Brownian motion in a simple shear flow has been experimentally investigated by using a different method for observation and analysis. A number of polystyrene spheres dispersed in sheared water were tracked with a confocal scanning laser microscope, and the time dependences of their coordinates were obtained. Since in the usual mean-square displacement in the flow direction the contribution from...

We report the first direct observation of shear-induced structures in low concentration wormlike micellar solutions. The structures consist of micron-sized patches which are much larger than individual equilibrium micelles and occupy 5%–10% of the fracture area. Such morphologies are consistent with recent reports of increased light scattering under shear flow. The structures have a stippled or...

We demonstrate an unexpected connection between isotropic turbulence and wall-bounded shear flows. We perform direct numerical simulations of isotropic turbulence forced at large scales at moderate Reynolds numbers and observe sudden transitions from a chaotic dynamics to a spatially simple flow, analogous to the laminar state in wall bounded shear flows. We find that the survival probabilities...

Heyelanlar doğal afet sayılarının türlerine göre dağılımı dikkate alındığında %45 ile en sık karşılaşılan doğa olaylarıdır. Heyelan çözüm projelerinin yapılabilmesi için heyelan sırasında kayma düzleminde oluşan rezidüel dayanımı parametrelerinin gerçeğe yakın şekilde tahmin edilmesi gerekir. Söz konusu parametreler, tekrarlı direkt kesme ve halka deneyleri yapılarak tayin edilebildiği gibi, ge...

The simulation of large-strain geotechnical laboratory tests with conventional Lagrangian finite element method (FEM) techniques is often problematic due to excessive mesh distortion. multiple reversal direct shear (MRDS) test can be used measure the residual strength soils in a setting. However, modelling and generally require advanced numerical methods accommodate large strains concentrated p...

We investigate the thermal fluctuations of the colloidal gas-liquid interface subjected to a shear flow parallel to the interface. Strikingly, we find that the shear strongly suppresses capillary waves, making the interface smoother. This phenomenon can be described by introducing an effective interfacial tension that increases with the shear rate. The increase of sigma(eff) is a direct consequ...