We present a direct volume rendering algorithm to speed up volume animation for ow visualizations. Data coherency between consecutive simulation time steps is used to avoid casting rays from those pixels retaining color values assigned to the previous image. The algorithm calculates the diierential information among a sequence of 3D volumetric simulation data. At each time step the diierential ...

A finite-element model, CON2D, has been developed to simulate temperature, stress, and shape development during the continuous casting of steel, both in and below the mold. The stress model features an elastic-viscoplastic creep constitutive equation that accounts for the different responses of the liquid, semi-solid, delta-ferrite, and austenite phases. Temperature and composition-dependent fu...

version on a funder's repository at a funder's request, provided it is not made publicly available until 12 months after publication. High-pressure die casting is the preferred process for manufacturing Mg-alloy components used for numerous applications. High-pressure die casting is suitable for mass production and has the advantage of also being suitable for accurately fashioning objects of co...

GPU based ray casting has become a valuable tool for the visualization of medical image data. While the method produces highquality images, its main drawback is the high computational load. We present a novel adaptive approach to speed up the rendering. In contrast to well established heuristic methods, we use the spectral decomposition of the transfer function and the dataset to derive a suita...

For die-casting, various approaches to finding the optimal control settings and optimal mold by using a computational fluid dynamics (CFD) simulator have recently been studied and applied. However, the optimal value obtained by using a conventional CFD simulator does not consistently agree with experiment, owing to computational error. Accordingly, we analyze the problem of optimization with a ...

Abstract: Further technology improvements to complex mature processes, such as the continuous casting of steel, require a combination of careful laboratory experiments, plant trials on the commercial process, and advanced computational models. As computer power increases, computational models are able to contribute more to the understanding, design, and control of these complex processes. Fluid...

Robust and accurate control of secondary cooling is vital to the successful operation of any caster and the production of high quality products. This is especially important in thin slab casters, because high casting speed and a tight machine radius often requires carefully-prescribed temperature profiles to avoid various cracking problems. This can be achieved only by successful control of the...

In current casting factories, tilting type automatic pouring machines are often used to pour the molten metal into the mold, with the operator relying on experience, perception and repeated testing to manually determine the pouring velocity. However, seeking an optimum multistep pouring velocity through trial and error results in an enormous number of combinations and is very difficult. For thi...

Tool steel for hot working is usually used the rolls of conventional twin-roll casters aluminum alloys. In a vertical high-speed caster, copper are to rapidly solidify alloys and increase casting speed, since thermal conductivity higher than that tool steel. However, degree superiority over not clear. present study, effect roll material on strip solidification between caster was investigated by...

A novel output sensitive real-time rendering algorithm local Z-buffering for the large complex scenes is presented in this paper. A naïve algorithm is proposed at first based on decomposing a large complex scene into a low-depth complexity scene and a large depth complexity by computing a partition plane in the view space. The low and high depth complexity scenes are visualized by Zbuffering an...