Related Articles A new instrument for dynamic helical squeeze flow which superposes oscillatory shear and oscillatory squeeze flow Rev. Sci. Instrum. 83, 085105 (2012) The effects of hydrodynamic interaction and inertia in determining the high-frequency dynamic modulus of a viscoelastic fluid with two-point passive microrheology Phys. Fluids 24, 073103 (2012) MHD free convection flow of a visco...

In order to address basic questions of importance to microrheology, we study the dynamics of a rigid sphere embedded in a model viscoelastic medium consisting of an elastic network permeated by a viscous fluid. We calculate the complete response of a single bead in this medium to an external force, and compare the result to the commonly-accepted, generalized Stokes-Einstein relation (GSER). We ...

We report experimental measurements of the acoustic emission associated with the bursting of a gas bubble at the free surface of a non-Newtonian fluid. On account of the viscoelastic properties of the fluid, the bubble is generally elongated. The associated frequency and duration of the acoustic signal are discussed with regard to the shape of the bubble and successfully accounted for by a simp...

The effect of thermophoresis particle deposition on unsteady free convective, heat and mass transfer in a viscoelastic fluid along a semiinfinite vertical plate is investigated. The Walters-B liquid model is employed to simulate medical creams and other rheological liquids encountered in biotechnology and chemical engineering. The dimensionless unsteady, coupled and non-linear partial different...

This paper examines the shape dynamics of deformable elastic and viscoelastic particles in an ambient Newtonian fluid subjected to simple shear. The are allowed undergo large deformation, with stress determined using neo-Hookean constitutive relation. We first present a method determine initially ellipsoidal that is extension Roscoe ( J. Fluid Mech. , vol. 28, issue 2, 1967, pp. 273–293), origi...

A non-Newtonian fluid is a fluid whose flow properties differ in many ways from those of Newtonian fluids. Most commonly the viscosity of non-Newtonian fluids is not independent of shear rate or shear rate history. In practice, many fluid materials exhibits non-Newtonian fluid behavior such as: salt solutions, molten, ketchup, custard, toothpaste, starch suspensions, paint, blood, and shampoo e...

in this paper, changes of casson non-newtonian fluid velocity profile, for different distribution of porosity, have been investigated. for distribution of porosity, fixed, radial and exponential variations has been considered. for all three states, brinkman model has been used as momentum equation. since the casson fluid is a good model for blood, this analysis can be used in studying about cho...

In this study, the leakage of a non-Newtonian fluid, i.e. silicone oil, in generic gap was numerically investigated. A CFD tool is used to determine relationship between flow, length and pressure difference. The investigated fluid viscoelastic its properties are modelled by Maxwell equation. model can be precisely define phenomenon stress relaxation. Moreover, comparison viscosity measured data...

A computational study of oblique binary viscoelastic droplet collisions is performed. The free surface is modeled by a Lagrangian moving-mesh interface tracking method which is validated against analytical solutions and experimental data for binary Newtonian droplet collisions. Interpolation error due to cell deformation is minimized with a local topological mesh adaptation algorithm. This meth...

Transverse ridges are regions of anomalously high uplift that, run parallel to many of the transform fattits at mid-ocean ridges. Previous models of the formation of these ridges generally fail to explain the magnitude of uphft (between 1 and 8 km) or account for geophysical observations (which indicate that the ridges are dynamically uphfted by neutral or heavy, but not buoyant, material). How...