Open Access
EDITORIAL
Di Wang1, Yongqiang Yang1,*, Yingjun Wang1,*, Li Yang2, Hao Wang3, Shoufeng Yang4
CMES-Computer Modeling in Engineering & Sciences, Vol.126, No.1, pp. 1-4, 2021, DOI:10.32604/cmes.2021.015180
（This article belongs to this Special Issue: Design & simulation in Additive Manufacturing)
Abstract This article has no abstract. More >
Open Access
ARTICLE
Liu Cao*
CMES-Computer Modeling in Engineering & Sciences, Vol.126, No.1, pp. 5-23, 2021, DOI:10.32604/cmes.2021.014693
（This article belongs to this Special Issue: Design & simulation in Additive Manufacturing)
Abstract As a typical laser additive manufacturing technology, laser powder
bed fusion (LPBF) has achieved demonstration applications in aerospace,
biomedical and other fields. However, how to select process parameters
quickly and reasonably is still the main concern of LPBF production. In
order to quantitatively analyze the inuence of different process parameters
(laser power, scanning speed, hatch space and layer thickness) on the LPBF
process, the multi-layer and multi-path forming process of LPBF was predicted based on the open-source discrete element method framework Yade
and the open-source finite volume method framework OpenFOAM. Based
on the design of experiments method, a four-factor three-level… More >
Open Access
ARTICLE
Miaomiao Yang, Wentao Ma, Yongbin Ge*
CMES-Computer Modeling in Engineering & Sciences, Vol.126, No.1, pp. 25-54, 2021, DOI:10.32604/cmes.2021.012575
Abstract In this paper, Chebyshev interpolation nodes and barycentric Lagrange interpolation basis function are used to
deduce the scheme for solving the Helmholtz equation. First of all, the interpolation basis function is applied to
treat the spatial variables and their partial derivatives, and the collocation method for solving the second order
differential equations is established. Secondly, the differential equations on a given test node. Finally, based on three kinds of test nodes, numerical experiments show that
the present scheme can not only calculate the high wave numbers problems, but also calculate the variable wave
numbers problems. In addition, the algorithm has… More >
Open Access
ARTICLE
Mushtaq Ahmad Khan1,*, Ahmed B. Altamimi2, Zawar Hussain Khan3, Khurram Shehzad Khattak3, Sahib Khan4,*, Asmat Ullah3, Murtaza Ali1
CMES-Computer Modeling in Engineering & Sciences, Vol.126, No.1, pp. 55-88, 2021, DOI: 10.32604/cmes.2021.011163
Abstract This article introduces a fast meshless algorithm for the numerical solution nonlinear partial differential equations
(PDE) by Radial Basis Functions (RBFs) approximation connected with the Total Variation (TV)-based minimization functional and to show its application to image denoising containing multiplicative noise. These capabilities
used within the proposed algorithm have not only the quality of image denoising, edge preservation but also the
property of minimization of staircase effect which results in blocky effects in the images. It is worth mentioning
that the recommended method can be easily employed for nonlinear problems due to the lack of dependence on a
mesh or… More >
Open Access
ARTICLE
Roddy A. Correa1, Juan Ramón Bermejo Higuera2, Javier Bermejo Higuera2, Juan Antonio Sicilia Montalvo2, Manuel Sánchez Rubio2, Á. Alberto Magreñán3,*
CMES-Computer Modeling in Engineering & Sciences, Vol.126, No.1, pp. 89-124, 2021, DOI:10.32604/cmes.2021.010700
Abstract This study presents a methodology to evaluate and prevent security
vulnerabilities issues for web applications. The analysis process is based on
the use of techniques and tools that allow to perform security assessments
of white box and black box, to carry out the security validation of a web
application in an agile and precise way. The objective of the methodology is to
take advantage of the synergies of semi-automatic static and dynamic security
analysis tools and manual checks. Each one of the phases contemplated in
the methodology is supported by security analysis tools of different degrees
of coverage, so that… More >
Open Access
ARTICLE
Leilei Chen1, Kunpeng Li1, Xuan Peng2, Haojie Lian3,4,*, Xiao Lin5, Zhuojia Fu6
CMES-Computer Modeling in Engineering & Sciences, Vol.126, No.1, pp. 125-146, 2021, DOI:10.32604/cmes.2021.012821
Abstract This paper presents an isogeometric boundary element method (IGABEM) for transient heat conduction analysis.
The Non-Uniform Rational B-spline (NURBS) basis functions, which are used to construct the geometry of the
structures, are employed to discretize the physical unknowns in the boundary integral formulations of the governing equations. B´ezier extraction technique is employed to accelerate the evaluation of NURBS basis functions. We
adopt a radial integration method to address the additional domain integrals. The numerical examples demonstrate
the advantage of IGABEM in dimension reduction and the seamless connection between CAD and numerical
analysis. More >
Open Access
ARTICLE
Mohamed Salmi1,2, Younes Menni3, Ali J. Chamkha4,5,*, Houari Ameur6, Rachid Maouedj7, Ahmed Youcef7
CMES-Computer Modeling in Engineering & Sciences, Vol.126, No.1, pp. 147-173, 2021, DOI:10.32604/cmes.2021.012839
Abstract The hydrothermal behavior of air inside a solar channel heat exchanger equipped with various shaped ribs is
analyzed numerically. The bottom wall of the exchanger is kept adiabatic, while a constant value of the temperature
is set at the upper wall. The duct is equipped with a flat rectangular fin on the upper wall and an upstream
V-shaped baffle on the lower wall. Furthermore, five hot wall-attached rib shapes are considered: trapezoidal,
square, triangular pointing upstream (type I), triangular pointing downstream (type II), and equilateral-triangular
(type III) cross sections. Effects of the flow rates are also inspected for various Reynolds… More >
Open Access
ARTICLE
Mohamed Abdelsabour Fahmy1,2,*
CMES-Computer Modeling in Engineering & Sciences, Vol.126, No.1, pp. 175-199, 2021, DOI:10.32604/cmes.2021.012218
Abstract The main aim of this paper is to propose a new memory dependent derivative (MDD) theory which called threetemperature nonlinear generalized anisotropic micropolar-thermoelasticity. The system of governing equations of
the problems associated with the proposed theory is extremely difficult or impossible to solve analytically due to
nonlinearity, MDD diffusion, multi-variable nature, multi-stage processing and anisotropic properties of the considered material. Therefore, we propose a novel boundary element method (BEM) formulation for modeling and
simulation of such system. The computational performance of the proposed technique has been investigated. The
numerical results illustrate the effects of time delays and kernel functions on… More >
Open Access
ARTICLE
Wasfi Shatanawi1,2,3, Ali Raza4,5,*, Muhammad Shoaib Arif4, Muhammad Rafiq6, Mairaj Bibi7, Muhammad Mohsin8
CMES-Computer Modeling in Engineering & Sciences, Vol.126, No.1, pp. 201-215, 2021, DOI:10.32604/cmes.2021.012111
Abstract Nonlinear stochastic modelling plays an important character in the different fields of sciences such as environmental, material, engineering, chemistry, physics, biomedical engineering, and many more. In the current study, we
studied the computational dynamics of the stochastic dengue model with the real material of the model. Positivity,
boundedness, and dynamical consistency are essential features of stochastic modelling. Our focus is to design
the computational method which preserves essential features of the model. The stochastic non-standard finite
difference technique is most efficient as compared to other techniques used in literature. Analysis and comparison
were explored in favour of convergence. Also, we… More >
Open Access
ARTICLE
Mengtao Cao1,2, Weiguo Liang1,2, Shunde Yin3,*, Maurice B. Dusseault4
CMES-Computer Modeling in Engineering & Sciences, Vol.126, No.1, pp. 217-239, 2021, DOI:10.32604/cmes.2021.011823
Abstract Injection-induced fracture reactivation during hydraulic fracturing processes in shale gas development as well as
coal bed methane (CBM) and other unconventional oil and gas recovery is widely investigated because of potential
permeability enhancement impacts. Less attention is paid to induced fracture reactivation during oil and gas
production and its impacts on reservoir permeability, despite its relatively common occurrence. During production,
a reservoir tends to shrink as effective stresses increase, and the deviatoric effective stresses also increase. These
changes in the principal effective stresses may cause Coulomb fracture slip in existing natural fractures, depending
on their strength, orientation, and initial stress… More >
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