Search results

CFD (Computational Fluid Dynamics) simulation validated with experimentation can be a good alternative for performing series of experiments.
CFD modeling and simulation for the best fin design has been carried out for the current study.
The simulation was performed using ANSYS 14.5.
The initial assumptions are, in general, the simulation is under steady state.
Result and Discussions Velocity, Temperature and pressure data were obtained from CFD simulation results.

CFD Analysis of Hydrodynamic Pressure Distribution in Non-Newtonian Oil in Journal Bearing Lubrication Gap Adam CZABAN Gdynia Maritime University, Morska 81-87, PL-81-225 Gdynia, Poland aczaban@am.gdynia.pl Keywords: journal bearing, hydrodynamic pressure distribution, CFD, Ostwald–de Waele lubricant.
Simulations were carried out by using the commercial software ANSYS Academic Research CFD for fluid flow phenomenon (Fluent).
The simulations concern bearing lubricated with oil which has viscosity properties as Shell Helix Ultra AV-L, investigated in the paper [3].
Summary Nowadays CFD software can be used to investigate a variety of phenomena.
Descombes, CFD model for turbocharger journal bearing performances, Applied Thermal Engineering 31 (2011) 811–819

Due to the complex nature of compressors’ geometry, 1D and 2D CFD simulations cannot simulate the physical turbomachineries with sufficient fidelity.
CFD Simulation Strategy Due to the high computational requirements of the simulation, considering the hardware capabilities and the computational time, the rotational periodic boundary condition has been applied in this project.
Meshing: In CFD simulation, the hexahedral elements are commonly used in turbo passages.
Figure 1.Mesh of impeller and wedge diffuser passage Figure 2.Static pressure ratio for stage simulation Governing Equations The unsteady Navier-Stokes equations in conservative form are set as the solve equation in CFD solver [8].
The results demonstrated the potentials of a fully integrated approach to high-fidelity analysis utilizing 3D CFD simulation.

In order to adapt to new modern car styling, the aerodynamic numerical simulations based on computational fluid dynamics(CFD) are applied to the process of car styling.
Proposed aerodynamic automobile design method is based on numerical simulations, according to experience in air vehicle dynamics studies.
Numerical method is also called computational fluid dynamics (CFD), which is a new numerical simulation method adapted to fluid dynamics study with the development of the computer technology evolution in recent years .Using CFD method has the advantage of spending less time, without being limited by the experimental conditions, less expenditure, etc.
Conclusion This paper summed up the design method based on combing CAD and CFD and introduced how to use CFD software to realize numerical simulation of automotive aerodynamics.
On CFD Investigations of Vehicle Aerodynamics with Rotating Wheels' Simulation, SAE technical Paper, 2006-01-0804.

CFD Simulation of Enhanced Oil Recovery using Nanosilica/Supercritical CO2 Malahat Ghanad Dezfully, Arezou Jafari* and Reza Gharibshahi Chemical Engineering Department, Tarbiat Modares University, Tehran, Iran *ajafari@modares.ac.ir Keywords: Gas Injection, EOR, Nanosilica, Heavy Oil, Sc-CO2, CFD.
In this study series of runs were done by a CFD technique in which the injected fluid is nanoparticles/supercritical CO2.
All simulations were continued until 10000s at which the oil production rate was stabilized.
For other simulations nanosilica/supercritical CO2 is injected and it is assumed that the porous medium is totally saturated with the oil at 313 k and 100 bar. 3- The constant flow rate 8×10-4 cc/min is applied. 4- For all simulations Δt=0.1 s has been selected.
Jafari, CFD simulation of complex phenomena containing suspensions and flow through porous media, Lappeenranta University of Technology, (2008)

Liu School of Mechanical and Manufacturing Engineering, the University of New South Wales Sydney, NSW 2052, Australia Keywords: Abrasive waterjet, CFD simulation, Particle velocity models, AWJ cutting.
In this paper, the dynamic characteristics of particles in an AWJ, typically the particle velocity distribution, are investigated and mathematically modelled based on the findings of a CFD (computational fluid dynamics) simulation study.
Characteristics of Particle Velocity In the CFD simulation of particle dynamic characteristics for AWJs [5,6], a pure waterjet with the peak inlet velocities at the nozzle exit ranging from 600 to 900m/s and nozzle diameters of 0.8, 1.0 and 1.2mm was first considered using a Fluent6 flow solver.
The CFD simulation considered the jet flow domain from the nozzle exit to 50mm downstream.
From a CFD simulation of AWJs, it has been found that the particle velocity decays as the jet travels away from the nozzle, and smaller particles decelerate more rapidly than large particles.

In this study, we perform CFD simulation (Utilizing XFlow CFD [5]) of a designed wind booster in order to analyze what effects it has on a wind stream that lead to an increase in the overall angular speed of the vertical axis wind turbine (VAWT) at low wind speed conditions of approximately 1 m/s to 8 m/s.
CFD simulation of wind flow through the wind booster.
The experiment is performed based on CFD simulation.
Fig. 5 shows the example of CFD simulation at steady state of rotation of the standalone wind turbine (a), and the wind turbine which is equipped with the booster (b).
Retrieved from http://www.xflow-cfd.com/

Three-dimensional computational fluid dynamics (CFD) simulations have been conducted to evaluate and to optimize the designs of the main components of the system.
Stator channels Rotor channels M Electric motor ω Figure 2: left rotary-piston valve, right CFD simulation to determine the properties of the valve Connection to tank Connection to pump Connection to cylinder Fluid domain of the stator Fluid domain of the rotor Connection to pump Connection to cylinder Fluid domain CFD Simulation 3D Model The 3D model of the valve with the main components of a rotor and a stator is shown in Fig. 2.
In addition the CFD simulation provides the basis for the next improvement of the valve.
The CFD simulation has played an important role in understanding the flow behavior and in determining the characteristics of the proposed rotary piston valve and high-frequency cylinder.
The test results will be used to validate the CFD Simulation and furthermore to enable a design optimization of the hydraulic actuator.

An axisymmetric CFD model has been developed to initially examine the steady-state flow characteristics generated by different inlet entry radii.
CFD Models The CFD approach uses the Navier-Stokes equations, as given below in the general form, to calculate the velocity and pressure of fluid flow of the system
Results and Analysis In this research, all computations were carried out using the general purpose CFD software FLUENT.
The volumetric efficiency is found showing a fairly uniform distribution with little distinction between the different simulations.
Conclusions The pressure wave phenomenon discussed previously can be seen in these simulations.

Numerical Simulation of Double Inlet Cylinder Cyclone Using CFD YUAN XIAO MING1, a, ZHAO HUI JUN1 and QU JING YI2 1School of Petroleum Engineering, Changzhou University,China,213000 2 Sinopec Qingdao LNG Co., Ltd, China, 266400 amagic_ming_c4@126.com Keywords: Cylindrical Cyclone; Numerical Simulation; Oil/Water Separation; Double Inlet; CFD Abstract.
And now, the CFD technology, with the advantage of less investment and shorter processing, is widely used.
Taking the CFD technology to predict internal flow field characteristics and separation efficiency of hydrocyclone has been very mature.
Numerical simulation of turbulent flow Basic control equation.
During the simulation, inlet velocity is 5m/s, discrete phase (oil) of the volume fraction of 8%, based on the simulation results are obtained after processing, the hydrocyclone flow characteristics.