Convergence of the Random Vortex Method

Composite materials like Aluminium metal matrix composite is playing a very important role in manufacturing industries e.g. automobile and aerospace industries, due to their superior properties such as light weight, low density, high specific modulus, high fatigue strength etc., In this study Aluminium(Al 6061) is reinforced with Silicon Carbide particles and fabricated by Stir Casting Technique (vortex method). The MMC rectangular bars (samples) are prepared with Al6061 and SiC (28 µ size) as the reinforced particles by weight fraction from 0%, 5%, 10%, and 15% of SiC. The microstructure analysis and Mechanical properties like Tensile Strength, Vickers Hardness and Charpy Impact Strength were investigated on prepared specimens. It is observed that the properties are increased with increasing of reinforced specimens by weight fraction.

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A circle theorem technique to handle 2-D flows around arbitrary cylinders in discrete vortex method

Journal of Wind Engineering and Industrial Aerodynamics ◽

10.1016/j.jweia.2020.104496 ◽

2021 ◽

Vol 209 ◽

pp. 104496

Author(s):

Guoqing Jin ◽

Li Zou ◽

Yichen Jiang ◽

Zhi Zong ◽

Zhe Sun

Keyword(s):

Vortex Method ◽

Discrete Vortex ◽

Discrete Vortex Method ◽

Circle Theorem

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A Fast Two-Dimensional Numerical Method for the Wake Simulation of a Vertical Axis Wind Turbine

Energies ◽

10.3390/en14010049 ◽

2020 ◽

Vol 14 (1) ◽

pp. 49

Author(s):

Zheng Yuan ◽

Jin Jiang ◽

Jun Zang ◽

Qihu Sheng ◽

Ke Sun ◽

...

Keyword(s):

Velocity Distribution ◽

Numerical Method ◽

Three Dimensional ◽

Particle Method ◽

Vortex Method ◽

Vertical Axis ◽

Two Dimensional ◽

Vertical Axis Wind Turbine ◽

Wake Effect ◽

Array Design

In the array design of the vertical axis wind turbines (VAWT), the wake effect of the upstream VAWT on the downstream VAWT needs to be considered. In order to simulate the velocity distribution of a VAWT wake rapidly, a new two-dimensional numerical method is proposed, which can make the array design easier and faster. In this new approach, the finite vortex method and vortex particle method are combined to simulate the generation and evolution of the vortex, respectively, the fast multipole method (FMM) is used to accelerate the calculation. Based on a characteristic of the VAWT wake, that is, the velocity distribution can be fitted into a power-law function, a new correction model is introduced to correct the three-dimensional effect of the VAWT wake. Finally, the simulation results can be approximated to the published experimental results in the first-order. As a new numerical method to simulate the complex VAWT wake, this paper proves the feasibility of the method and makes a preliminary validation. This method is not used to simulate the complex three-dimensional turbulent evolution but to simulate the velocity distribution quickly and relatively accurately, which meets the requirement for rapid simulation in the preliminary array design.

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