Wall Slip Corrections for Couette and Parallel Disk Viscometers

Yoshimura, Ann S.; Prud'homme, Robert Krafft

doi:10.1122/1.549963

Cited by 484 publications

(265 citation statements)

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“…But these structural changes for the material at rest imply a decrease of the fluidity at the wall, as opposed to the enhancement that is experimentally observed by Goyon 39 and Géraud 46 at high enough stresses, i.e., where the largest deviations occur. Alternatively, the specific behaviour at the wall is often rationalised by the existence of a depleted 'lubrication layer' close to the wall, as is often found in sheared dispersions [60][61][62][63][64][65][66] . This phenomenon is more acute for deformable particles 62 undergoing high shear rates and/or high shear gradients; it generates an apparent wall slip.…”

Section: Physical Effect Of Rough Wallsmentioning

confidence: 99%

A mesoscopic model for the rheology of soft amorphous solids, with application to microchannel flows

Nicolas

Barrat

2013

Faraday Discuss.

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We study a mesoscopic model for the flow of amorphous solids. The model is based on the key features identified at the microscopic level, namely periods of elastic deformation interspersed with localised rearrangements of particles that induce long-range elastic deformation. These long-range deformations are derived following a continuum mechanics approach, in the presence of solid boundaries, and are included in full in the model. Indeed, they mediate spatial cooperativity in the flow, whereby a localised rearrangement may lead a distant region to yield. In particular, we simulate a channel flow and find manifestations of spatial cooperativity that are consistent with published experimental observations for concentrated emulsions in microchannels. Two categories of effects are distinguished. On the one hand, the coupling of regions subject to different shear rates, for instance,leads to finite shear rate fluctuations in the seemingly unsheared "plug" in the centre of the channel. On the other hand, there is convincing experimental evidence of a specific rheology near rough walls. We discuss diverse possible physical origins for this effect, and we suggest that it may be associated with the bumps of particles into surface asperities as they slide along the wall.

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Section: Physical Effect Of Rough Wallsmentioning

confidence: 99%

A mesoscopic model for the rheology of soft amorphous solids, with application to microchannel flows

Nicolas

Barrat

2013

Faraday Discuss.

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“…The non-adherence of the fluid to a solid boundary is known as velocity slip. It is a phenomenon that has been observed under certain circumstances [31]. In many engineering applications, the particle adjacent to a solid surface no longer takes the velocity of the surface.…”

Section: Introductionmentioning

confidence: 99%

Role of Slip Velocity in a Magneto-Micropolar Fluid Flow from a Radiative Surface with Variable Permeability: A Numerical Study

Sharma¹,

Tailor

Goyal

2017

International Journal of Applied Mechanics and Engineering

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An analysis is presented to describe the hydromagnetic mixed convection flow of an electrically conducting micropolar fluid past a vertical plate through a porous medium with radiation and slip flow regime. A uniform magnetic field has been considered in the study which absorbs the micropolar fluid with a varying suction velocity and acts perpendicular to the porous surface of the above plate.The governing non-linear partial differential equations have been transformed into linear partial differential equations, which are solved numerically by applying the explicit finite difference method. The numerical results are presented graphically in the form of velocity, micro-rotation, concentration and temperature profiles, the skin-friction coefficient, the couple stress coefficient, the rate of heat and mass transfers at the wall for different material parameters.

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“…In our research, we used the method outlined by Yoshimura and Prud'homme 87,88 to analyze wall-slip effects. Two assumptions were made when using this method: 1) that wall layer thickness was small compared to the viscometer gap, and 2) that slip velocity was only a function of stress once steady state was achieved.…”

Section: Rheology Measurementsmentioning

confidence: 99%

Aperture-Tolerant, Chemical-Based Methods to Reduce Channeling

Seright¹

2007

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DEDICATIONThis report is dedicated to Dr. Jerry Casteel, who recently retired after many years of government service. During his time with the DOE's National Petroleum Technology Office, Jerry consistently played an extremely constructive part in overseeing our research. While our government is often criticized for wasteful spending and flighty funding of ill-considered projects, Jerry was a great role model, illustrating the very best of our public servants. Being highly competent (both technically and managerially), he provided a voice of moderation and charted a steady long-term course for solving some of the nation's most difficult energy problems. We will miss his insights, his vision, his dedication to advancing petroleum engineering, and his friendship.iii ABSTRACT This final technical progress report describes work performed from October 1, 2004, through May 16, 2007, for the project, "Aperture-Tolerant, Chemical-Based Methods to Reduce Channeling."We explored the potential of pore-filling gels for reducing excess water production from both fractured and unfractured production wells. Several gel formulations were identified that met the requirements-i.e., providing water residual resistance factors greater than 2,000 and ultimate oil residual resistance factors (F rro ) of 2 or less. Significant oil throughput was required to achieve low F rro values, suggesting that gelant penetration into porous rock must be small (a few feet or less) for existing pore-filling gels to provide effective disproportionate permeability reduction. Compared with adsorbed polymers and weak gels, strong pore-filling gels can provide greater reliability and behavior that is insensitive to the initial rock permeability.Guidance is provided on where relative-permeabiliy-modification/disproportionate-permeabilityreduction treatments can be successfully applied for use in either oil or gas production wells. When properly designed and executed, these treatments can be successfully applied to a limited range of oilfield excessive-water-production problems.We examined whether gel rheology can explain behavior during extrusion through fractures. The rheology behavior of the gels tested showed a strong parallel to the results obtained from previous gel extrusion experiments. However, for a given aperture (fracture width or plate-plate separation), the pressure gradients measured during the gel extrusion experiments were much higher than anticipated from rheology measurements. Extensive experiments established that wall slip and first normal stress difference were not responsible for the pressure gradient discrepancy. To explain the discrepancy, we noted that the aperture for gel flow (for mobile gel wormholing through concentrated immobile gel within the fracture) was much narrower than the width of the fracture.The potential of various approaches were investigated for improving sweep in parts of the Daqing Oil Field that have been EOR targets. Possibilities included (1) gel treatments that are directed at channeling through fractures,...

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Wall Slip Corrections for Couette and Parallel Disk Viscometers

Cited by 484 publications

References 0 publications

A mesoscopic model for the rheology of soft amorphous solids, with application to microchannel flows

A mesoscopic model for the rheology of soft amorphous solids, with application to microchannel flows

Role of Slip Velocity in a Magneto-Micropolar Fluid Flow from a Radiative Surface with Variable Permeability: A Numerical Study

Aperture-Tolerant, Chemical-Based Methods to Reduce Channeling

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