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The laminar flow in annulus was analyzed by different researchers to predict the flow properties such as the pressure drop, velocity profilesetc. These analyses were used to predict capsule flow performance in hydraulic capsule pipeline systems. Govier and Aziz (1972) presented an overview, general theoretical and experimental analysis for ...
An analysis is presented of fully developed laminar flow in an eccentric annulus. An exact solution for the velocity distribution is presented. From this solution may be obtained expressions for local shear stress on the inner and outer surfaces of the annulus, friction factors based on the inner and outer surfaces, and the overall friction factor.
The laminar flow in annulus was analyzed by different researchers to predict the flow properties such as the pressure drop, velocity profilesetc. These analyses were used
2/7/2019 Made by faculty at the University of Colorado Boulder, Department of Chemical Biological Engineering.
The equation of motion has been solved for steady axial, laminar, isothermal flow of an Ellis model fluid in a conduit of annular cross section. Tables are presented which may be used to obtain flow curves for annular flow of fluids whose Ellis parameters are known.
Laminar fluid flow and heat transfer: A. K. Agrawal and S. Sengupta r r2=l- h ~ u t -, B C -~Z Figure 1 Geometric representation of an annulus with externally enhanced inner tube Vorticity transport equation
4/1/2019 The experimental studies on laminar flow of YPL and PL fluids in the eccentric annulus (circular wellbore) were conducted by Ahmed (2005) at the University of Tulsa (Ahmed, 2005). The aqueous of the Xanthan Gum (XCD) and Polyanionic Cellulose (PAC) with the different weight concentration was used as the test fluid.
9/29/2010 RE: laminar flow in an annulus zdas04 (Mechanical) 29 Sep 10 15:23 I've used the Petroleum technique on 1.5 inch OD coiled tubing in 2-3/8 tubing (ID 1.996) which works out to 1.08 inch equivilant diameter and it represented measured data very well.
The problem of laminar flow in an annulus is similar in nature to that of the laminar flow between parallel plates with the main variance being that the flow is wrapped around the inner cylinder and best solved with cylindrical coordinates. This problem has many real world applications such as the flow in an oil well, inside a Liebig condenser ...
(6.15) could lead one to conclude that there was a greater indication of laminar flow (smaller R e) in the bottom hole assembly (BHA) -by-hole annulus than in the drill pipe-by-hole one, a counterintuitive result of the flow becoming more laminar as the cross-sectional area decreased.
Laminar fluid flow and heat transfer: A. K. Agrawal and S. Sengupta r r2=l- h ~ u t -, B C -~Z Figure 1 Geometric representation of an annulus with externally enhanced inner tube Vorticity transport equation
The equation of motion has been solved for steady axial, laminar, isothermal flow of an Ellis model fluid in a conduit of annular cross section. Tables are presented which may be used to obtain flow curves for annular flow of fluids whose Ellis parameters are known.
@article{osti_6776096, title = {Laminar flow of non-newtonian fluids in an eccentric annulus}, author = {Guckes, T L}, abstractNote = {Esso Production Research Co. developed a technique for predicting the volumetric flow rate and velocity distribution for laminar flow of power-law and Bingham-plastic fluids in an eccentric annulus. This flow situation occurs during drilling of cementing of oil ...
The velocity profile for laminar flow in an annulus is given by . where Δp/L=-10 kPa/m is the pressure gradient, μ is the viscosity (SAE 10 oil at 20°C), and Ro=5 mm and Ri=1 mm are the outer and inner radii.
6/15/2004 When certain restrictions are applied to the radial component of flow it is possible to obtain an exact solution to the Navier‐Stokes equations describing the steady‐state flow of an incompressible fluid in an annulus having porous walls. The effects of such restricted radial flows on the characteristics of the flow field have been examined.
The numerical procedure was verified by comparing calculations with previously published results for the special cases of Newtonian flow in an eccentric annulus and non-Newtonian flow in a concentric annulus and with limited experimental data for Bingham-plastic flow in an eccentric annulus.
@article{osti_253688, title = {Fluid flow in a skewed annulus}, author = {Haci, M and Cartalos, U}, abstractNote = {A novel, realistic treatment of annular flow in an oil well is developed. The fluid flow in an annulus with an inclined or S-shaped inner pipe is considered. The model covers laminar and turbulent flow regimes and the results are experimentally verified.
8/1/2008 More specifically, experimental data for laminar flow in concentric annulus, presented by Fordham et al. (1991), Okafor and Evers (1992) and Hansen et al. (1999) will be used for laminar flow. Similarly, controlled field data provided by Langlinais et al. (1983) will be used to cover all three flow regime types, laminar, transitional and ...
Fully developed laminar, transitional and turbulent flow of a Newtonian fluid in an annulus of diameter ratio 0.0415 was investigated. Measurements were made of the axial pressure gradient, turbulence intensity, velocities, location of the point of maximum velocity. A range of Reynolds numbers (based on the diameter difference and mass flow rate) from 750 to 130,000 was covered.
Flow through an annulus Use Cylindrical Coordinates, which are the natural coordinates for the descripion of position in a tube. Consider a steady state laminar flow of a fluid of constant density p in a long tube of lenght L and radius R (assume L >>R and ignore end effects). Shell of thickness ∆r and lenght L, considering z as the flow ...
Flow through an annulus Use Cylindrical Coordinates, which are the natural coordinates for the descripion of position in a tube. Consider a steady state laminar flow of a fluid of constant density p in a long tube of lenght L and radius R (assume L >>R and ignore end effects). Shell of thickness ∆r and lenght L, considering z as the flow ...
The equation of motion has been solved for steady axial, laminar, isothermal flow of an Ellis model fluid in a conduit of annular cross section. Tables are presented which may be used to obtain flow curves for annular flow of fluids whose Ellis parameters are known.
6/15/2004 When certain restrictions are applied to the radial component of flow it is possible to obtain an exact solution to the Navier‐Stokes equations describing the steady‐state flow of an incompressible fluid in an annulus having porous walls. The effects of such restricted radial flows on the characteristics of the flow field have been examined.
8/1/2008 More specifically, experimental data for laminar flow in concentric annulus, presented by Fordham et al. (1991), Okafor and Evers (1992) and Hansen et al. (1999) will be used for laminar flow. Similarly, controlled field data provided by Langlinais et al. (1983) will be used to cover all three flow regime types, laminar, transitional and ...
The numerical procedure was verified by comparing calculations with previously published results for the special cases of Newtonian flow in an eccentric annulus and non-Newtonian flow in a concentric annulus and with limited experimental data for Bingham-plastic flow in an eccentric annulus.
Flow in an Annulus - IIT Bombay. 2004-5-26 At a particular κ, observe the laminar and turbulent flow in an annulus and determine the critical Reynolds number for transition from laminar to turbulent. 3. For the κ in part 2, relate the friction factor and the Reynolds number for flow in annulus. Theory
annulus with negligible heat transfer. The fully developed laminar-, transition-, and turbulent-flow cases have been investigated extensively for various annulus configurations.^ However, there exists a definite scarcity of research on constant-area annulus-inlet flow. The author could find no evidence of previous research, either experimental or
5/1/2002 Laminar flow of power law fluid foods in concentric annuli. Journal of Food Engineering 1996, 30 (3-4) , 255-262. DOI: 10.1016/S0260-8774(96)00034-9. Philip K. L. Tan, Carlos Tiu. Velocity profiles of viscoelastic fluids at the inlet of an annulus. AIChE Journal 1980, 26 (1) , 162-165. DOI: 10.1002/aic.690260130.
The Canadian Journal of Chemical Engineering, published by Wiley on behalf of The Canadian Society for Chemical Engineering, is the forum for publication of high quality original research articles, new theoretical interpretation or experimental findings and critical reviews in the science or industrial practice of chemical and biochemical processes.
The equations derived above are valid only for laminar flow. The laminar—turbulent transition occurs in the neighborhood of Re = 2000, with the Reynolds number defined as Re = 2R(1 - FLOW OF TWO ADJACENT IMMISCIBLE FLUIDSI Thus far we have considered flow situations with solid—fluid and liquid—gas boundaries. We now give one example of a ...
Laminar Flow in an Annulus With Arbitrary Time-Varying Pressure Gradient and Arbitrary Initial Velocity Satya Prakash. Satya Prakash Department of Mathematics, Birla Institute of Technology and Science, Pilani, Rajasthan, India. Search for other works by this author on: This Site.
5/1/2002 Laminar flow of power law fluid foods in concentric annuli. Journal of Food Engineering 1996, 30 (3-4) , 255-262. DOI: 10.1016/S0260-8774(96)00034-9. Philip K. L. Tan, Carlos Tiu. Velocity profiles of viscoelastic fluids at the inlet of an annulus. AIChE Journal 1980, 26 (1) , 162-165. DOI: 10.1002/aic.690260130.
An analysis is presented for the steady laminar flow of an incompressible Newtonian fluid in an annulus between two concentric porous spheres with injection/suction at their boundaries. The inner sphere rotates with constant angular velocity about its own fixed axis, while the outer sphere is stationary.
Axial laminar flow in an eccentric annulus: An approximate solution
Refer to the law of laminar flow given in Example 7. Consider a blood vessel with radius 0.01 cm, length 3 cm, pressure difference $ 3000 dynes/cm^2, $ and viscosity $ \eta = 0.027. $ (a) Find the velocity of the blood along the centerline $ r = 0, $ at radius $ r = 0.005 cm, $ and at the wall $ r = R = 0.01 cm. $
Abstract: Laminar forced convection in a double-pipe heat exchanger is studied numerically. In this study, an isothermal tube with periodic enhancements (promoters) is placed concentrically inside an isulated circular tube. Pressure drop and heat transfer characteristics of promoters are obtained at various geometric and flow condtions.
Axial Flow an overview ScienceDirect Topics. The laminar axial flow of Bingham plastic fluids through a concentric annulus has generated even more interest than that for the power-law fluids, e.g., see Laird (1957), Fredrickson and (1958), et al. (1983) and Fordham et al. (1991).
11/25/2014 here's the more details about problem.There is a double pipe that hot water by turbulent flow goes through the inner tube and cold water by the laminar flow goes through annulus (between outer tube and inner tube) and heat transfers between two fluids now i want to model this by fluent and wanted to know how to choice viscous model for each region of fluid.
A numerical simulation of the steady two-dimensional laminar natural convection heat transfer for the gaseous low-pressure flows in the annulus region between two concentric horizontal cylinders is carried out. This type of flow occurs in “evacuated” solar collectors and in the receivers of the solar parabolic trough collectors.
9/16/2005 Flow through an annulus is more complicated than flow through an orifice so empiraical data seems to be needed. This is discussed in Lenkei,A. (1965), "Close Clearance Orifices", Product Engineering, 4/26/65. pp. 57-61. Empirical data from one or more of 5 cited references is plotted to determine a K-factor that multiplies velocity.