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It was shown that the important parameters including the mass flow distribution of each outlets and the flow structure near the windshield and side windows could be quickly evaluated from the steady state CFD simulation results in the early design stage.
However, transient CFD simulation, considering cabin temperature distribution or phase changing, needs a lot of computational resources and time.
Based on the motivation of pre-evaluating the HVAC system performance in the early design stage, the steady state CFD simulation of a passenger car’s defrosting duct was carried out.
The whole geometry model for CFD simulation, shown in Fig. 1, consists of the defrosting duct, interior trim, seats, cabin, two front passengers and almost all the cabin accessories.
The numerical simulations were carried out using a commercial CFD code, ANSYS Fluent.

Heating of a novel field shower equipment was computational simulated by CFD software in the schematic design phase, and the correction of simulation was verified in the environment laboratory.
For the novel shower equipment, CFD (Computational Fluid Dynamics) [4] is adopted in this paper to do research on the heating in cold environment.
According to the initial and boundary conditions, the CFD software Airpak is applied to do the simulation.
Fig. 3 shows the simulation results.
CFD model of the airflow, heat and mass transfer in cool stores[J].

Methods The method used in this study was simulation with ANSYS computational fluid dynamic tool.
Fig. 1 Variations in Stirring Patterns (RUN 1, 2, 3, 4) The CFD simulation process through three stages: preprocessing, solving/solution, postprocessing.
Postprocessing is the final step in the CFD analysis.
At this step, the organizing and interpreting of the data from the CFD simulation results in the form of images and curves are implemented.
Molecular Dynamics Simulation.

We indicated the high wind speed areas for discomfort under strong wind conditions experimentally in BLWT wind tunnel and using CFD simulation.
During these tests and also in the CFD simulation, also nearby high-rise building (the main building of VUB bank) was considered.
Fig. 3 Dimensions of the cross-section of the high-rise building [mm] and positions of the pressure taps in the level C (the terrace) CFD Simulation and Obtained Results For CFD simulation, ANSYS 17.2 under Academic license was used [15].
In spite of this fact, we were limited with maximum number of elements 512 000 in CFD simulation (licence limitation).
Schlunzen, B.Carissimo, Best practice guideline for the CFD simulation of flows in the urban environment, COST Office Brussels, 2007

Application of CFD The numerical simulation of turbine internal flow field is one of the key technologies at present which implements hydraulic design of turbine using the modern design method of hydraulic turbine design, the CFD technology has considered as a main auxiliary mean in design modification[5, 6].
The design process based on CFD combined with CAD for turbine is shown in Figure 1.
The simulation results are statistical calculated; the average values of the runner main parameters inside flow are listed in Table 1.
Through the above numerical simulation analysis we can test hydraulic design and further improve the situation, and make it more efficient in accordance with the design thought.
References [1] Wang Fujun: CFD Software Principle and Application (Tsinghua University press, (2004),in Chinese

Numerical simulation studies are carried out for improvement of energy efficiency in a room by with different thermal insulating materials using computational fluid dynamics (CFD).
A multi-physical 3D model room of size 2.6 m × 2.6 m × 2.6 m is created to analyze the performance of different insulating materials using CFD simulations.
The studies are carried out using commercial CFD tool of ANSYS CFX 15.0.
Geometry and Boundary conditions A room of size 2.6 m × 2.6 m × 2.6 m is created to analyze the performance of different insulating materials using CFD simulations with door way of size 2 m height and 1 m width.
TRNSYS, A transient system simulation program, User Guide Version 15.

Numerical simulations were carried out for different flow conditions.
Many studies have been done on the CFD analysis of droplet formation in a T-junction device [1-12].
Liu and Li [7] used a steady 3D two-fluid CFD model to study the dispersed bubbly flow split phenomenon in the T-junction.
The simulation achieved good agreement with the experimental result.
Conclusion This study used a CFD model to investigate the droplet generation process in the modified T-junction device proposed by Song [1].

As we all know, it’s difficult to find the optimal layout under a certain speed in CFD simulation because sufficient time and high-level computing equipment are needed.
Therefore, We took CFD simulation results as sample and trained BP neural network.
CFD Simulation.
In other words, the numerical value of the network and CFD simulations of this group would do a comparison, and then the accuracy and reliability of the network prediction is illustrated.
One day is needed for a group resistance through CFD simulation and more time for a greater Fr.

The velocity fields obtained are compared with CFD simulations of the flow and allow the rigorous validation of numerical models.
The results obtained are compared with CFD simulations of the flow and allow the rigorous validation of numerical models.
Results and discussion PIV measurements are compared to computational results predicted by 2D axisymmetric simulations of the flow [2, 10].
This difference can be explained by the fact that the CFD simulations use a 2D axisymmetric stationary model which is unable to predict the instabilities caused by the interaction between the two primary and secondary flows.
Therefore, the PIV technique proves to be a very interesting tool for the validation of CFD simulations in supersonic ejectors.

Numerical Simulation of The Aerodynamics and Aerothermal Heating for A Hypersonic Vehicle LIU Haiyonga, Qiang Hongfub 201 Section ,Xi’an High-Tech Institute,Xi’an, China ahelian_xicheng@163.com, bQiang@263.net Keywords:Numerical simulation; Waverider; Pre-compressed surface; CFD software; Viscous model Abstract.
Numerical simulation was conducted on the two-dimensional and three-dimensional models of the vehicle using CFD software of Gambit and Fluent.
The results of simulation investigation showed that: High compressed air was constrained beneath the pre-compressed surface of the forebody.
That would be helpful to optimize the design of the hypersonic vehicle, extent the understanding of the CFD software, and improve and modify the turbulence models for suitable utilization in the simulation of hypersonic flow.
The present viscous model was suitable for aerodynamic simulation and needed be modified and improved for aerothermal heating calculation.