Surface cleaning using cavitation bubble dynamics is investigated numerically through modeling of bubble dynamics, dirt particle motion, and fluid material interaction. Three fluid dynamics models; a potential flow model, a viscous model, and a compressible model, are used to describe the flow field generated by the bubble all showing the strong effects bubble explosive growth and collapse have...

One of the key issues associated with the utilization of block copolymer (BCP) thin films in nanoscience and nanotechnology is control of their alignment and orientation over macroscopic dimensions. We have recently reported a method, solvent vapor annealing with soft shear (SVA-SS), for fabricating unidirectional alignment of cylindrical nanostructures. This method is a simple extension of the...

One of the main goals of the metal-mechanical industries is the reduction of the production costs through the productivity increase. In the attempt to reach this goals, many researchers have been used the hot machining method. This method consists, basically, in the heating of the work piece hundreds of degrees Celsius above room temperature with aid of an external source of heat. Thus, the red...

In this work, real-time coefficient of friction (COF) analysis, in conjunction with a new method for approximating the Sommerfeld Number, is used to determine the extent of normal and shear forces during chemical mechanical planarization (CMP) and to help identify the tribology of the system. A new parameter termed the ‘tribological mechanism indicator’ is defined and extracted from the resulti...

The purpose of this study was to compare side-by-side two different titanium screw-type implants in the maxillae of miniature pigs. The test implants had a machined and acid-etched surface (Osseotite) whereas the control implants were sandblasted and acid-etched (SLA). After 4, 8, and 12 weeks of healing, removal torque testing was performed to evaluate the shear strength of the bone-implant in...

Abstract The evolution of the Kelvin–Helmholtz instability (KHI) and magnetohydrodynamic (MHD) wave emission is investigated at shear-flow boundaries magnetized plasmas. While MHD has been suggested to be only possible during nonlinear stages, we find that there also significant KHI’s linear stages. These emitted waves may have stronger impacts than KHI surface since they can act transport ener...

Erosion of refractory lining due to flow induced wall shear stress is one among severe problems that shop floor personnel face in continuous casting tundish operation. It decreases the life and increases overall operational cost. Wall turbulent major factors erosion tundish. Inclusion generation creates surface defects may lead rejection final products. Turbulent inhibitor box (TIB) helps reduc...

AIM TO DETERMINE THE EFFICIENCY OF ERBIUM: Yttrium aluminum garnet (Er:YAG) laser with Environmental Scanning Electron Microscope (ESEM) and shear bond strength analysis as a method of recycling stainless steel orthodontic brackets and compare with other methods of recycling. MATERIALS AND METHODS Eighty samples of extracted premolar teeth bonded to SS brackets were tested for rebonded shear ...