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Multiphysics and multiscale simulation of materials processing by meshless methods [Elektronski vir] : seminar series : March 6th, 2018Šarler, BožidarThe structure of a novel meshless solution procedure for calculation of solid and fluid mechanics problems, coupled with the electromagnetic fields, is presented. The multiphysics solution framework ... is coupled to multiple scales by incorporating the cellular automata and the phase-field concepts of microstructure evolution. The solution procedure is defined on a set of nodes which can be non-uniformly distributed. The domain and boundary of interest are divided into overlapping influence areas. On each of them, the fields are represented by the collocation with radial basis functions or by least squares approximation on a related sub-set of nodes present in the influence area. In the case of cellular automata modelling, the transition rules are defined for the states of the set of nodes in the influence area. The timestepping is performed in an explicit way. All governing equations are solved in their strong form, i.e no integrations are performed. The polygonisation is not present. The large deformation and growth problems are handled by node redistribution and activation of additional nodes, respectively. The solution procedure can be easily and efficiently adapted in node redistribution and/or refinement sense, which is of utmost importance when coping with fields exhibiting sharp gradients such as phase field variable or enthalpy in phase-change problems. Step by step benchmarking of the method is represented, followed by some large scale industrial examples such as the grain structure formation in continuous casting of steel, turbulence modelling with solidification, electromagnetic casting of aluminium alloys, etc. The results of the new approach are compared with the analytical solutions, well documented bench-mark solutions and commercial packages. The method is extremely simple to code and accurate, allowing straightforward parallelization. Besides this, the inclusion of complicated physics can be performed in a straightforward manner, reducing the development time. The coding in 2D or 3D is almost identical. Applications to several large scale industrial problems are shown, particularly in the field of thermomechanical processing of steel and aluminum alloys. A selection of 20 related representative references of the team is given.Source: University of Central Florida [Elektronski vir] : UCF : Mechanical and Aerospace Engineering (2018)Type of material - e-articlePublish date - 2018Language - englishCOBISS.SI-ID - 16502555
Author
Šarler, Božidar
Topics
brezmrežne metode |
procesiranje gradiv |
simulacija |
meshless methods |
materials processing |
simulation
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