Abstract In the present work, a prototype was developed to observe flow behavior of viscous fluids under free surface shear and determine an adhesion energy in this geometry. The geometry consists eccentric Couette cell (outer cylinder radius 89.5 mm, inner 43.75 mm minimal gap 3 mm) that can be used two modes, where both cylinders respectively rotate same or opposite directions. Cylinders are ...

Abstract The large-scale circulation (LSC) is the most fundamental turbulent coherent flow structure in Rayleigh-Bénard convection. Further, LSCs provide foundation upon which superstructures, largest observable features convective systems, are formed. In confined cylindrical geometries with diameter-to-height aspect ratios of , LSC dynamics known to be governed by ...

We consider the Rayleigh–Bénard problem for a combustible gaseous mixture in a two-dimensional channel formed by upper and lower horizontal plates, with periodic boundary conditions employed in the horizontal direction. Fresh unburned fluid is injected through the upper plate and burned products removed through the lower plate. The lower plate is heated to the burning temperature of the mixture...

The lubrication form of the equations governing the flow of a thin liquid film on a horizontal right circular cylinder is derived. The equations are discretized and solved numerically using an alternating-direction implicit algorithm. Simulations demonstrate that the transition from a uniform coating to a final configuration of distinct drops follows a similar evolution for a wide range of cyli...

PURPOSE The aim of the present study was to evaluate the accuracy of three techniques for correction of cast implant bars. MATERIALS AND METHODS Thirty cast implant bars were fabricated on a metal master model. All cast implant bars were sectioned at 5 mm from the left gold cylinder using a disk of 0.3 mm thickness, and then each group of ten specimens was corrected by gas-air torch soldering...

Oxygen is crucial to maintain and save human life. Other than medical purposes it is widely used for manufacture of mineral water, fabrication works and other industrial activities. If adequate precautionary measures are not adopted while handling, storage or transport of oxygen cylinder or container, accidental blast may claim human life and other damage as well. The case involving three victi...

The most frequent and expensive cause category of compensable loss is manual material handling (MMH). Casting workers who handle oxygen (O2) cylinders manually are at risk for work-related musculoskeletal disorders (WMSDs). The aim of this study was to assess manual handling of O2 cylinders by casting workers and to implement ergonomic intervention to reduce the risk of musculoskeletal disorder...