Vadim Dyadechko

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An advanced Volume-of-Fluid or VOFp rocedure for locally conserva-tivereconstruction of multi-materialinterfaces based on volumefraction information in cellso fa nu nstructured mesh is presented in this paper. The procedure employs improvedneighbordefinitions and topological consistency checks of the interface for computing am ore accurate interface(More)
strongly supports academic freedom and a researcher's right to publish; as an institution, however, the Laboratory does not endorse the viewpoint of a publication or guarantee its technical correctness. Abstract The purpose of the Moment-of-Fluid (MoF) technique is reconstruction of the mixed-cell material interfaces from the moment data: the volumes and(More)
— Black-box methodology for generating anisotropic adaptive tetrahedral meshes in domains with discrete boundaries is described. A new high-order reconstruction method for triangular surface meshes is proposed. The performance of the method for a model convection–diffusion problem is demonstrated. Adaptive methods greatly reduce the demand for a large(More)
ii ACKNOWLEDGMENTS First and foremost, I would like to express my sincere gratitute to my advisor, Dr. Yuri Kuznetsov. He introduced me to the field of numerical methods for partial differential equations and was guiding me from the very first steps I have taken and all the way to the completion of this research. Without his trust, instructions,(More)
layered material structure, i.e., only if the true interfaces form no junction. The new Moment-of-Fluid (MoF) technique effectively overcomes the limitations of the VoF approach by utilizing more data: in addition to the volumes, the cell-wise material centroids (the first moments) are used. In [3] we presented the two-material MoF algorithm, which locates(More)
strongly supports academic freedom and a researcher's right to publish; as an institution, however, the Laboratory does not endorse the viewpoint of a publication or guarantee its technical correctness. ABSTRACT The rezoning step is an important part of the Arbitrary Lagrangian-Eulerian (ALE) simulation cycle. The objective of the rezoning algorithm is to(More)
An important part of the Arbitrary Lagrangian-Eulerian method is the rezoning or mesh improvement step after completion of the Lagrangian step where the mesh is deformed according to the flow. A procedure is presented here to optimize the quality of elements in 3D solid meshes by node repositioning. The procedure aims to improve the quality of boundary mesh(More)