Search results

Effect of the compressible flow characteristics inside a high-speed electromagnetic valve on the operation of the valve is investigated using a numerical simulation.
The numerical simulation solves Navier-Stokes equations and heat transfer equations by coupling, and the compressible flow phenomena inside the valves are studied focusing on the shock structures. .
Most of the studies in the published literatures are 1) on the modeling of the dynamic characteristics of solenoid valves for using control methods[2,3,4], 2)numerical simulations on the pseudo-static and transient performance of the electromagnetic valve using finite elements and other computational methods [5,6].
Summary In the present study, three-dimensional unsteady compressible flow characteristics inside a solenoid on/off switching valve are investigated using a numerical simulation.
Spalding:Computer Methods for Applied Mechanics and Engineering Vol.3(1974), p.269 [9] D.Wilcox:Turbulence Modeling for CFD(DCW Industries, La Canada, CA, USA 1992) [10] R.L.Meakin: Handbook of Grid Generation, CRC Press.

Motion simulation of desulfurized fly ash in dense flow absorber based on computational fluid dynamics Qian Jia, Cunyi Song, Zhensong Tong, Donghui* Zhang, Kaihua Chen, Xi-ning Lu, Yue Zhang School of Civil and Environmental Engineering, University of Science and Technology Beijing, 100083, Beijing, China Email: jiamoney@126.com Keywords: dense flow absorber, desulfurized fly ash, sintering gas, numerical simulation, computational fluid dynamics Abstract.
This paper employed Fluent software based on Computational Fluid Dynamics (CFD) to simulate the track of desulfurized fly ash in flue gas.
In this simulation, velocity is 18 m·s-1, turbulence intensity is 2.46%, water head diameter is 3.2 m.
Fig.3 The abrasion rate gradient of inner surface and convex surface The deposition of desulfurized fly ash inside of tower body The deposition of desulfurized fly ash inside of tower body was evaluated based on numerical simulation.

Investigation Using Simulations for the Development of Low Cost Catalytic Converter from Non-Precious Metals A.K.M.
Simulations using FLUENT and COMSOL have shown the actual characteristics of the catalytic converter performance.
Hence CFD analysis is used to design efficient catalytic converters.
The simulation result of backpressure in catalytic converter is shown in Fig. 2 and Fig. 3.
Backpressure vs speed from simulation Figure 3.

Kefayati et al. [11] investigated simulation of natural convection in an open enclosure with water/copper nanofluid by Lattice Boltzmann method.
Sajjadi, Lattice Boltzmann simulation of natural convection in tall enclosures using water/SiO2 nanofluid, Int.
Hasanuzzaman, Application of Computational Fluid Dynamics (CFD) for nanofluids, Int.
Darzi, Lattice Boltzmann simulation of nanofluid in lid-driven cavity, Int.

In recent years, many authors have studied the fouling mechanism and the effect of fouling on gas turbine performance by CFD method or analytical model.
In the simulation of gas turbine performance, the prediction of compressor performance at various conditions is more crucial.
Simulation result analysis In order to demonstrate the validity of stage-stacking method, an 8-stage axial compressor is applied.
Simulation result shows that thermodynamic performance parameters are reduced with increase of operating time.

In 2007, Zhang Wenfang [18] probes the algorithm of the natural scenery in the virtual scene, based on the study of key water particle system and CFD physical model algorithm.
Different Methods Of Irregular Objects and Other Simulation Method.
It can display certain simulation scene, in case of not having high expectations for simulation of smoke, particle system method has the great advantage.
A simple texture images can replace so many particles of the simulation, so it can save a lot of computer resources, accelerate the speed of computer simulation.
Fluid Simulation with Articulated Bodies.

Numerical Simulation Computational Domain Size.
Navier-Stokes (RANS) equations and the realizable k-epsilon model are chosen in the simulation.
In order to compare the influence of two kinds of front thin plates on the aerodynamic resistance more intuitively, simulation without front thin plates and simulation without engine cabin were added, known as model 2 and 3 respectively.
The simulation results are shown in Table 1.
Numerical simulation of the influence of rear-end panels on the wake flow field of a heavy-duty truck[J].

Introduction In recent years, a few research groups have been developing and evaluating their computational methods, including both CFD and CSD ones, by using unique FV methods [1-4].
A new matrix-free implicit unstructured multigrid finite volume (FV) solver for structural dynamics was presented by Xia et al. [3] for incompressible flow FSI computation and a similar method was developed by Lv et al. [4] for compressible flow FSI simulation.
For all of the grids the simulation is performed by exerting the same load on the right tip of the cantilever until the solution is converged.
The calculation of case 2 give a perfect results compared with those obtained in case1 which means the boundary conditions do really affect the simulation results.
Computer Modelling and Simulation in Engineering 4 (1999) :213-218

Fig.4 The overall dimensions of computational domain (unit : mm) Mesh Used for the Numerical Simulation.
Tetrahedral mesh and prismatic mesh were applied in the simulation.
A Parametric Study on the Diffuser and Ground Clearance of a Simplified Car Model using CFD.
Effect of Turbulence Parameters on Numerical Simulation of Complex Automotive External Flow Field.
Basic Course of Convection Heat Transfer Numerical Simulation using ANSYS CFX.

Therefore, the study of this type of flow is of particular importance, where Chen et al. [30] used (CFD) simulations and RNG-K-Є turbulent with Eulerian multiphases model to test the two-phase gas-liquid flow characteristics in a vane flowmeter.
Jayaraj, CFD modeling of macro-encapsulated latent heat storage system used for solar heating applications, Int.
Ayub, Geometric optimization of shell and tube heat exchanger with interstitial twisted tapes outside the tubes applying CFD techniques, Appl.
[49] Yadav, Anil Singh, et al. "3-dimensional CFD simulation and correlation development for circular tube equipped with twisted tape."
"Numerical Simulation on the Flow Pattern of a Gas–Liquid Two-Phase Swirl Flow."