Search results

It is therefore significant to visualize the filling process by using a simulation approach.
Experimental Study and Numerical Simulation on the Blistering Defect during Thixocasting.
Fig. 1 Schematic drawing of the computational part and corresponding monitored locations during simulation. 2.2 Numerical procedure In the present work, commercial CFD software FLUENT (version 16.2) has been used to develop a three-dimensional isothermal numerical model of semi-solid die filling process using Eulerian multiphase flow approach.
Fig. 3 shows the quantitative solid fraction along line (A-B) and simulation results for comparison.
Comparing with one-phase simulation, it is reasonable to conclude that multiphase simulation of semi-solid die casting has significant advantages in modelling gas entrapment.

Fluid Structure Interaction (FSI) coupling between 3-D Computational Fluid Dynamic (CFD) and 3-D pipeline model code has been developed to assess the stresses on the pipe due to slug flow.
Simulation Model Star-CCM+ is used to solve the equations of the both fluid and solid domains using the finite volume solver.
Simulation Scheme.
The simulation was conducted for carbon steel straight pipe with a length L=8 m, Outer Diameter OD=80 mm, and thickness t=6 mm containing air and water.
Pontaza, "Flow-Induced Vibrations of Subsea Piping: A Screening Approach Based on Numerical Simulation," in SPE Offshore Europe Oil and Gas Conference and Exhibition, 2013

However the cost of simulation can prohibit its use.
However the simulation costs are very similar.
It is clear that simulation is not the total answer.
Of over the 66 dies designed, recently by Casting Services, more than 23 had to be completed without the use of CFD simulation.
This was used to obtain the required length of each runners for multiple cavity runners and thereby reduce the number of simulation iterations and cost of simulation.

For computational analysis, the Fire Dynamics Simulator was used with Large Eddy Simulation model for turbulence.
In Figure 4, the results from the fire test in the real house and simulation has been shown by comparing with picture.
In case of the initial stage of fire, fire development in the fire test and the simulation has a similar pattern until opening the fire door.
The occurrence time of flash-over for each room in the fire test and simulation has been summarized in Table 3.
Mawhinney, "CFD Investigation of Large Scale Pallet Stack Fire in tunnels Protected by Water Mist Systems", Journal of Fire Protection Engineering, Vol.20, pp.149-198(2010)

In this model, different shapes of parabola, distances of eccentricity, and depths of interference are considered, and then a series of numerical simulation are carried out.
Finally, according to the results of all the numerical simulations, a comprehensive correlation between the thermal constriction resistance and these parameters is obtained.
Figure 4 Single asperity contact model Numerical Model and Simulation The numerical simulation model is based mainly on the contact model described previously, but with a cylinder of radius b and length L which is six times bigger than b.
The numerical simulations were performed for different values ofβ0, h0 and r0.
A commercial CFD software FLUENT was used to numerically solve the model problems with all the boundaries mentioned previously.

The influence of cell shape, relative density and pore gases on the macroscopic honeycomb thermal properties is investigated by means of transient dynamic computational simulations.
The general purpose CFD package ANSYS CFX 11 was used for the time dependent thermal analysis.
According to these simulations the proper mesh size (l ≈ 0.09 mm) and time step (∆t = 0.1 s and ∆t = 0.01 s in case of considering the convection) were set.
For this purpose transient simulations considering heat conduction in the base material and pore gas have been performed.
The influence of the natural convection was analyzed with additional computational simulations.

It has revisable source code and is widely used in fire scenario simulation of buildings.
It is directly related with the simulation accuracy and the fire fighting and rescue plan for emergency according to the simulation.
The peak temperature of T7 is higher than that of other points in the simulation with the same parameters.
Compared with the results of simulation without ventilation, the temperature difference between detecting points along tunnel ceiling in simulation of U = ﹣2.7 m/s diminishes obviously.
Model Experimental and CFD Simulation Research on Road Tunnel Fire.

A number of researchers have studied the various types of SMs (KSM, LSM, SMX, and SMV) have been proposed in the simulation and experiment.
Fourcade, et al (2001) simulated the rate of striation thinning value from a laminar flow field of KSM and SMX types using computational fluid dynamics (CFD) method.
Iedema, CFD calculation of laminar striation thinning in static mixer reactors, Chemical Engineering Science. 56 (2001) 6729-6741

The 1.5 m high south wind environmental simulation Table 1.
The 1.5 m high north by east wind environmental simulation Table 2.
The funneling simulation in open space Fig. 6. 1.5 m high environmental simulation of road space The layout of roads.
Wind rose of Guilin The simulation and analysis of campus wind environment.
Conclusions PHOENICS, the software of the computational fluid dynamics (CFD), which is used as a wind environmental simulation tool, studies the impact mechanism on wind environment of combination form of building groups, building interval, building orientation, open space and the road layout combining with the site plan of Zhemu Middle School.

The effects of bionic wavy surface on the aerodynamic and aeroacoustic performance of the cylinder are investigated by wind tunnel and numerical simulation.
We used the software ANSYS FLUENT to research the effect of the bionic wavy surface on the aerodynamic characteristics and aerodynamic noise of a cylinder by the Large Eddy Simulation(LES) and the Ffowcs Williams and Hawkings (FW-H) equation.
Fig.4 Boundary conditions 3 Comparison of simulation results 3.1 The SPL (sound pressure level) comparison of the cylinders The SPL comparison spectrum at the noise monitoring points of smooth cylinder and wavy surface cylinder is depicted in Fig.5.
According to the numerical simulation results, the total sound pressure level(SPL) of bionic wavy cylinder model is reduced by 6.7dB compared with smooth cylinder model at uniform velocity of 42m/s. 3.
According to the results of numerical simulation, bionic wavy structure can reduce the frequency of vortex shedding on cylindrical surface, so the fluctuating pressure should be lowered correspondingly, and thus the aerodynamic noise is lowered.