An Experimental Investigation of Permeability Impairment Under Dynamic Flow Conditions Due to Natural Depletion in an Iranian Oilfield

We present a microfluidics platform for characterizing the growth and dissolution of barite, a common component of mineral scale, in dynamic flow conditions.

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Identification for control of suspended objects in non-Newtonian fluids

Fractional Calculus and Applied Analysis ◽

10.1515/fca-2019-0072 ◽

2019 ◽

Vol 22 (5) ◽

pp. 1378-1394 ◽

Cited By ~ 5

Author(s):

Isabela Birs ◽

Cristina Muresan ◽

Dana Copot ◽

Ioan Nascu ◽

Clara Ionescu

Keyword(s):

Newtonian Fluid ◽

Pulsatile Flow ◽

Controller Design ◽

Velocity Profiles ◽

Navier Stokes ◽

Flow Conditions ◽

Dynamic Flow ◽

Fluid Environment ◽

Flow Changes ◽

Identification For Control

Abstract This paper proposes a framework for modelling velocity profiles and suspended objects in non-Newtonian fluid environment. A setup is proposed to allow mimicking blood properties and arterial to venous dynamic flow changes. Navier-Stokes relations are employed followed by fractional constitutive equations for velocity profiles and flow. The theoretical analysis is performed under assumptions of steady and pulsatile flow conditions, with incompressible properties. The fractional derivative model for velocity and friction drag effect upon a suspended object are determined. Experimental data from such an object is then recorded in real-time and identification of a fractional order model performed. The model is determined from step input changes during pulsatile flow for velocity in the direction of the flow. Further on, this model can be employed for controller design purposes for velocity and position in pulsatile non-Newtonian fluid flow.

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Experimental investigation on the efficiency of a high side weir overflow

Water Science & Technology ◽

10.2166/wst.1999.0085 ◽

1999 ◽

Vol 39 (2) ◽

pp. 61-68 ◽

Cited By ~ 1

Author(s):

Gert Luyckx ◽

Guido Vaes ◽

Jean Berlamont

Keyword(s):

Experimental Investigation ◽

Settling Velocity ◽

Scale Model ◽

Flow Conditions ◽

Sewer System ◽

Side Weir ◽

Sewer Systems ◽

High Side ◽

Sediment Fraction

Most of the overflow structures in Flanders are ‘high side weir overflows’. For the design of these structures British guidelines are used. However, the design conditions for sewer systems in the U.K. differ from the Flemish design conditions. In Flanders, pressurised flow is in common use in the pipes of the sewer system. That is why tests have been carried out on a scale model of a high side weir overflow. The optimal dimensions are determined, using different model sediments. Also efficiency relationships have been determined. For a particular chamber geometry and particular flow conditions, the efficiency of a certain sediment fraction is only determined by the settling velocity of this fraction.

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