This paper describes a method to generate Delaunay tetrahedral meshes directly from regular volume data by vertex insertion driven by an error criterion. By adapting the mesh to the input data, the method produces meshes suitable for fast and precise volume ray-casting. A partitioning method that splits the mesh into homogeneous sub-meshes is also presented. Such mesh segmentation strategy turn...

There is a growing need for custom visualization applications to deal with the rising amounts of volume data to be analyzed in fields like medicine, seismology, and meteorology. Visual programming techniques have been used in visualization and other fields to analyze and visualize data in an intuitive manner. However, this additional step of abstraction often results in a performance penalty du...

The dimensionless Niyama criterion was used to predict the formation of microporosity in nickel-based superalloy casting, which extended the model application from a simple plate casting to complex thin-wall superalloy casting. The physical characteristics of the superalloy were calculated by JMatPro software. The relation between the volume percentage of microporosity and the dimensionless Niy...

Casting is considered as a major manufacturing process. Thermal analysis of a solidifying medium is of great importance for appropriate design of casting processes. The conventional governing equation of a solidifying medium is based on the Fourier heat conduction law, which does not account for the phase-lag between the heat flux and the temperature gradient. In this paper, the concept of phas...

The physical modeling method was used to study the processes of formation structure sheet blanks during ingotless casting-rolling metals. At same time, on basis theoretical analysis, main parameters are determined, with help which it is possible effectively control crystallization and blanks. studies carried out made establish regularities influence hydrodynamic thermophysical conditions pourin...

The solidification process in strip casting using a vertical-type high-speed twin-roll caster was clarified by inserting 0.1 mm diameter K-type thermocouple into during casting. roll speeds of the copper rolls were 10 m/min and 30 m/min, loads 5 kN 20 kN. Al-Si alloys with Si content 2%, 6%, 12% used to investigate influence latent heat viscosity semisolid state. temperature increased after exi...