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Thursday, July 23, 2020 | History

2 edition of Numerical simulation of non-Newtonian fluid flow in mixing geometries. found in the catalog.

Numerical simulation of non-Newtonian fluid flow in mixing geometries.

Stephen Paul Havard

Numerical simulation of non-Newtonian fluid flow in mixing geometries.

by Stephen Paul Havard

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Published .
Written in English


Edition Notes

Thesis (Ph.D.) - Polytechnic of Wales, Pontypridd, 1989.

ContributionsPolytechnic of Wales.
ID Numbers
Open LibraryOL16799688M

simulation to investigate the flow behavior of Herschel-Bulkley non-Newtonian fluid flow through propped fractures. I developed the comprehensive mathematical model, and then modified the model based on numerical simulation results. In the simulations, I developed a micro pore-scale model to mimic the real porous structure of flow channel.   Effect of centerline distance on mixing of a Non-Newtonian fluid in a cavity with asymmetric rotors the mesh superposition technique was used to include the internal moving parts in the fixed meshes of the flow domain. A non-Newtonian fluid obeying the Carreau–Yasuda constitutive model was used. “ Numerical simulation of.

@article{osti_, title = {Encyclopedia of fluid mechanics, vol. 7}, author = {Cheremisinoff, N P}, abstractNote = {Covers rheology and flow dynamics of non-Newtonian fluids, providing treatment of practical rheology and industrial handling and processing of rheologically complex fluids. Addressees compressible flow dynamics and aerodynamic principles important to discrete flow . The Volume of Fluid (VOF) method in ANSYS-Fluent is used, in which a two-phase flow with two immiscible fluids (air and PVC) and their interface are simulated. The boundary phase of both Newtonian and non-Newtonian fluids (Herschel-Bulkley-law and Thixotropic model) are simulated and compared.

  [] Wachs, A., Numerical simulation of steady bingham flow through an eccentric annular cross-section by distributed Lagrange multiplier/fictitious domain and augmented La-grangian methods, Journal of Non-Newtonian Fluid Mechanics, Vol. . General Introduction; Introduction; Rheometrical properties of non-Newtonian fluids; Non-Newtonian flow in complex geometries; The role of non-Newtonian fluid mechanics; Chapter 2. Basic Equations; Introduction; Field equations; Navier Stokes equations; Rheological equations of state.


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Numerical simulation of non-Newtonian fluid flow in mixing geometries by Stephen Paul Havard Download PDF EPUB FB2

The novel rotors co‐rotate and have different geometries with a speed ratio of 2. Numer A Numerical Simulation of Enhanced Mixing of a Non‐Newtonian Fluid in a Cavity with Asymmetric Non‐Twin Rotors - Xu - - Macromolecular Theory and Simulations - Author: Baiping Xu, Yao Liu, Huiwen Yu, Lih‐Sheng Turng, Chuntai Liu.

The numerical simulation of many industrial problems has been carried out using viscoelastic models of the Oldroyd kind. The aim of this work is to develop a mixed finite element method for the computation of instationary, incompressible non-Newtonian fluid flow.

The Bingham model indicates that flow occurs when the driving force on non‐Newtonian fluids is greater than the yield stress. 12 The power‐law model describes the flow characteristics of non‐Newtonian fluids at low shear rates.

13 The rheological curve of the Carson model is a straight line, and the rheological properties of non Cited by: 1. A: Mixing quality at the outlet of the one-ring geometry for non-Newtonian fluid (blood) using optimized variables (u = mm/s, v = V, f = 4 Hz, pi phase lag for electrodes).

Mixing quality of 98% was achieved at the end of by: The study of behavior of affected flow regions of blood cells in arteries has significant impact in understanding atherogenesis. The non-Newtonian model is applied to fluid dynamics approach consisting of plasma, RBCs, and leukocytes was studied to arrive at numerical simulations of local hemodynamics in a flow regime.

NUMERICAL SIMULATION OF LAMINAR FLOW OF NON-NEWTONIAN FLUIDS IN A RHYTHMICAL NON-PERMEABLE MEDIUM Department of Mechanical Engineering, Faculty of Engineering and Technology, University of Ilorin, Ilorin, NIGERIA Abstract: This paper presents the flow of chyme, orange juice, and water melon juice through a modelled oesophagus.

Numerical Simulation of Non-Newtonian Flow focuses on the numerical simulation of non-Newtonian flow using finite difference and finite element techniques. Topics range from the basic equations governing non-Newtonian fluid mechanics to flow classification and finite element calculation of flow (generalized Newtonian flow and viscoelastic flow).

Several kinds of researches have been conducted on peristaltic flow of non-Newtonian fluid in modelled oesophagus, stomach and intestine. However, fur. Advances in pore-scale imaging (e.g., μ-CT scanning), increasing availability of computational resources, and recent developments in numerical algorithms have started rendering direct pore-scale numerical simulations of multi-phase flow on pore structures feasible.

Quasi-static methods, where the viscous and the capillary limit are iterated sequentially, fall short in. Numerical Simulation and Experimental Study of Non-Newtonian Mixing Flow Brazilian Journal of Chemical Engineering Vol.

23, No. 04, pp. -October - December, Visualization of the Vortex To determine the flow pattern a tracer fluid. A three-dimensional finite volume simulation is used to study the performance of the mixer. The non-Newtonian fluid is modeled by the Carreau law model for the shear stress.

The effects of the Reynolds number of the flow and also properties of non-Newtonian fluids on the static mixer performance have been studied. Numerical Simulation of Non-Newtonian Flow focuses on the numerical simulation of non-Newtonian flow using finite difference and finite element techniques.

Topics range from the basic equations governing non-Newtonian fluid mechanics to flow classification and finite element calculation of flow (generalized Newtonian flow and viscoelastic flow).Reviews: 1. To better understand the relationship between flow, mixing and reactions in the process of preparing PP/TiO2, a 3D numerical simulation in a co-rotating twin screw extruder (TSE) was firstly employed using commercial CFD code, ANSYS Polyflow.

The effects of rotating speed of screws, stagger angle of knead blocks, inlet flow rate and initial temperature of barrel on the mixing.

Numerical Methods for Non-Newtonian Fluids: Special Volume (ISSN Book 16) - Kindle edition by Glowinski, R., Xu, Jinchao. Download it once and read it on your Kindle device, PC, phones or tablets.

Use features like bookmarks, note taking and highlighting while reading Numerical Methods for Non-Newtonian Fluids: Special Volume (ISSN Book 16).Manufacturer: North Holland. (1), it is not appropriate to define a non-Newtonian fluid simply as one that does not obey Newton’s postulate – for the simple reason that some elastic fluids (like the so-called Boger fluids (Boger /78)) do in fact possess a constant viscosity and would therefore satisfy Eq.

(1) in a steady simple shear flow. So, a non-Newtonian. The numerical simulation of the process follows a two-stage process: the first characterizes the lost circulation flow and the second the particle injection. The numerical model comprises an Eulerian&#x;Lagrangian approach, in which the dense discrete phase model (DDPM) is combined with the discrete element method (DEM).

A stationary flow of a non-Newtonian fluid in the plane and axisymmetric channels equipped with such fittings as T-junction, sudden contraction, and ball valve has been simulated numerically. Mathe. This study presents the numerical investigation of thermo-physical properties of non-Newtonian fluid in a modelled intestine.

The properties investigated were fluid temperature, velocity, Nutsselt number and wall shear stress. Numerical simulation was performed by solving 3D Navier-Stokes and continuity equations.

Abstract In this work, numerical simulation of an elongational flow of polymer solutions is tried. The flow field is computed in a cell of simple geometry for newtonian, non-newtonian inelastic and non-newtonian elastic fluids.

For the latter, an Oldroyd four-constant-model was adopted. Numerical simulation of non-Newtonian fluid flow in mixing geometries. of the work the implementation of the primitive variable finite element method to solve a simple two dimensional fluid flow problem is studied.

For the same geometry colour band mixing is also investigated. Further investigational work is undertaken into the flows. Blood flow of MHD non-Newtonian nanofluid with heat transfer and slip effects: Application of bacterial growth in heart valve Asmaa F.

Elelamy, Nasser S. Elgazery, R. Ellahi. This paper aims to investigate a mathematical model with numerical simulation for .Gilles Bouchet's 31 research works with citations and 1, reads, including: Transitional Dynamics of Freely Falling Discs.title = "Direct numerical simulation of turbulent non-Newtonian flow using OpenFOAM", abstract = "Understanding transition and turbulence in the flow of shear-thinning non-Newtonian fluids remains substantially unresolved and additional research is required to develop better computational methods for wall-bounded turbulent flows of these fluids.