We present the results of a combined experimental and theoretical investigation of oil droplets sliding on fibres. First, both the axisymmetric shape and the motion of a droplet on a vertical fibre are described. The motion is shown to result from a balance between the droplet weight and the viscous stresses. On a long-term range, the droplet loses some mass through coating the fibre, which dec...

A method for shape design of free-form shells under self-weight is presented, without resorting to any parametric representations. The graph surface discretized into a polyhedral with quadrilateral mesh. Membrane stresses which satisfy the equilibrium in horizontal plane are given based on Pucher’s formulation, and equation vertical direction solved. Desirable distributions thrusts boundaries c...

PURPOSE This study was conducted to optimize the interdental design (wraparound) of porcelain laminates bonded to teeth in the presence of preexisting composite fillings. MATERIALS AND METHODS A finite element model (2-dimensional mesh generated from a horizontal cross section of a maxillary incisor) was used to evaluate the effects of luting composite shrinkage and thermal changes on the str...

the aim of this study was to determine the effect of trenched zirconia bar on the von mises stress distribution of ips -empress ii core ceramics.the three-dimensional model including a three-unit bridge from the second premolar to the second molar was designed. the model was reinforced with zirconia bar (zb), zirconia bar with vertical trench (vzb) and zirconia bar with horizontal trench (hzb) ...

Six sets of particle image velocimetry (PIV) data from the bottom boundary layer of the coastal ocean are examined. The data represent periods when the mean currents are higher, of the same order, and much weaker than the wave-induced motions. The Reynolds numbers based on the Taylor microscale (Re ) are 300–440 for the high, 68–83 for the moderate, and 14–37 for the weak mean currents. The mod...

in this paper a special sandwich panel with a sinusoidal core under distributed load on upper and lower plates has been studied. by drawing free body diagrams, and using energy method and castagiliano theory the forces and moments involved in the core has been determined. then, the stresses, normal and horizontal displacements due to above forces and moments are calculated. in order to ensure t...

The calculation of the turbulent stress matrix using acoustic Doppler current profiler (ADCP) data remains a challenging problem in study geophysical flows. One ways to overcome is use system two coupled ADCP with pairs beams intersecting at certain depth. When device configuration symmetric horizontal, this setting makes it possible estimate stresses only for small range depths, close depth be...

The seismic source release by fault slip under the influence of mining is an important factor to induce rock burst. In this study, normal and reverse with different horizontal stress are constructed numerical simulation law stope dynamic response characteristics when panel through faults compared analyzed. Studies show that fault, level higher, so shear strength greater. When coal pillar small ...

Chang 8 oil deposit, developed in Hohe and Jihe oil fields at the southern Yi-Shan Slop of Ordos Basin, is regarded as a kind of typical sand reservoir formation with super-low porosity, poor permeability, strong anisotropy as well as locally natural faults and fractures. The previous studies believed that matrix reservoir has a good permeability, whereas fracture reservoir has a reverse manner...