Estimate the Impact of Different Heat Capacity Approximation Methods on the Numerical Results During Computer Simulation of Solidification

Dyja, R.; Gawrońska, Elżbieta; Grosser, A.; Jeruszka, Piotr; Sczygiol, N.

doi:10.1007/978-981-10-2717-8_1

Cited by 7 publications

(8 citation statements)

References 14 publications

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“…Finite element models and meshes were created in GMSH open source 3D finite element mesh generator [19]. Numerical calculations were made using an in-house software, whose application was combined with that of TalyFEM library, an application developed previously in the literature [20,21,22], as well as using algorithms implemented in the C++ language. The finite element method facilitates the modelling of complex problems, and its wide application allows for easy adaptation of many existing computational techniques.…”

Section: Implements and Assumptionsmentioning

confidence: 99%

Selection of the Heat Transfer Coefficient Using Swarming Algorithms

Gawrońska

Dyja

Zych

et al. 2022

Acta Mechanica Et Automatica

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The article presents the use of swarming algorithms in selecting the heat transfer coefficient, taking into account the boundary condition of the IV types. Numerical calculations were made using the proprietary TalyFEM program and classic form of swarming algorithms. A function was also used for the calculations, which, during the calculation, determined the error of the approximate solution and was minimalised using a pair of individually employed algorithms, namely artificial bee colony (ABC) and ant colony optimisation (ACO). The tests were carried out to select the heat transfer coefficient from one range. Describing the geometry for a mesh of 408 fine elements with 214 nodes, the research carried out presents two squares (one on top of the other) separated by a heat transfer layer with a κ coefficient. A type III boundary condition was established on the right and left of both edges. The upper and lower edges were isolated, and a type IV boundary condition with imperfect contact was established between the squares. Calculations were made for ABC and ACO, respectively, for populations equal to 20, 40 and 60 individuals and 2, 6 and 12 iterations. In addition, in each case, 0%, 1%, 2% and 5% noise of the reference values were also considered. The obtained results are satisfactory and very close to the reference values of the κ parameter. The obtained results demonstrate the possibility of using artificial intelligence (AI) algorithms to reconstruct the IV type boundary condition value during heat conduction modelling.

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Section: Implements and Assumptionsmentioning

confidence: 99%

Selection of the Heat Transfer Coefficient Using Swarming Algorithms

Gawrońska

Dyja

Zych

et al. 2022

Acta Mechanica Et Automatica

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“…The velocity of the punch was established at 0.5 mm/s in order to maintain the quasi-static behaviour of the perforation process. Modelling and computer simulations are one of the most effective method of studying and optimizing the process or the machine construction [17]. For the FEM analyses presented in the paper the ABAQUS software was used, which is widely used in modelling different mechanical dynamic problems [18][19][20].…”

Section: Methodology Of Researchmentioning

confidence: 99%

The influence of the piercing punch profile on the stress distribution on its cutting edge

Wojtkowiak

Talaśka

2019

MATEC Web Conf.

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Modifying the piercing punch profile may have a positive effect on the belt perforation process. Using the proper shape of the tool may reduce the perforation force and improve the quality of the holes. However, complex geometry of the punch can also cause an adverse stress distribution, which leads to a faster tool wear. In the presented paper, several different piercing punch profiles were tested using FEM analyses in ABAQUS and the obtained stress distributions along its cutting edges were analyzed. For the selected group of the piercing punches, the influence of variable geometrical features (a radius of rounding, an angle of chamfering or a depth of the bowl) on the stress distribution were also shown. Based on the results, it is possible to predict how modifying the punch profile will affect the shortening of the tool life, compared to the basic flat-end cylindrical piercing punch. The following research can be useful in the design process of the punching tools used for vacuum conveyor belts perforation.

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“…The geometry models and finite element meshes were created in GMSH software. Numerical calculations were performed using the TalyFEM [18,19] library and algorithms implemented in C++. TalyFEM is a tool that uses the finite element method to simulate selected physical phenomena containing many data structures from the PETSc library, including vectors, matrices, or ready-made solvers [18,19].…”

Section: Assumptions For the Researchmentioning

confidence: 99%

Impact of input parameters on numerical calculations optimized by swarming algorithms during computer simulations of the heat conduction phenomenon

Zych¹,

Gawrońska²,

Dyja³

et al. 2022

J. Appl. Math. Comput. Mech.

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The article presents the application of swarming algorithms in heat conduction, taking into account the continuity of the boundary condition (type IV). The influence of the input parameters of the bee and ant algorithm and tessellation on the selection of the heat conduction coefficient between the casting mold and the casting in computer simulations was presented. The results were compared for two different finite element grids, a different number of individuals, and a different number of iterations. The study also considered the magnitude of the reference temperature disturbance as the input temperature for numerical calculations. The analysis showed that the relative error of reproducing the value of the thermal conductivity coefficient in the continuity condition did not exceed 1.5% of the reference value of this coefficient.

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Estimate the Impact of Different Heat Capacity Approximation Methods on the Numerical Results During Computer Simulation of Solidification

Cited by 7 publications

References 14 publications

Selection of the Heat Transfer Coefficient Using Swarming Algorithms

Selection of the Heat Transfer Coefficient Using Swarming Algorithms

The influence of the piercing punch profile on the stress distribution on its cutting edge

Impact of input parameters on numerical calculations optimized by swarming algorithms during computer simulations of the heat conduction phenomenon

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