2004-6-17 · 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.

2018-11-21 · An analysis is presented of fully developed laminar flow in an eccentric annulus. An exact solution for the velocity distribution is presented.

Laminar incompressible flow in straight ducts of eccentric annular cross section is analyzed. ... W.T. Snyder, G.A. GoldsteinAn analysis of fully developed laminar flow in , ...

Numerical solutions for laminar, fully developed, forced convective heat transfer in ecccentric annuli are presented. With an insulated outer surface, two types of thermal boundary conditions have been considered: constant wall temperature (T), and uniform axial heat flux with constant peripheral temperature (H1) on the inner surface of the annulus; these are representative of many practical ...

2018-12-3 · Fully-developed turbulent flow in concentric and eccentric annuli is numerically simulated as part of an investigation aimed at modeling drilled cuttings transport in inclined wellbores.

2016-10-29 · American Journal of Numerical Analysis. 2. velocity profile of Newtonian fluid in laminar flow regime would differ dramatically from that of an eccentric

2013-6-27 · An analytical solution and a numerical analysis are presented to study the flow behavior in concentric annulus with moving core in pipe for laminar flow condition. The analytical analysis is presented as exact solution for steady, fully developed and one dimensional flow. The numerical model is presented to study two-dimensional,

1996-2-8 · Laminar combined convection of non-Newtonian fluids in vertical eccentric annuli, in which the inner and outer walls are held at different constant temperatures is considered and a new economical method of solution for the three-dimensional flow in the annulus is developed.

2018-11-15 · The mathematical model involves the usual assumptions that the arterial segment is straight, the arterial wall is rigid and impermeable, blood is an incompressible Newtonian fluid, and the flow is fully developed. The flow rate (flux) is considered as a periodic function of time (prescribed).

The solution is in excellent agreement with the two published limiting cases of slip flow through concentric annuli and no-slip flow through eccentric annuli. It is shown that for a fixed aspect ratio, fully eccentric channels sustain the maximum average velocity (flow rate) under the same pressure gradient and slip conditions.

2013-6-10 · • The fluid rheology in the annulus was described by H-B model. • Flow regime in the annulus satisfied fully developed laminar and flow rate kept constant. • 𝐾𝐾Fluid physical parameters could not change during the flow in the annulus. 𝑘𝑘

2017-8-25 · Application of Spectral Collocation Method to Conduction and Laminar Forced Heat>-95 1. Introduction A considerable interest in the problems offlow and heat transfer in annuli, both concentric and eccentric, has arisen in recent decades (Reynolds, et. al., 1963; Cheng and Hwang, 1968; Trom betta, 1(71). Eccentric ann uli are employed in a

Fully Developed Laminar Fluid Flow and Heat Transfer in an Eccentric Annulus With an Axially Moving Core T. Shigechi , S. Momoki and Y. Lee [ + - ] Author and Article Information

2017-8-26 · sented numerical results for the fully developed forced and mixed convection, respectively, in eccentric annuli. Recently, Chen et al. [15] have solved laminar flow problem for the case of eccentric annuli using analytical and semi-analytical Green's function approaches. solved by using analytical and semi-analytical approaches.

2010-2-8 · An analytical solution and a numerical analysis are presented to study the flow behavior in concentric annulus with moving core in pipe for laminar flow condition. The analytical analysis is presented as exact solution for steady, fully developed and one dimensional flow. The numerical model is presented to study two-dimensional,

The solution is in excellent agreement with the two published limiting cases of slip flow through concentric annuli and no-slip flow through eccentric annuli. It is shown that for a fixed aspect ratio, fully eccentric channels sustain the maximum average velocity (flow rate) under the same pressure gradient and slip conditions.

2018-11-15 · The mathematical model involves the usual assumptions that the arterial segment is straight, the arterial wall is rigid and impermeable, blood is an incompressible Newtonian fluid, and the flow is fully developed. The flow rate (flux) is considered as a periodic function of time (prescribed).

1995-6-3 · An eccentric instead of concentric annular duct is sometimes used as a fluid-flow and heat-transfer device especially in nuclear power plants. The hydrodynamically and thermally fully developed laminar flow with uniform heat flux through the inner and outer walls has been analyzed.

The solution of the energy equation for forced convection problems in eccentric annular ducts of fully developed laminar flow with heat sources and constant wall tempera- ture gradient, is difficult to obtain with the velocity distri- bution given in bipolar coordinates.

For the same heating conditions, the heat transfer rate in the concentric annular channel was found to be greater than that in the highly eccentric channel, while the mass flow rate was higher in the eccentric

Fully developed laminar axial flow of yield-power-law fluids in eccentric annuli has been investigated numerically. The annuli may be fully open or partially blocked. General nonorthogonal, boundary-fitted curvilinear coordinates have been used to accurately model the irregular annular geometry due to the presence of a flow blockage.

2002-9-3 · of steady, isothermal, fully developed laminar ﬂow of a generalised Newtonian (shear-thinning) ﬂuid through an annulus consisting of an outer cylindrical cylinder and an inner cylinder, which may be offset (i.e. eccentric) and rotating. In conventional drilling the radius ratio of the annulus geometry is typically about 0.5, whereas in slim-

2004-9-28 · Shigechi T, Momoki S, Lee Y (1994) Fully developed laminar flow and heat transfer in eccentric annuli with axially moving cores, heat transfer division. ASME HTD

2004-12-3 · Poiseuille law describes laminar flow of a Newtonian fluid in a round tube (case 1). We will derive Poiseuille law for a Newtonian fluid and leave the flow of a power-law fluid as an assignment. The equation of motion for the steady, ... Since the flow is steady and fully developed

The measurements with the non-Newtonian fluid were less detailed since refraction limited the flow accessible to the light beams. The average wall shear stress coefficient was similar to that for the Newtonian fluid in the laminar region of the concentric-annulus flow and higher for the two eccentric

Read "Effect of eccentricity and thermal boundary conditions on laminar fully developed flow in annular ducts, International Journal of Heat and Fluid Flow" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

1995-6-3 · An eccentric instead of concentric annular duct is sometimes used as a fluid-flow and heat-transfer device especially in nuclear power plants. The hydrodynamically and thermally fully developed laminar flow with uniform heat flux through the inner and outer walls has been analyzed.

The results are presented of extensive numerical calculations, carried out using a highly accurate finite-volume method, for the fully developed laminar flow of an inelastic shear-thinning power-law fluid through an eccentric annulus with inner cylinder rotation.

2015-9-30 · ENSC-283 Assignment #7 Assignment date: Monday Mar. 9, 2009 Due date: Monday Mar. 16, 2009 Problem1: (Fully developed laminar flow down an inclined plane surface) A liquid flows down an inclined plane surface in a steady, fully developed laminar film of thickness h. Simplify the continuity and Navier-Stokes equations to model this flow field.

2017-1-18 · an analysis of fully developed laminar flow in an eccentric annulus 【】Towards an automatic analysis of security protocols in first-order logic Contrast-Based Fully ...

2017-6-27 · to investigate flow through annuli with a rotating inner boundary, a flow analysis for an eccentric annulus using slip boundary conditions, and an experimental investigation of flow through ultra fine filtering media The first report in this series (3) describes the results of The second report in this series (4) was an interim These

The results for Newtonian eccentric annular flow with 0.0001 eccentricity are in agreement with the Newtonian concentric annular flow. The Power-law eccentric annular flow results with flow index of 1.0 are verified with Newtonian fluid eccentric annular flow results.

2014-6-30 · The Analysis The geometry considered in the present analysis is shown in Figure I, The equation of motion for fully developed laminar flow may be written as where the pressure gradient is constant because of the assump- tion of fully developed flow, The viscosity z~i.11 be assumed constant.

1974-10-1 · The paper presents numerical solutions to the problem of laminar heat transfer in eccentric annuli with the inner cylinder rotating. The method of solution is based on the general finite-difference procedure for solving elliptic partial differential equations developed by Gosman et al. (1)‡.

2011-2-25 · The laminar and turbulent helical flows of non-Newtonian fluids in concentric and fully eccentric annuli with a rotating inner pipe are numerically simulated using computational fluid dynamics. Pipe rotation speeds are varied from 0 to 400 rpm at different annular flow velocities (0.005–10.05 ft/s ...

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.

2018-11-30 · The computational investigation of flow in an eccentric annulus, with Newtonian and non-Newtonian fluids, presents a contribution to the understanding of the flow field occurring during fully-developed laminar flow conditions.

2017-8-28 · cro annulus flow for fully developed laminar flow with uni-form heat flux at the walls. Second law characteristics of heat transfer and fluid flow due to forced convection of steady-laminar flow of incompressible fluid inside channel with cir-cular cross-section and channel made of two parallel plates were analyzed by Mahmud and Fraser [20].

The energy equations with the boundary conditions of temperature jump are solved for the hydrodynamical and thermal fully developed laminar flow of the ...

2017-11-15 · – The governing equations, i.e. continuity, momentum and energy equations, are integrated numerically within Comsol Multiphysics ® environment, under the assumption of incompressible Newtonian and constant properties fluid and of periodically fully developed laminar flow for what concerns both the hydrodynamic and the thermal problem under the uniform ...

2017-8-28 · cro annulus flow for fully developed laminar flow with uni-form heat flux at the walls. Second law characteristics of heat transfer and fluid flow due to forced convection of steady-laminar flow of incompressible fluid inside channel with cir-cular cross-section and channel made of two parallel plates were analyzed by Mahmud and Fraser [20].

2009-7-7 · convection in the region where laminar flow is fully developed both thermally and hydrodynamically was studied by Skelland (1967) and Barletta (1997), whereas the simultaneous development of the laminar flow and the convective heat transfer in short circular ducts have been experimentally analyzed by Fontes and Gasparetto (2001).

Fully developed laminar axial flow of yield-power-law fluids in eccentric annuli has been investigated numerically. The annuli may be fully open or partially blocked. General nonorthogonal, boundary-fitted curvilinear coordinates have been used to accurately model the irregular annular geometry due to the presence of a flow blockage.

It was observed that, an increase in the fluid temperature in fully eccentric annulus results in a decrease in the pressure gradient. On the other hand, the influence of temperature on pressure gradient becomes more significant, as the Reynolds number is raised.

2013-10-30 · al [2] have studied the fully developed laminar flow of purely viscous non-Newtonian liquids through annuli, including the effects of eccentricity and inner-cylinder rotation. Lorenzini and Casalena [4] have analyzed pulsatile blood flow in an atherosclerotic human artery with eccentric plaques.

2017-6-27 · In addition an analysis of rarefied flow through an eccentric annulus using slip boundary conditions has been obtained and compared with previously obtained experimental data with excellent results. gas flow through ultra-fine filters has been conducted. developed which can be used to predict the flow rate per unit pressure drop

1974-10-1 · The paper presents numerical solutions to the problem of laminar heat transfer in eccentric annuli with the inner cylinder rotating. The method of solution is based on the general finite-difference procedure for solving elliptic partial differential equations developed by Gosman et al. (1)‡.

Cuttings transport modeling in inclined and horizontal wellbores is complicated due to the eccentricity of the annulus. Development of a model for cuttings transport requires a deep understanding of the drilling mud flow behavior in the eccentric annular geometry. In this paper, bipolar coordinates system is used to solve for the eccentric annular geometry due to irregular shape of the boundaries.

2014-6-25 · An attempt has been made to apply the direct numerical simulation (DNS) to a fully-developed single-phase turbulent flow analysis for an eccentric annulus channel configuration. The objective of this investigation is focused on the heterogeneity and

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