Open Access
ARTICLE
Arka Das1, Anthony Khoury1, Eduardo Divo1, *, Victor Huayamave1, Andres Ceballos2, Ron Eaglin2, Alain Kassab3, Adam Payne4, Vijay Yelundur4, Hubert Seigneur5
CMES-Computer Modeling in Engineering & Sciences, Vol.122, No.3, pp. 757-777, 2020, DOI:10.32604/cmes.2020.08164
Abstract This paper presents a numerical reduced order model framework to simulate the
physics of the thermomechanical processes that occur during c-Si photovoltaic (PV) cell
fabrication. A response surface based on a radial basis function (RBF) interpolation
network trained by a Proper Orthogonal Decomposition (POD) of the solution fields is
developed for fast and accurate approximations of thermal loading conditions on PV cells
during the fabrication processes. The outcome is a stand-alone computational tool that
provides, in real time, the quantitative and qualitative thermomechanical response as a
function of user-controlled input parameters for fabrication processes with the precision of
3D finite… More >
Open Access
ARTICLE
Chen Yu1, Qifu Wang1, ∗, Chao Mei1, Zhaohui Xia1
CMES-Computer Modeling in Engineering & Sciences, Vol.122, No.3, pp. 779-803, 2020, DOI:10.32604/cmes.2020.09363
（This article belongs to this Special Issue: Recent Developments of Isogeometric Analysis and its Applications in Structural Optimization)
Abstract This paper proposes a multiscale isogeometric topology optimization
(ITO) method where the configuration and layout of microstructures are optimized
simultaneously. At micro scale, a shape deformation method is presented to transform
a prototype microstructure (PM) for obtaining a series of graded microstructures (GMs),
where microstructural skeleton based on the level set framework is applied to retain
more topology features and improve the connectability. For the macro scale calculation,
the effective mechanical properties can be estimated by means of the numerical
homogenization method. By adopting identical non-uniform rational basis splines
(NURBS) as basis functions for both parameterized level set model and… More >
Open Access
ARTICLE
Zaiguo Fu1, *, Huanhuan Gao1, Zhuoxiong Zeng1, Jiang Liu1
CMES-Computer Modeling in Engineering & Sciences, Vol.122, No.3, pp. 805-830, 2020, DOI:10.32604/cmes.2020.08825
（This article belongs to this Special Issue: Advances in Modeling and Simulation of Complex Heat Transfer and Fluid Flow)
Abstract In order to comprehensively evaluate the flow and heat transfer performance
of a large-size annular combustion chamber of a heavy-duty gas turbine, we carried out
numerical computation and analyses on the velocity, temperature and pressure fields in
the chamber with double swirlers. The mathematical model of the coupling combustion,
gas flow, and heat transfer process was established. The influences of the inlet swirling
strength, fuel-air ratio and temperature of the premixed gas on the multi-field
characteristics and synergy were investigated on the basis of field synergy theory. The
results showed that the central recirculation zone induced by the inlet swirling… More >
Open Access
ARTICLE
M. Al-Saad1, C. A. Suarez2, 4, A. Obeidat2, S. P. A. Bordas1, 2, 3, *, S. Kulasegaram1
CMES-Computer Modeling in Engineering & Sciences, Vol.122, No.3, pp. 831-862, 2020, DOI:10.32604/cmes.2020.08527
Abstract Thrombosis plays a crucial role in atherosclerosis or in haemostasis when a
blood vessel is injured. This article focuses on using a meshless particle-based Lagrangian
numerical technique, the smoothed particles hydrodynamic (SPH) method, to study the
flow behaviour of blood and to explore the flow parameters that induce formation of a
thrombus in a blood vessel. Due to its simplicity and effectiveness, the SPH method is
employed here to simulate the process of thrombogenesis and to study the effect of various
blood flow parameters. In the present SPH simulation, blood is modelled by two sets of
particles that have the… More >
Open Access
ARTICLE
M. Sujith1, *, S. Padma2
CMES-Computer Modeling in Engineering & Sciences, Vol.122, No.3, pp. 863-888, 2020, DOI:10.32604/cmes.2020.08908
Abstract This paper proposes the optimum controller for shunt active filter (SAF) to
mitigate the harmonics and maintain the power quality in the distribution system. It consists
of shunt active filter, Voltage Source Inverter (VSI), series inductor and DC bus and nonlinear load. The proposed hybrid approach is a combination of Particle Swarm
Optimization (PSO) and Artificial Neural Network (ANN) termed as PSOANN. The PI
controller gain parameters of kp and ki are optimized with the help of PSOANN. The
PSOANN improves the accuracy of tuning the gain parameters under steady and dynamic
load conditions; thereby it reduces the values of… More >
Open Access
ARTICLE
Lihua Wang1, *, Wenjing Ye1, Yueting Zhou1
CMES-Computer Modeling in Engineering & Sciences, Vol.122, No.3, pp. 889-906, 2020, DOI:10.32604/cmes.2020.09013
Abstract The lift force was reported not to be high enough to support the dragonfly’s
weight during flight in some conventional investigations, and higher lift force is required
for its takeoff. In this study, by employing a thin plate model, impact effect is investigated
for the wing deformation in dragonfly flapping during takeoff. The static displacement is
formulated to compare with the dynamical displacement caused by impact. The governing
equation of motion for the impact dynamics of a dragonfly wing is derived based on
Newton’s second law. Separation of variables technique and assumed modes method are
introduced to solve the resulting… More >
Open Access
ARTICLE
M. F. Elettreby1, 2, *, Tamer Nabil1, 3, A. Khawagi4
CMES-Computer Modeling in Engineering & Sciences, Vol.122, No.3, pp. 907-921, 2020, DOI:10.32604/cmes.2020.08664
Abstract In this paper, a discrete Lotka-Volterra predator-prey model is proposed that
considers mixed functional responses of Holling types I and III. The equilibrium points of
the model are obtained, and their stability is tested. The dynamical behavior of this model
is studied according to the change of the control parameters. We find that the complex
dynamical behavior extends from a stable state to chaotic attractors. Finally, the analytical
results are clarified by some numerical simulations. More >
Open Access
ARTICLE
Yihua Xiao1, *, Hecheng Wu1, Xuecheng Ping2, *
CMES-Computer Modeling in Engineering & Sciences, Vol.122, No.3, pp. 923-954, 2020, DOI:10.32604/cmes.2020.07686
Abstract Ceramics are extensively used in protective structures which are often
subjected to projectile impacts. During an impact process of a ceramic target by a
projectile, fragmentation occurs in both the target and the projectile. It is challenging to
simulate such events and predict residual mass and velocity of the projectile. In this work,
we attempt to use smoothed particle hydrodynamics (SPH) in LS-DYNA to reproduce
fragmentation of the target and the projectile and predict residual mass and velocity of the
projectile during a projectile impact of a ceramic target. SPH models for an alumina
ceramic tile impacted by a blunt… More >
Open Access
ARTICLE
Ping Lou1, 2, ∗, Xinlei Zhang1, F. T. K. Au3, Zixian Zhang1, Yi Huang1
CMES-Computer Modeling in Engineering & Sciences, Vol.122, No.3, pp. 955-969, 2020, DOI:10.32604/cmes.2020.08302
Abstract Discretising a structure into elements is a key step in finite element (FE)
analysis. The discretised geometry used to formulate an FE model can greatly affect
accuracy and validity. This paper presents a unified dimensionless parameter to generate
a mesh of cubic FEs for the analysis of very long beams resting on an elastic foundation.
A uniform beam resting on elastic foundation with various values of flexural stiffness and
elastic supporting coefficients subject to static load and moving load is used to illustrate
the application of the proposed parameter. The numerical results show that (a) Even if the
values of… More >
Open Access
ARTICLE
Roberto Bellas1, *, Javier Martínez1, Ignacio Rivera2, Ramón Touza2, Miguel Gómez1, Rafael Carreño1
CMES-Computer Modeling in Engineering & Sciences, Vol.122, No.3, pp. 971-995, 2020, DOI:10.32604/cmes.2020.07530
（This article belongs to this Special Issue: Numerical Modeling and Simulation for Structural Safety and Disaster Mitigation)
Abstract The study of emergency evacuation in public spaces, buildings and large ships
may present parallel characteristic in terms of complexity of the layout but there are also
significant differences that can hindering passengers to reach muster stations or the
lifeboats. There are many hazards on a ship that can cause an emergency evacuation, the
most severe result in loss of lives. Providing safe and effective evacuation of passengers
from ships in an emergency situation becomes critical. Recently, computer simulation has
become an indispensable technology in various fields, among them, the evacuation
models that recently evolved incorporating human behavioral factors. In… More >
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