In this work, a transition process in hypersonic flow over cold-wall compression ramp is studied using direct numerical simulation (DNS) and global stability analysis (GSA). The free-stream Mach number the Reynolds based on flat-plate length are 7.7 $8.6 \times 10^5$ , respectively. shock-induced pressure rise causes boundary layer to separate flat plate, forming separation bubble around corner...

In the hot compression test friction has a detrimental influence on the flow stress through the process and therefore, correcting the deformation curve for real behavior is very important for both researchers and engineers. In this study, a series of compression tests were simulated using Abaqus software. In this study, it has been employed the Taguchi method to design experiments by the factor...

An analysis of delamination for a thin elastic film, attached to a substrate a corner, is carried out. The film is in compression and the analysis is performed by combining results from fracture mechanics and the theory of thin shells. The results show a very strong dependency of the angle of the corner. In contrast with earlier results for delamination on a flat substrate, the present problem ...

This chapter explores how to efficiently design circuits accounting for statistical process variation, with target yields of two to three sigma (95–99.86 %). This yield range is appropriate for typical analog, RF, and I/O circuits. This chapter reviews various design flows to handle statistical process variations, and compares these flows in terms of speed and accuracy. It shows how a sigma-dri...

Asymptotic solutions are presented for Stokes flow near circular rims in three dimensional geometries. Using nonstandard toroidal coordinates, asymptotic analytical expressions are derived for different corner angles. In comparison to the two-dimensional case, an extra critical corner angle value is derived, below which the swirling behavior of a particle is absent. Illustrations of the motion ...