Search results

The effectiveness of adaptive press casting is demonstrated by using CFD model simulations.
As a final step in this study, we used CFD simulations to check the control performance using the obtained multi-step pressing velocity without a trial-and-error process.
The control performance using the switching velocity of Eq. 2 designed by the proposed simple model was reasonably validated by CFD simulation as shown in Fig. 6.
The simulation results of a simple model such that λ(Τend) is given as a constant value by fitting almost explains the results of the CFD model.
Finally, the obtained velocity reference's ability to control pressure fluctuation and to realize short cycle time was validated by the CFD simulations.

CFD model of the IGBTs’ air-cooled heat sink.
Simulations were run using different geometry parameters to find the best-performing structure in terms of heat transfer coefficient.
In each simulation, the ambient air temperature is 35 .
Figure2 shows the mesh of the whole CFD model.
According CFD compute result, the detail of fluid information will be revealed.

The results show that the biggest deviation of simulation on discharge coefficient linearity and relative pressure loss are less than 0.4% and 1.2%, the results simulated by CFD are in good agreement with that by experiment.
So computational fluid dynamics (CFD) numerical simulation tests based on orthogonal experiments and actual flow experiments are carried out in this research.
Comparisons between Simulations and Actual flow experiment The data comparison between actual flow experiment and CFD simulation are shown in Table 5.
The relative error is calculated by the equation (7)and (8) (7) (8) Where Eδ stands for the relative error calculated between the actual flow experiment and the CFD simulation on discharge coefficient linearity, δCFD stands for the value of discharge coefficient linearity got by CFD simulation and δEXP stands for the value of discharge coefficient linearity got by actual flow experiment; Eξ stands for the relative error calculated between the actual flow experiment and the CFD simulation on Relative pressure loss, δCFD stands for the value of Relative pressure loss got by CFD simulation and δEXP stands for the value of relative pressure loss got by actual flow experiment.
All of these data proves that the CFD simulation predicts is correct.

Simulation of A Mono Cylindrical Engine With LES Software GHERGHINA George1, a *, POPA Dragos Laurentiu1,b and TUTUNEA Dragos1,c 1The University of Craiova, Faculty of Mechanics, CALEA Bucuresti, no.107, Craiova, Romania agherghinag@yahoo.com, bpopadragoslaurentiu@yahoo.com, c dragostutunea@yahoo.com Keywords: 1D simulation, mono cylindrical, automotive industry, CFD tools, LES software.
Since CFD modeling of the whole engine is not feasible 1D codes are frequently used to optimize complex boosting systems for improved engine performance.
Computational Fluid Dynamics (CFD) simulations used in automotive industry allow engineers to understand flow behavior and quantify important flow parameters such as pressure drops or mass flow rates, with the condition that CFD tools have been properly validated against experimental data.
Duleba, Simulation of automotive engine in lotus simulation tools, Transfer inovácií 30/2014, pp. 48-52
Renberg, 1D engine simulation of a turbocharged SI engine with CFD computation on components, Licentiate Thesis, Stockholm, 2008

The model is incorporated into simulations based on an Eulerian approach.
There is a good agreement between the experimental technique and CFD simulation local solid holdup (εs) at the lower Er values in the magnetically stabilized fluidized bed.
Consequently, the simulations underestimate local solid holdup at high Er values.
Consequently, the simulations underestimate local solid holdup at higher Er values.
The k values from CFD computations are probably underestimated.

CFD Study of Wake Interaction of Two Wind Turbines Zixi Chen1, a, Neha Marathe1,b and Siva Parameswaran1,c 1Department of Mechanical Engineering, Texas Tech University, Lubbock, Texas, 79415, USA azixi.chen@ttu.edu, bneha.marathe@ttu.edu, csiva.parameswaran@ttu.edu Keywords: wind energy, wind turbine, wake interaction, CFD, virtual blade model.
Computational Fluid Dynamics (CFD) simulations are carried out to represent the velocity deficit behind two turbines in-line with the wind using the Virtual Blade Model (VBM).
VBM is an implementation of the Blade Element Method (BEM) within the commercial CFD code ANSYS FLUENT.
Results In the following, results obtained from simulations using VBM are presented.
Basically the simulation result is in good agreement with the wind tunnel data.

Solidworks Flow Simulation is one example of that, which along with many CFD modules has separate HVAC module to analyze and optimize the air conditioning designs effectively.
In current times CFD and different design tools of CFD has been used to optimize HVAC system.
Aim of this work is also to utilize the capabilities of CFD to optimize a HVAC design, by utilizing Solidworks flow simulation design tool.
CFD design software like Solidworks flow simulation provides an excellent solution to validate new HVAC design in ships and in other applications before actual construction.
CFD analysis and energy simulation of a gymnasium.

In order to obtain the optimal parameters of nozzle, a new integrated method combining genetic algorithm with CFD simulation analysis is put forward in this paper.
CFD Simulation Theoretical analysis.
Fig.1 shows the simulation domain and the boundary conditions.
Then the grid was imported into the commercial CFD code Fluent.
To realize design automation by integrating CFD simulation and design optimization, four basic functions must be provided by different software packages, i.e., parametric model, geometry integrated automatic meshing, unstructured CFD solver, and optimization tools.

For estimation of aerodynamic characteristics of cable-stayed footbridge deck a computational fluid dynamics (CFD) has been used.
Preliminary determination of simulation parameters have been estimated using laminar fluid flow model.
Subsequently, Smagorinsky large-eddy simulation (LES) turbulent model has been applied with different simulation parameters to obtain converged values.
For computation fluid flow past structures the most used method is computational fluid dynamics (CFD).
LES model is based on direct simulation of large eddies, which occur in space.

Flow Field Analysis and Response Surface Research on the Rotor in Dry Powder Inhaler Zhi Chen Caoa, Hao Ying Li*b, Shi Hong Shic, En Long Zhoud Bio-Manufacturing Research Centre, School of Mechanical and Electric Engineering, Soochow University, Suzhou 215021, China aczcycit@126.com, blihaoying@suda.edu.cn, cshishihong@suda.edu.cn,dlufei_1234@126.com Keywords: Dry powder inhaler; CFD; Rotor; Numerical simulation; Response surface Abstract.
The simulation of the suction drive rotor rotation mechanism was based on MRF model in FLUENT.
Numerical Simulation Modelling and meshing.
For simulation, a simplified flow channel is created following the actual size of Spinhaler®.
Comparative simulation of engine cooling fan of mining dump truck based on CFD [J].Coal Mine Machinery, 2012, 12: 026