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abuaawjh@buaa.edu.cn Keywords: Flexibility Deformation, Oscillating airfoil, Aerodynamic Forces, Numerical simulation Abstract.
The objective of investigation is to use numerical simulation obtain the effect of three different flexible deformation parameters (the maximum deforming amplitude, the phase difference between the plunging motion and the deformation motion and location of the maximum deforming) on unsteady aerodynamic performance of an airfoil with plunging and pitching motion.
In addition, other researches also study on the flexibility effect in CFD methods, e.g.
CL in different grid density From Fig.2 and Fig. 3, it was concluded that far-field boundary distance set as 40c and grid density 100*109 may be enough to use in simulation.
[6] JH Wu, D Wang, SJ Guo, “Unsteady Aerodynamics Simulation of A Flapping Wing at Low Reynolds Number”, 15th International Forum on Aeroelasticity and Structural Dynamics, Paris, French, 2011

Computer Aided Design of Coat-Hanger Die in Polymer Film Processing Kai Meng1,a, Xinhou Wang2,b and Qingguan Chen1,c 1College of Textile and Clothing Engineering, Soochow University, Suzhou 215006, China 2College of Textiles, Donghua University, Shanghai 201620, China amk2009@suda.edu.cn, bxhwang@dhu.edu.cn, cqgchen@suda.edu.cn Keywords: computer aided design; film processing; simulation; residence time distribution Abstract.
With the aid of computer simulations, coat-hanger die was designed for more uniform residence time distribution.
In this paper, the velocity field and residence time distribution in coat hanger die were obtained by the method of three dimensional computer simulations.
Computer Simulations Governing Equations.
By discretizing the governing equations according to Galerkin method, we obtained the finite element equations, which were solved by the picard iterative method based on a CFD software.

Numerical Simulation of Cavitation Flow Field in a Francis Turbine Runner with Attached Blades ZHANG Siqing1, a, MA Guohua2, b , QIAN Jing3,c 1,3 Faculty Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, 650093, China 2 Yunnan Electric Power Technology Co., LTD, Kunming, 650093, China a 363685119@qq.com, b 914234394@qq.com, c qj0117@163.com Keywords：Francis turbine; cavitation; two-phase fluid; numerical simulation; water-vapor volume fraction Abstract.
The numerical simulation of cavitation flow field in a Francis turbine runner with attached blades was conducted based on the no-slip mixture model in the Euler approach and the Singhal cavitation model.
Numerical simulation method of cavitating flows Research object and numerical approach.
Practice has proved that, RNG turbulence model has a more satisfactory results in the CFD calculations of cavitation flow field.
Since cavitation usually occurs in non-design conditions, the simulation of cavitation flow field was conducted aimed at small flow condition and large flow condition in the main operating range.

Numerical simulation Modeling Construction.
Since there is no a flow boiling model embedded in CFD software, a program based on C-language was constructed to realize effective control on the inter-phase mass transfer and physical parameters of temperature dependent variation, and so on which involve in the boiling process.
The impact of gravity on bubble length is negligible under this numerical simulation conditions, see figure.4.
Numerical simulation of growth of a vapor bubble during flow boiling of water in a microchannel[J].
Confined bubble growth during flow boiling in a mini-/micro-channel of rectangular cross-section part II: Approximate 3-D numerical simulation[J].

Simulation of Unsteady Incompressible Flow using a New Particle Method Khai-Ching Ng1, a,*, Syamimi Mohd Yusoff 2, b, Yao-Hsin Hwang3, c Tony Wen-Hann Sheu4, d and Mohd-Zamri Yusoff5, e 1,2,5Center of Fluid Dynamics (CFD), Department of Mechanical Engineering, Universiti Tenaga Nasional, Jalan IKRAM-UNITEN, 43000 Kajang, Selangor, Malaysia 3Department of Marine Engineering, National Kaohsiung Marine University, Kaohsiung 805, Taiwan 4Center for Advanced Studies in Theoretical Sciences (CASTS), National Taiwan University, Taipei, Taiwan ankching@uniten.edu.my, bshamimi@uniten.edu.my, cyhhwang@webmail.nkmu.edu.tw, dtwhsheu@ntu.edu.tw, ezamri@uniten.edu.my Keywords: MPPM, MPS, particle method, Rayleigh-Taylor instability, Atwood number Abstract.
Introduction Smoothed Particle Hydrodynamics (SPH) method, Moving Particle Semi-implicit (MPS) method and Finite-Volume Point (FVP) method are the widely-used particle methods in incompressible flow simulations [1].
Yildiz, Simulation of single mode Rayleigh-Taylor instability by SPH method, Computational Mechanics. 51:5 (2012) 699-715

This paper is focused on flow simulation in the sub channel of fuel rod assembly using code ANSYS Fluent 14, which is commercial computational fluid dynamics (CFD) code.
Pressure which is used in this simulation are just above the thermodynamic critical pressure value of CO2.
Firstly, the simulations were compared with the effect of increasing heat flux on heat transfer coefficient.
Simulation Results These are the simulation contour of heat transfer coefficient with increasing heat flux at pressure just above critical pressure 7.59 MPa.
Along with simulation contours plots of heat transfer coefficient v/s heated length are given below.

This paper describes the numerical investigation on the adsorption () of nanoparticles (NPs) scale inhibitor (SI) using Eulerian Computational Fluid Dynamics (CFD) solver ANSYS/FLUENT® based on a scaled down flow model.
The simulation were done to investigate theof normal and nano-scaled Calcium-phosphonate.
This was done by looking at the change in concentration of the SI particles throughout the simulation time.
Meanwhile, Fig. 2 shows the corresponding results when the NPs SI is considered for simulation from = 0 s to = 200 s.
Computational Fluid Dynamics Simulation of Transport and Retention of Nanoparticle in Saturated Sand Filters.

The aim of this study characterizes the impact on thermal losses of exchanging coldness and the field of temperatures in different variants of the selected element installation based on executive parametrical simulations.
Therefore in this thermal transfer research project was used a method of computing parametrical simulation, so this study could consider behaving of the designed model in many geometrical and material ways or even different inner and outer climate conditions [5].
IPE profile It was considered with surrounding climate conditions of exterior te = 30 °C, αe = 15 W·m-2·K-1 for stationary 2D thermal transfer simulation of the heat flux.
[W·m-1·K-1] (2) [W·K-1] (3) Outputs/ Results Output of simulation is projection of point thermal transmittance in accordance with the position of the metal element.
Thermal CFD Analysis of Tubular Light Guides.

The simulation result shows that the propulsive efficiency of the dual single flapping has increased 40% in comparison with the single flapping.
For being lack of some experimental data and mature theories, how to optimize the flapping parameter so as to obtain higher propulsive efficiency has become a difficult problem, in order to solve this problem, computational fluid dynamics (CFD) technology can be used.
In the paper, a numerical algorithm for unsteady flow field of low velocity with movement boundary is presented firstly, then the algorithm is validated by simulation using some examples, finally the unsteady viscous flow fields of dual flapping airfoils in tandem configurations are simulated by a Navier-Stokes Solver based on dynamic deformable hybrid meshes.
Due to 3D CFD solver is used here, the 2D grid must be extended to 3D grid along airfoil span.

Some authors[1,7] established and developed CFD model to model gas explosions in linked vessels, aiming at investigating the effect of the ignition position, the pipe diameter and the volume on linked vessel explosion.
CFD simulation of pressure piling.
Numerical simulation of gas explosions in linked vessels.