Search results

Z.F.Wang [5] used Computational Fluid Dynamics (CFD) simulation to calculate the air collector thermal performance.
C.J .Wang [6] used CFD to analyze air permeability collector performance.
They found that the simulation results and experimental results match very well.
So, numerical simulation has become one of most important methods to design the efficient and lower cost collectors.
Fig.2 The mesh of collector The simulation was conducted by solar radiation model with software Fluent6.0.

The Simulation and Experiment Study on the Gas Flow in the No-loaded and Cold Vacuum High-pressure Gas Quenching Furnace Zhijian Wang 1,a and Xiaofeng Shang 1,b 1School of Mechanical and Electrical Engineering, Shenyang Aerospace University, Shenyang Liaoning, China, 110136 awangzhijian1974@sina.com, bxfshang@vip.sohu.com Keywords: Vacuum high-pressure gas quenching, Hot wire anemometer, CFD, Flow field, Pressure field.
Hot wire anemometer is used to measure the speeds of some feature points, on the one hand to provide boundary conditions for the numerical simulation, and on the other hand to compare with the numerical simulation results.
Computational Fluid Dynamics (CFD) is an important method to study the complex gas flow during high pressure gas quenching.
Fig. 5 Comparison of computer simulation with Fig. 6 Comparison of computer simulation with experimental results (X=0,Y=0.4m) experimental results (X=0, Z=0.29m) In order to compare experimental results and simulation results, we take different positions to make speed curves.
Fig. 7 Comparison of computer simulation with Fig. 8 Comparison of computer simulation with experimental results (X=0, Z=0.525m) experimental results (X=0, Z=-0.525m) Comparing the simulation results with the measured results, we can find they are basically consistent, and the error is within 10%, which proves that numerical simulation of flow field calculation and prediction is feasible and the results are reliable in high pressure gas quenching device.

CFD simulation on Laika also shows that the use of orini and powire can reduce the indoor air temperature.
Computer simulation using CFD indicated that orini can cool the entire building and the indoor temperature achieved is lower when compared to conventional wall.
In order to obtain validation data on thermal comfort with regard to the use orini and powire on Laika, simulation using Computational Fluid Dynamics (CFD) of DesignBuilder was carried out to obtain data on temperature and wind flow.
The simulation results shows that with outdoor air temperature 27°C, the system of orini and powire can reduce the indoor air temperature by 2.09°C (27°C outdoor, 24.91°C indoor).
Simulation results for temperature and wind flow in Laika (Source: author) Actually orini and powire are an integrated system with the overall shape and material of Laika.

It seems that CFD and 3-D Green function are more applicable for solving the added resistance problem than traditional methods.
Computational fluid dynamics method In recent years computational fluid dynamics (CFD) has been applied to flows about a ship in waves.
Orihara et al developed a new simulation called WISDAM-X, in which RANS equation and the continuity equation were solved using the finite-volume method in the framework of an overlapping grid system.
Domestic studies increasingly concerned about added resistance in waves with CFD method.
CFD and 3-D Green Function [51] seem to be more reasonable to solve the added resistance in waves.

This work presents the effect of V cut and square cut rotors in circular tubes for turbulent heat transfer using computational fluid dynamics (CFD) modeling.
Fig.1: Figure of rotor–assembled strand Numerical Simulation Problem Formulation.
Some important geometry parameters of rotors employed in the simulation are listed in Table 1.
A three-dimensional numerical simulation of the heat transfer and flow resistance was conducted using the FLUENT 6.3.
The CFD model involves numerical solutions of the conservation equations for mass, momentum and energy.

FDS [12] is a field model, or known as application of Computational Fluid Dynamics (CFD).
The Navier-Strokes equations are solved in FDS using large eddy simulation to account for subgrid turbulence.
Because of the very large number of cells, CFD models avoid the more generalized engineering equations used in zone models.
For CFD results, smoke layer interface heights are deduced by different methods as described earlier [14,15].
The CFD field model FDS can give good predictions for comparing with the hot smoke test.

The aerodynamic theory for the fan impeller is introduced and the module analysis is conducted to calculate the flow parameters more accurately, the lift coefficient is modified by taking into account the specific shape of the blade, and an empirical parameter is also replaced by the CFD simulation based on FLUENT software.
At present, with the exception of CFD (computational fluid dynamics) simulation where CAA (computational aerodynamic acoustics) is involved, the main noise prediction model of the fan can be grouped into two categories: (1) the wake shedding model represented by Fukano et al. [1] and Lee et al. [2], whose main idea is to describe the turbulent noise of the shedding vortex at the trailing edge of the blade of the fan using a simple physical model taking the wake width as the main parameter.
Huang [5] devoted the model of Lowson [3] to the simulation of a computer cooling fan, and achieved good results.
Table 2 shows the comparison of the lift coefficient of different sections using the Wu et al. model [4], the flat plate formula, the modified model and the FLUENT simulation, respectively.
It is shown that the numerical results of the lift coefficient in the modified model are more closely to those of the FLUENT simulation.

Based on CFD, the flow field was calculated and analyzed with partition plate settings.
CFD Computation and Analysis of Separator Effect of the Primary Partition plate’s Location.
Fig.4 CFD Computing Graph When the Height of the Inclined plates is 0.3m (a) Graph of Velocity Vector (b) Graph of Oil-drop Trail From the graph of Velocity Vector, when the the inclined section size of the primary partition plate is increased gradually, the main separation space occupied by the primary partition plate also increases gradually.
(a) Graph of Velocity Vector (b) Graph of Oil-drop Trail Fig.5 CFD Computing Graph When the Height of the Auxiliary Partition is 0.3m The influence on the oil-water separation efficiency by the change of the auxiliary short baffle height is shown in Fig.6.
Numerical simulation and experimental study on flow field of gravitational separator.

Simulation of Hydrodynamics and Reaction Behavior in an Industrial RFCC Riser Aisha Ahmed1, a, A.
Therefore, many research studies have been employing the CFD modeling for the FCC riser and downer reactors [2-6].
In the last decade, CFD technique has received much more attention when modeling a gas-solid multiphase flow reactor.
In this work an industrial RFCC riser with high Conradson carbon residue feedstock is modeled and simulated using CFD tools.
Therefore, the CFD approach was applied to simulate the flow behavior and catalytic cracking reactions in RFCC riser reactor.

Simulation and Analysis Gas distribution in fully mechanized coal face.
The application of CFD in air flow design of air-conditioned room.
Numerical simulation of droplet-particle flow in the scrubber for FGD.
Gas Transport Law and Numerical Simulation Under Ventilation.
The application of CFD in air flow design of air-conditioned room.