root Canal Using New Irrigation Needle Dragos ISVORANU1, a *and Sterian DANAILA1,b 1Elie Carafoli Dept. of Aerospace Sciences, University Politehnica of Bucharest, 1, Gheorghe Polizu Street, 011061-Bucharest, ROMANIA adragos.isvoranu@upb.ro, bsterian.danaila@upb.ro Keywords: irrigation needle, two-phase fluid flow, root canal, wetting properties Abstract.
Our simulation results show great efficiency of the irrigation procedure in terms of the irrigant volume fraction and wall shear stress at the wall of the root canal over entire working length.
This assertion is acknowledged in literature, see for example [9], but no one has ever considered this stage as an indispensable prerequisite for a reliable simulation of the fluid mechanics of the irrigation process.
Previous CFD investigations in root canal irrigation [1, 8, 9, 10, 11, 12, 13, 14] considered only irrigant mass flow rate, size and type of the needle and the distance between the tip of needle and the apical foramen as analysis parameters.
The simulation is performed within Ansys CFX environment.

The change of parameter parameter Pipeline spacing （0.1， 0.2，025 m） Pipe diameter （0.03，0.04，0.05m） The depth of buried pipes （0.8，0.1，0.12m） The environment temperature of concrete （0， -5， -10degree） Simulation results The temperature distribution and the transformation law of phase interface.
Conclusion In this paper, the running characteristics of snow-melting system with using geothermal sources were simulated based on the Computational Fluid Dynamic (CFD).
Fluid simulation calculating examples and engineering application [M].

Mesh division is the basis for numerical simulation and it will directly affect the accuracy of numerical computation.
The simulation result of lift characteristics of airfoils NACA 4415 with or without modification is shown in Fig. 2.
Lift coefficient of airfoils NACA 4415 with or without modification cl/cd Airfoil without modification Airfoil with simple Gurney flap Airfoil with remodeled Gurney flap Angle of attack /° Fig.2 Lift-drag ration of NACA4415 and its modified airfoils The simulation result of Lift-drag ration of NACA4415 and its modified airfoils with angle of attack of airfoils NACA 4415 with or without modification is depicted in Fig. 2.
Flow field of non-modified airfoil NACA4412 and its modified airfoils at 16 degree angle of attack x/m (a) Non-modified airfoil NACA 4415 y/m x/m (b) Airfoil with simple Gurney flap y/m x/m (c) Airfoil with remodelled Gurney flap y/m Summary By using common software Fluent for CFD, numerical simulation is investigated in connection with the airfoil NACA 4415 and its modification.

Experiments and simulations were carried out to assess a passive device for cooling photovoltaic cells under concentrated sunlight.
Its interest for CPV applications was assessed by performing heat transfer simulations in combination with experimental measurements.
A second simulation was performed for a pure Al enclosure (see text).
Numerical simulations.
Xu, "Modeling Phase Change Material in Electronics using CFD- A case study", Proc.

Simulation Model on entrainment process of suction mouth under negative pressure in the medium dry sanitation trucks Physical model.
Figure2 Suction mouth CFD simulation model Mathematical model.
Simulation setting.
Because the model can maximally pick up the particle diameter of 10mm, so this paper mainly aims at simulation analysis of this kind of particle.
Simulation results According to numerical simulation, the simulation results for the flow field were obtained in Figure3~ Figure5 and the particle motion trajectory was obtained in Figure 6.

Dong Gu Kang and colleagues [1] have studied the effects between fluids and solids on the basis of the impact on the increase of pressure, pressure surge, using computational fluid dynamics (CFD).
The differences are obvious when taking into account the coupled water hammer and single water hammer in a fluid pipe system by comparing with numerical simulation.
Studies of flow-structure interaction involve Last Eddy Simulation in the fluid domain: (1) (2) where (i = 1,2,3) is the instantaneous velocity component, is the velocity resolved scale, is the velocity sub grid scale, p is the pressure, ρ is the density and ν is the kinematic viscosity of the water.

The numerical method was also used to flow simulation with different attack angle and side angle, and numerical results were consistent with conclusion in the literature.
CFD (Computational Fluid Dynamics) is one of them, and many scholars at home and abroad study secondary flow phenomena using it.Ding Jue [3] and some investigators studied the flow and its characteristics in bending tube based on the structured grid theory model.
This paper uses simulation carried out to verify the experimental data.
Conclusion (1) This paper ,using numerical simulation method, study the fluid flow characteristics of square cross section bending the pipe.
Numerical simulation of theorectical models & flow characteristics in 900 bending duct.

Numerical simulations The numerical simulations include the development of an axi-symmetric model of the squeeze mode MR mount of Fig. 1, the parameter sensitivity study as well as calculations of the complex transfer function of the MR mount when subjected to a sweep-sine displacement input.
The study shows simulation results and is carried out for the purpose of the demonstration of the squeeze mode performance characteristics.
It seems from the simulations the best effect with the squeeze mode mount can be achieved in cases involving small initial (mid-position) gaps.
Finally, a parallel study involving a CFD model of the mount is in progress.
Stanway, A numerical simulation of electrorheological fluids in oscillatory compressive squeeze flow, J.

Simulation and analysis on the pressure-increasing effect of the pipeline supercharging caused by self-oscillation cavity were carried out by finite element method.
Previous experimental results are accordant with the present simulation results.
The flow field analysis of 3D un-compressible flow may be predigested as the 2D problem by using commercially available Finite Element-code FLOTRAN CFD function of ANSYS.
We may therefore conclude that the numerical analyses are reliable since the experimental results in [4] are accordant with the present simulation results.
[3] Qian Sheng-hua: Numerical Simulation of Self-oscillation Cavity Flow Field, Natural Gas Industry, Vol. 6 (2004), p.26-30