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Introduction Vector field visualization plays an important role in scientific research and is widely used to analyze data originating from numerical simulations or measurements such as those of computational fluid dynamics (CFD), climate modeling, and electromagnetism.

CFD-Based-Method for Simulation of Marine-Vehicle Maneuverability[C].35thAIAA fluid Dynamics Conference and Exhibit.

The FEA simulations were carried out to study the mechanical behaviors such as the displacement of membrane for both ideal shape and modified shape using FEA software ANSYS (http://www.ansys.com).
The different fluid velocity was applied to the dome membrane, where the analysis of viscous drag force was simulated using computational fluid dynamic (CFD) software.

Zhu et al. [12] studied the effect of pendulum welding on both the shape and flow of the molten pool using CFD simulation, and then obtained the influence of various molten pool flow patterns and droplet impact positions on lack of fusion under different conditions.

However, the unpredictable nature of the hydrogen requires replacement of expensive physical experiments by computer simulations based on adequate mathematical models of the physical processes of the release, dispersion and explosion of hydrogen in the atmosphere [3-5].
Molkov, An Intercomparison Exercise on the Capabilities of CFD Models to Predict Deflagration of a Large-Scale H2-Air Mixture in Open Atmosphere // Proc. of International Conference on Hydrogen Safety.

Lu et al [2, 3] carried out some simulation experiments using a semi-closed bomb with the same inner dimensions as the actual base bleed unit, to study the combustion destabilization characteristics of BBU under rapid depressurization.
As soon as the exhaust nozzle is opened, the transient depressurization arises, and the pressure outlet condition is p=p(t) (6) Numerical Simulation Results The internal flow characteristics in the BBU simulator can be simulated using the CFD software.
Tab. 1 Parameters of base bleed charge and combustion gas Parameter ρc/kg·m-3 λc/W·(m·K) -1 Cc/J·(kg·K)-1 b/m·(Pan·s)-1 n Tg/K Rg/J/(kg·K)-1 γ Value 1370 0.46 1450 8.51×10-7 0.572 1812 397 1.283 Comparison of simulation and experimental results.
These three simulations had the same initial condition.
Guo, in: Exterior Ballistics of Base Bleed Projectile, editied by National Defense Industry Press, Beijing (1995), in Chinese [2] C Y Lu, Y H Zhou, Y G Yu: Chinese Journal of Energetic Materials, Vol. 15, No. 6 (2007), p. 587, in Chinese [3] C Y Lu, Study on Characteristics of Unstable Combustion of Base Bleed Unit, edited by Doctoral Disseratation of Nanjing University of Science and Technology (2009), in Chinese [4] X S Wu, J Chen, D Wang, et al, in: Numerical Simulation of Working Process of Solid Rocket Engine, editied by High Education Press, Beijing (2006), in Chinese [5] K K Kuo, M Summerfield, in: Fundamentals of Solid Propellant Combustion, traslated by R G Zhu, G J Yu, M L Lian, et al, edited by China Astronautics Press, Beijing (1994), in Chinese

Keywords: ingot casting, flow simulation, continuous casting, low dross.
In recent years, there has been considerable improvement in commercial CFD software to enable simulation of moving objects in flow fields [3, 4] such as FLOW-3D [5].
In all simulations, only the second or middle spout of the CASTfill model fully passed under the feed launder tip.
Whereas the forming of bubbles as a result of jetting was observed in casting trials, this phenomenon was not predicted in simulations.
This is contrary to the simulation results shown in Figs. 4a and 4b.

Based on the systematic analysis of main compositions of aviation kerosene RP-3, by adopting group average in molecular weight, a kind of RP-3 surrogate fuel is proposed in the paper, and its physical property is calculated through the Extended Corresponding States and compares it with the existing experimental data of physical property, finally, the CFD commercial software is used to make the simulation verification of experimental model of flow heat transfer in vertical pipe in the reference[6] and a set of flow heat transfer characteristics under typical working conditions is discussed, the affects of the physical property change, buoyancy and turbulent kinetic energy upon the flow heat transfer is analyzed.
In the experiments, wall is heated by electricity; it can be regarded as homogeneous internal heat source during numerical simulation, outside wall of tube is heat insulation.
The contrast between numerical simulation results and experimental data is shown in Figure 6.
Figure 6 Contrast between experiment data and calculated data of outside wall temperature From figure 6, it can be seen that numerical simulation of flow heat transfer in vertical pipe can not only reflect the change trend of wall temperature, also meet the engineering requirements in the numerical accuracy and the maximum error is no more than 10%, the accuracy of the property model and calculation method is validated.

Fig. 9 Influence of Rayleigh number on the average Sherwood number and average Nusselt number Conclusions In this paper, a numerical simulation of heat and mass transfer was developed in a two-dimensional horizontal space annulus, situated within two horizontal confocal elliptic cylinders.
Numerical simulation of double diffusive natural convection in a vertical rectangular enclosure.
Numerical simulation of unsteady double-diffusive natural convection within an inclined parallelepipedic enclosure.
Lattice Boltzmann Simulation of Natural Convection around a Horizontal Elliptic Cylinder Inside a Square Enclosure.
CFD Letters, 14(3), 96-118 [22] A.

Thermodynamic Model Developing A one-dimensional, one-zone thermodynamic model developed and calibrated by authors over the years in processes simulations was used for mathematical simulation in order to study the vaporization and combustion processes of fuel drops inside the cylinder of a diesel engine fuelled with diesel fuel and LPG.
Teichmann, Internal Combustion Engines Fundamentals: Running, Simulation, Measuring, Springer, Germany, 2011 [6] M.
Boulouchos, Influence of Injector Diameter (0.2-1.2 mm range) on Diesel Spray Combustion: Measurements and CFD Simulations, SAE Technical Paper 1419 (2014)