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1

A two-layered blood flow model of Bingham type non-Newtonian fluid

Das K., Jana S.

International Journal of Applied Mechanics and Engineering

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2012

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Vol. 17, no. 1

17-26

EN

In the present paper, a two layered blood flow model through a cylindrical tube of a Bingham type non-Newtonian fluid is considered. The relative coefficients of viscosity for peripheral and core layer are determined and their nature is shown graphically for different values of the maximum hematocrit, shape parameter, etc.

2

Reynolds number effects in the flow of a Bingham electrorheological fluid between fixed surfaces of revolution

Walicka A., Falicki J.

International Journal of Applied Mechanics and Engineering

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2011

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Vol. 16, no 1

195-210

EN

Many electrorheological fluids (ERFs) as fluids with micro-structure demonstrate viscoplastic behaviours. Rheological measurements indicate that the flows of these fluids may be modelled as the flows of a Bingham fluid. Our concern in the paper is to examine the pressurized laminar flow of an ERF of a Bingham type in a narrow clearance between to fixed surfaces of revolution. In order to solve this problem the boundary layer equations are used. The Reynolds number effects (the effects of inertia forces) on pressure distribution are examined by using the averaged inertia method. Numerical examples of externally pressurized flows in the clearance between parallel disks and concentric spherical surfaces are presented.

3

Badania współczynnika strat miejscowych podczas przepływu zawiesiny lodowej przez nagłe zwężenie rury

Mika Ł.

Inżynieria i Aparatura Chemiczna

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2010

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Nr 1

73-74

PL

W pracy przedstawiono oryginalne wyniki badań doświadczalnych współczynnika strat miejscowych dla zawiesiny lodowej, o udziałach drobinek lodu 5-30%, podczas przepływu przez kilka rodzajów nagłych zwężeń rury w odniesieniu do wyników obliczeń teoretycznych. W pracy wskazano także zalecane i niezalecane zakresy liczby Reynoldsa dla przepływu zawiesiny przez nagłe zwężenia rury. W pracy pokazano także zakresy przepływu, w których wartość współczynnika strat miejscowych zależy od liczby Reynoldsa.

EN

The experimental results of resistance coefficient measurements were presented in the paper. Investigations were carried out with slurry ice flow (concentration of 5-30%) in several kinds of pipe sudden contractions. The experimental and theoretical results were compared. The recommended and not recommended Reynolds number of slurry ice flow in pipe sudden contractions based on experimental results were presented. It was shown that the flow zone defined by resistance coefficient depends on the Reynolds number.

4

The simulation of the annular flow of ERF with the inhomogeneity of electrical field strength

Bilyk V. A., Makhaniok A. A.

International Journal of Applied Mechanics and Engineering

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2003

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Vol. 8, no spec.

195-200

EN

The simulation of the annular flow of electrorheological fluid (ERF) is the actual task because this type of flow is applied to industrial devices (damper, shock absorber and etc). Rheological ERFs depend on electrical field strength. The purpose of this work is simulation of Bingham ERF flow in annular gap taking into account the inhomogeneity of electrical field strength. The results of flow curve analysis in some Bingham ERFs and own models which describe dependence between yield stress, plastic viscosity and electrical field strength have been presented. These models have been used at analytical solving of hydrodynamic problem. The obtained analytical solution allows to perform the hydrodynamic calculation of Bingham fluid flow in annular gap when yield stress and plastic viscosity depend on the inhomogeneity of electrical field strength.