We have performed surface tension measurements on carbopol gels of different concentrations and yield stresses. Our setup, based on the force exerted by a capillary bridge on two parallel plates, allows us to measure an apparent surface tension of the complex fluid and to investigate the influence of flow history. More precisely the apparent surface tension measured after stretching the bridge ...

In order to study the dynamic meshing characteristics of the elliptic cylinder gear and obtain the meshing error of the gear transmission system, the two-dimensional static contact analysis of the gear tooth surface is carried out by using ANSYS software, and the key parts of the contact area of the tooth surface are determined. Then, the dynamic meshing model of the elliptic cylinder gear is e...

Repeated exploration of a water surface to detect objects interest and their subsequent monitoring is important in search-and-rescue or ocean clean-up operations. Since the location any detected object dynamic, we propose address combined by modeling spatio-temporal reward states coordinating team vehicles collect rewards. The model characterizes dynamics enables planner predict future system s...

As the most important working area of gear, teeth play the role of transmitting load and power. Tooth line and tooth profile are the two main characteristics of the tooth surface, which affect the shape of the tooth surface, tooth meshing characteristics and contact characteristics. Taking the elliptical cylinder gear pair in the reversing device of a new type of drum pumping unit as the resear...

In mantle convection models, the top surface is traditionally approximated as a freeslip boundary, and the dynamic topography is obtained by assuming that the normal stress on the free-slip boundary is compensated instantaneously through surface deformation. It has already been shown that this approximation is valid for longwavelength topography. Based on both viscous and viscoelastic models wi...

In this study, a realistic model for dynamic instability of embedded single-walled nanotubes (SWCNTs) conveying pulsating fluid is presented considering the viscoelastic property of the nanotubes using Kelvin–Voigt model. SWCNTs are placed in longitudinal magnetic fields and modeled by sinusoidal shear deformation beam theory (SSDBT) as well as modified couple stress theory. The effect of slip ...