Flow of power-law fluid in a partially blocked eccentric annulus

2013 ◽

Vol 807-809 ◽

pp. 2616-2619

Author(s):

Yin Qing Liu ◽

Mei Wei Wang ◽

Hai Qing Cui

Keyword(s):

Numerical Solution ◽

Rheological Properties ◽

Power Law ◽

Solution Method ◽

Cement Slurry ◽

Power Law Fluid ◽

Two Phase ◽

Numerical Solution Method ◽

Eccentric Annulus ◽

The One

The equation of the limit replacement width of the one-dimension two-phase flow of Bingham fluid replacing Power law fluid in eccentric annulus was established, the numerical solution method of the equation mentioned above was given and taking the 3 wells, such as the He 104-27 well etc for examples, the limit replacement widths of cement slurry displacing mud, whose rheological properties can be described as Bingham and Power law modles respectively, were calculated, by using the equation and the numerical solution method mentioned above, and compared with those of cement slurry displacing mud, whose rheological properties are all described as Binghanm modle.

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Modeling of yield-power-law fluid flow in an eccentric annulus with fixed horizontal cuttings bed

Energy Sources Part A Recovery Utilization and Environmental Effects ◽

10.1080/15567036.2019.1683649 ◽

2019 ◽

pp. 1-16

Author(s):

Ming Tang ◽

Lang He ◽

Richun Ma ◽

Shiming He ◽

Genghua Yao

Keyword(s):

Fluid Flow ◽

Power Law ◽

Power Law Fluid ◽

Eccentric Annulus ◽

Cuttings Bed

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Laminar natural convection of non-Newtonian power-law fluid in an eccentric annulus

Thermal Science ◽

10.2298/tsci190805424b ◽

2019 ◽

pp. 424-424

Author(s):

Oussama Benhizia ◽

Mohamed Bouzit ◽

Ahmed Dellil

Keyword(s):

Nusselt Number ◽

Natural Convection ◽

Power Law ◽

Average Nusselt Number ◽

Two Dimensional ◽

Power Law Fluid ◽

Eccentric Annulus ◽

Nusselt Numbers ◽

Laminar Natural Convection ◽

Good Agreement

This work is about studying the natural convection of two-dimensional steady state non-Newtonian power law fluid numerically. The inner cylinder was put eccentrically into the outer one. The cylinders are held at constant temperatures with the inner one heated isothermally at temperature Th and the outer one cooled isothermally at temperature Tc (Th>Tc). The simulations have been taken for the parameters 103?Ra?105, 10?Pr?103, 0.6?n?1.4, 0???0.9 and an inclination angle ? from 0? up to 90?. The average Nusselt numbers for the previous parameters are obtained and discussed numerically. The results revealed that the average Nusselt number has the highest values when n=0.6, Ra=105 at ?=0 which is a signal for the large transfer herein and has the lowest values for n=1.4, Ra=103 at ?=90? which is a signal that the transfer is by conduction more than convection. Furthermore, the increasing of eccentricity causes an increase in the Nusselt number for all the cases. Finally, the best case where we can get the best heat transfer is at ? = 0, ?=0.9 among them all. The results have compared with some precedent works and showed good agreement.

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