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Thursday, July 23, 2020 | History

2 edition of numerical study of axisymmetric droplet impact of a shear thinning fluid. found in the catalog.

numerical study of axisymmetric droplet impact of a shear thinning fluid.

Michael Lucente

numerical study of axisymmetric droplet impact of a shear thinning fluid.

by Michael Lucente

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Published .
Written in English


About the Edition

An axisymmetric model has been developed to simulate the droplet impact of a shear thinning fluid. The volume of fluid (VOF) method is used for interface tracking, and a constant contact angle is applied at the contact line. A generalized Newtonian constitutive equation is implemented, and the Cross model is used to model shear thinning. Validation results are presented for the flow of a power law fluid in a lid driven cavity, and Newtonian droplet impact.Results are presented for both Newtonian and shear thinning impacts at a variety of Reynolds numbers, Re, with the Weber number, We, and contact angle, theta, held constant (We = 27 and theta = 90°). To compare the maximum spread, zeta max, a modified Reynolds number, Rem, is defined for shear thinning impacts. Furthermore, a representative strain rate is identified that closely collapses the curves of zeta max vs. Re for Newtonian and shear thinning fluids. This suggests that Newtonian analytical modes can predict zeta max, for shear thinning fluids by using Rem.

The Physical Object
Pagination85 leaves.
Number of Pages85
ID Numbers
Open LibraryOL19551757M
ISBN 109780494212844

In a fluid at rest, the normal stress is called pressure. The supporting walls of a fluid eliminate shear stress, and thus a fluid at rest is at a state of zero shear stress. When the walls are removed or a liquid container is tilted, a shear develops and the liquid splashes or moves to attain a horizontal free surface. Numerical methodology To overcome the difficulties cited in Section , a two zone approach is proposed: a detailed study of the internal cavitating-nozzle flow phenomena incorporating detailed effects of nozzle geometry, horn operation parameters and fluid flow properties are carried out.

The following is a (mostly) up-to-date list of the publications that have arisen from our group. BibTeX entries and DOI links are provided for convenience. Fluid Mechanics and Fluid Power – Contemporary Research: Proceedings of the 5th International and 41st National Conference on FMFP | Arun K. Saha, Debopam Das, Rajesh Srivastava, P. K. Panigrahi, K. Muralidhar (eds.) | download | B–OK. Download books for free. Find books.

For example, in a study of erosion under simple shear flow using four different types of titanium dioxide agglomerates in silicone oil, Lee, Feke and Manas-Zloczower () found ke to be proportional to the product FaWa, where Wa is the work of adhesion of the fluid to the particles (nearly equal to the dispersive component of the fluid. Numerical study of the square-root conformation tensor formulation for confined and free-surface viscoelastic fluid flows Advanced Modeling and Simulation In Engineering Sciences, 3 (2), pp. , S.I.S. Pinto and J.B.L.M. Campos Numerical study of wall shear stress-based descriptors in the human left coronary artery.


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Numerical study of axisymmetric droplet impact of a shear thinning fluid by Michael Lucente Download PDF EPUB FB2

Numerical simulations of a droplet passing through an axisymmetric microfluidic contraction are presented, focusing on systems where one of the two liquids present is shear thinning. We investigate binary droplet collisions as a prototype sub-process inside sprays and focus on shear-thinning liquids.

To understand the influence of the non-Newtonian fluid rheology on the flow. Binary droplet collisions are a key mechanism in powder coatings production, as well as in spray combustion, ink-jet printing, and other spray processes. The collision behavior of the droplets using Newtonian and polymer liquids is studied numerically by the coupled level-set and volume of fluid (CLSVOF) method and adaptive mesh refinement (AMR).

The deformation process, the internal flow Author: Lijuan Qian, Hongchuan Cong, Chenlin Zhu. Harvie et al. [30,56,80] studied droplet deformation in a axisymmetric microfluidic constriction applying the volume-of-fluid method.

The authors analysed the effect of Reynolds number (Re) and surface tension strength— S = 1 / (We + Ca) —on droplet deformation while using low viscosity Newtonian droplets and a high viscosity Author: Ana T. Cerdeira, João B. Campos, João M. Miranda, José D.

Araújo. Numerical simulations were performed after an experiment was complete, and the measured, theoretical, and numerical results were compared to assess the accuracy of the numerical results.

As numerical simulation techniques have matured, computational, analytic, and experimental efforts have become equal partners in fluid mechanics research. With recent advancement in droplet microfluidics for both microdroplet encapsulation and fission, it is of paramount importance to understand the flow physics for both Newtonian and non-Newtonian fluids in microdroplet encapsulation and fission as the development of the field is approaching to its maturity.

The chapter aims to review and discuss the fluid flow behavior of the multiphase system Author: Kai Seng Koh, Voon Loong Wong, Yong Ren. This volume comprises the proceedings of the 42nd National and 5th International Conference on Fluid Mechanics and Fluid Power held at IIT Kanpur in December, The conference proceedings encapsulate the best deliberations held during the conference.

The diversity of participation in the. () Numerical study of the shear-thinning effect on the interaction between a normal shock wave and a cylindrical liquid column. Physics of Fluids() A robust MoF method applicable to severely deformed polygonal by: () Numerical study of the shear-thinning effect on the interaction between a normal shock wave and a cylindrical liquid column.

Physics of Fluids() Numerical simulation of a bulb turbine with an eddy-preserving limiter by: Annular Shear-Thinning Flow Over an Axisymmetric Sudden Expansion.

Khaled J. Hammad. IMECE ; Numerical Study of Flow Physics Behind the Aerodynamic Performance on an Airfoil With Leading Edge Tubercles. A Study in Droplet Dispersion, Heat, and Mass Transfer. IMECE   Fluids that exhibit a non-linear behaviour between the shear stress τ and the shear rate \(\dot {\gamma }\) are called non-Newtonian and fluids whose response does not depend explicitly on time but only on the present shear rate are denoted generalised Newtonian fluids.

In particular, when the shear stress increases more than linearly with the shear rate, the fluid is called dilatant or shear Author: Marco E. Rosti, Francesco Picano, Luca Brandt.

Part I. Fundamental Issues and Perspective in Fluid Mechanics. Effect of Inlet Shear on the Flow Structures Associated with Elevated Jet in Cross-Flow at Low Reynolds Number Sachidananda Behera, Arun K. Saha. Slip Flow of a Shear-Thinning Power-Law Fluid Past an Assemblage of Spherical Particles Rahul R.

Ramteke, Nanda Kishore. Introduction. Since the days of Worthington (), the problem of droplet impact has offered the fluid dynamics research community exciting opportunities and challenges over the course of its the first time in a systematic manner, in his book entitled A study of splashes (Worthington, ), Worthington makes use of early photographic technology (alongside careful sketchwork Cited by: 6.

Zhang and G. Yu, Study of one-dimensional flow analysis model of the combustor in supersonic combustion experiments. Experiments and Measurements in Fluid Mechanics 17(1): p. Yue, S. Xu, and P. Zhang, Numerical study on a moving shock diffracted over the cylinder/square column in hydrogen air mixture.

72 S. Canberk Ozan: A simple 1D Shear-thinning Model:A Challenge for Reliability of Numerical Solution or Fake Instabilities 78 73 Jason R.

Picardo: Instability and Breakup of Interacting Fluid Interfaces 79 74 Dipin S. Pillai: Stability of three-layered core-annular ow A. Chatterjee and K. Muralidhar, Numerical Study of Enhanced Oil Recovery Using Surfactants, International J of Numerical Methods in Heat and Fluid Flow, Vol.

5, pp -(). Muralidhar and J. Swarup, Analytical Solution of an Adsorption - Desorption Problem, ASME J Applied Mechanics, Vol. 61, pp -(). Chen X, Mandre S, Feng JJ. An experimental study of the coalescence between a drop and an interface in Newtonian and polymeric liquids.

Phys Fluids ; Chen D, Cardinaels R, Moldenaers P. Effect of confinement on droplet coalescence in shear flow. Author: Johannes Kamp. Numerical Analysis of Spray Coating Processes. Figure 1: Schematic of Spray coating process Generally, spray application is the preferred choice for achieving smooth finishes in a coating process.

Review on the Dynamics of Isothermal Liquid Bridges José M. Montanero, Determination of Surface Tension and Contact Angle From the Shapes of Axisymmetric Fluid Interfaces Without Use of Apex Coordinates,” A Numerical Method to Study the Dynamics of Capillary Fluid Systems,”Cited by: 2.

The current thesis investigates the controlled spreading of droplets of complex fluids. This thesis makes four primary scientific contributions. Firstly, we provide detailed theoretical analysis on spreading of yield stress fluids.

We employ lubrication theory, asymptotic solutions, and numerical simulations to explain the dynamics and final static shape of a viscoplastic droplet on a solid Author: Maziyar Jalaal.

Experimental and numerical investigation of icing process of a liquid droplet. 9th AIAA Atmospheric and Space Environments Conference, Guo, Y., Lian, Y., & Sussman, M. (). Investigation of drop impact on dry and wet surfaces with consideration of surrounding air.Boundary Layer Transition - Progress and Challenges • Monday, 22 June • hrs.Steady planar and non-swirling axisymmetric flows: Flow classification and its use in numerical calculations of a quasi-Newtonian fluid The influence of viscoelastic fluid properties on spray formation from flat-fan and pressure-swirl atomizers.