Thermomechanically coupled numerical simulation of cryogenic orthogonal cutting

numerical simulation of orthogonal cutting process and determination of built up layer thickness

the built up layer thickness in secondary deformation zone is one of the important parameters in metal cutting process. the built up layer (bul) is formed in second deformation zone near the tool-chip interface in the back of the chip. this parameter influences the tool life and machined surface quality. this bul should not be confused with the built up edge (bue). the deformation of the bul in...

Numerical Simulation of Cryogenic Injection in Rocket Engine Combustion Chambers

Numerical Simulation of Cryogenic Injection in Rocket Engine Combustion Chambers

The numerical simulation of cryogenic combustion is crucial for a better understanding of the complex physics involved in reactive flows of rocket engines and to help to reduce the development cost of these engines. The focus of this study is set on the oxidizer injection and its dispersion through jet dense core destabilization and atomization or supercritical mixing. Specific models have been...

Numerical simulation of SiGe HBT’s at cryogenic temperatures

This paper describes SCORPIO, a new one-dimensional, drift-diffusion simulator for modeling silicon-germanium heterojunction bipolar transistors (SiGe HBT's) over a wide temperature range (77400K). SCORPIO will be used to investigate fundamental low-temperature device physics problems and key device design issues. Comparisons of simulation results with experimental measurements are being used t...

Numerical Simulation of Coupled Liquid-solid Dynamics

Under micro-gravity conditions, fluid behaviour is — at least from a computational point of view — more complicated than under terrestrial conditions. Since capillary forces at the free surface dominate the flow, the location and shape of the free surface have to be computed accurately. Moreover, in an extra-terrestrial environment, fluid has the tendency to undergo large topological changes re...