Herschel–Bulkley fluid

About: Herschel–Bulkley fluid is a research topic. Over the lifetime, 1946 publications have been published within this topic receiving 49318 citations.

Stress Distribution on a Two Phase Problem in Micro-Extrusion

Abstract: In this paper, we investigate the stress distribution on a two phase problem in micro-extrusion Molten polymer is compressed from a vessel and the extruded fluid is being solidified through the heat exchange with the solid polymer and the ambient environment resulting in a two phase/moving boundary problem The temperature profile of such problem has analytically been determined and the present author, Chan further investigates the fluid flow of the molten polymer embedded inside the condensed outer-shell In this paper, we investigate the stress distribution induced by the fluid flow, which is driven by the incoming fluid and the moving boundary We find that when x’>>H (see Fig 1), shear stress dominates whereas the principal stress dominates when x’<

Studies of the Laminar Flow of Herschel-Bulkley Fluids in Pipes

Abstract: Laboratory studies were done on the structural flow patterns of Herschel-Bulkley fluids in pipes,and computing formulae of velocity distribution,flow rate,average velocity,pressure drop and Reynolds number of the fluids were constructed.

Asymptotic Analysis of Non-Newtonian Fluid Flow in a Microchannel under a Combination of EO and MHD Micropumps

Abstract: Asymptotic solution for the shear stress distributions and velocity profiles of steady electroosmotic (EO) and magnetohydrodynamic (MHD) flows are obtained in a parallel flat plate microchannel. A fully-developed flow is considered and the fluid obeys a constitutive relation based in a simplified Phan-Thien-Tanner model. The effect of the following dimensionless parameters on the fluid flow control is predicted: the viscoelastic parameter and the Hartmann number. The momentum equation, boundary conditions and the constitutive rheological model are combined to formulating a nonlinear differential equation to solve the shear stress, which is expanded in a regular expansion series in powers of small Hartmann numbers. This limit of small Hartmann numbers and low electrical conductivity in the buffer solution correspond to the range where the electric and magnetic effects can be used to move a charged solution in the flow control and sample handling in biomedical and chemical analysis.

Stability of Natural Convection of Power-Law Fluid and non-Darcy Flow in Porous Media

Abstract: In the present work the effect of the power law exponent of power-law fluid and non-Darcy number of non-Darcy flow on stability of natural convection in porous media are studied. The computation analysis of effect of power-law exponent of power-law fluid and non-Darcy number of non-Darcy flow in the rectangular duct on the transition Rayleigh number Ra*, which means the convective model transiting from stationary state to periodic solution. The duct has filled a porous medium saturated with the power-law non-Newtonian fluid or Newtonian fluid for non-Darcy flow, in which there is uniform internal heat generation per unit volume q. In this paper the relationship between the transition Rayleigh number Ra* and the power-law exponent n, Ra* and non-Darcy number Be, are shown. To these two aspects, the transition route from steady to chaotic convection is also obtained.