scholarly journals Free surface lubrication of rotating cylinders by impacting Newtonian liquid jet

2021 ◽  
Author(s):  
Benjamin Bizjan ◽  
Brane Širok ◽  
Marko Blagojevič
Keyword(s):  
Free Surface ◽  
Newtonian Liquid ◽  
Liquid Jet ◽  
Rotating Cylinders

scholarly journals Acoustic prediction of flowrate: varying liquid jet stream onto a free surface

2020 ◽  
Author(s):  
B T Balamurali ◽  
Edwin Jonathan Aslim ◽  
Yun Shu Lynn Ng ◽  
Tricia Li Chuen Kuo ◽  
Jacob Shihang Chen ◽  
...  
Keyword(s):  
Free Surface ◽  
Liquid Jet ◽  
Jet Stream

Prediction of free surface waves induced by shear layer instability on liquid jet

2004 ◽  
Vol 2004 (0) ◽  
pp. 209
Author(s):  
Masataka INOUE ◽  
Kazuhiro ITOH ◽  
Hiroshige KUMAMARU ◽  
Yutaka KUKITA
Keyword(s):  
Free Surface ◽  
Surface Waves ◽  
Shear Layer ◽  
Liquid Jet ◽  
Shear Layer Instability ◽  
Free Surface Waves

Curved Non-Newtonian Liquid Jets With Surfactants

2009 ◽  
Vol 131 (9) ◽  
Author(s):  
Jamal Uddin ◽  
Stephen P. Decent
Keyword(s):  
Free Surface ◽  
Shear Thickening ◽  
Linear Instability ◽  
Liquid Jets ◽  
Liquid Jet ◽  
Long Wavelength ◽  
Droplet Sizes ◽  
Wavelength Approximation ◽  
Steady Solutions ◽  
Linear Instability Analysis

Applications of the breakup of a liquid jet into droplets are common in a variety of different industrial and engineering processes. One such process is industrial prilling, where small spherical pellets and beads are generated from the rupture of a liquid thread. In such a process, curved liquid jets produced by rotating a perforated cylindrical drum are utilized to control drop sizes and breakup lengths. In general, smaller droplets are observed as the rotation rate is increased. The addition of surfactants along the free surface of the liquid jet as it emerges from the orifice provides a possibility of further manipulating breakup lengths and droplet sizes. In this paper, we build on the work of Uddin et al. (2006, “The Instability of Shear Thinning and Shear Thickening Liquid Jets: Linear Theory,” ASME J. Fluids Eng., 128, pp. 968–975) and investigate the instability of a rotating liquid jet (having a power law rheology) with a layer of surfactants along its free surface. Using a long wavelength approximation we reduce the governing equations into a set of one-dimensional equations. We use an asymptotic theory to find steady solutions and then carry out a linear instability analysis on these solutions.

scholarly journals Conjugated Heat Transfer on a Horizontal Surface Impinged by Circular Free-Surface Liquid Jet.

2002 ◽  
Vol 45 (2) ◽  
pp. 307-314 ◽  
Author(s):  
Yaohua ZHAO ◽  
Takashi MASUOKA ◽  
Takaharu TSURUTA ◽  
Chong-Fang MA
Keyword(s):  
Heat Transfer ◽  
Free Surface ◽  
Horizontal Surface ◽  
Liquid Jet ◽  
Conjugated Heat Transfer ◽  
Surface Liquid

Investigation of non-Newtonian liquid jet motion

2006 ◽  
Vol 13 (1) ◽  
pp. 37-42 ◽  
Author(s):  
A. V. Soldatkin ◽  
A. P. Andrievsky
Keyword(s):  
Newtonian Liquid ◽  
Liquid Jet

Particle migration in planar die-swell flows

2017 ◽  
Vol 825 ◽  
pp. 49-68 ◽  
Author(s):  
Ivan R. Siqueira ◽  
Márcio S. Carvalho
Keyword(s):  
Free Surface ◽  
Numerical Study ◽  
Hard Spheres ◽  
Nonlinear Differential Equations ◽  
Direct Consequence ◽  
Newtonian Liquid ◽  
Particle Migration ◽  
Stabilized Finite Element ◽  
Stabilized Finite Element Method ◽  
Dependent Viscosity

We present a numerical study on particle migration in a planar extrudate flow of suspensions of non-Brownian hard spheres. The suspension is described as a Newtonian liquid with a concentration-dependent viscosity, and shear-induced particle migration is modelled according to the diffusive flux model. The fully coupled set of nonlinear differential equations governing the flow is solved with a stabilized finite element method together with the elliptic mesh generation method to compute the position of the free surface. We show that shear-induced particle migration inside the channel leads to a highly non-uniform particle concentration distribution under the free surface. It is found that particle migration dramatically changes the shape of the free surface when the suspension is compared to a Newtonian liquid with the same bulk properties. Remarkably, we observed extrudate expansion in the Newtonian and dilute suspension flows; in turn, at high concentrations, a die contraction appears. The model does not account for normal stress differences, and this result is a direct consequence of variations in the flow stress field caused by shear-induced particle migration.

Non-linear waves along a rotating non-Newtonian liquid jet

2008 ◽  
Vol 46 (12) ◽  
pp. 1253-1265 ◽  
Author(s):  
J. Uddin ◽  
S.P. Decent ◽  
M.J.H. Simmons
Keyword(s):  
Newtonian Liquid ◽  
Liquid Jet ◽  
Linear Waves ◽  
Non Linear

A Numerical Study on Flow Characteristics of 2D Vertical Liquid Jet Striking a Horizontal Surface

2010 ◽  
Author(s):  
M. Kimiaghalam ◽  
M. Passandideh-Fard
Keyword(s):  
Reynolds Number ◽  
Hydraulic Jump ◽  
Numerical Study ◽  
Flow Characteristics ◽  
Newtonian Liquid ◽  
Liquid Jets ◽  
Liquid Jet ◽  
Moderate Reynolds Number ◽  
Different Types ◽  
Newtonian Liquids

We studied numerically impingement of vertical liquid jets of moderate Reynolds number for both Newtonian and non-Newtonian liquids to clarify the structure formation of circular hydraulic jump and the phenomenon of jet buckling. First, we have studied the hydraulic jump characteristics and governing parameters for a laminar water jet. Moreover, different types of hydraulic jump have been investigated by varying the height of a circular wall around the bed in flow downstream. The results show that a circular hydraulic jump has two kinds of steady states which can be reached by changing wall height. Next, we studied the impingement of a non-Newtonian liquid jet on a solid surface. In this case, we observe that instead of having a significant hydraulic jump, jet buckling phenomenon happens. The results were used in order to achieve a better understanding of the jet buckling phenomenon and the conditions in which this phenomenon happens.

Impingement Heat Transfer of Free-Surface Liquid Jets

2002 ◽  
Author(s):  
Albert Y. Tong
Keyword(s):  
Heat Transfer ◽  
Free Surface ◽  
Stokes Equations ◽  
Numerical Study ◽  
Navier Stokes ◽  
Liquid Jets ◽  
Liquid Jet ◽  
Stagnation Region ◽  
Navier Stokes Equations ◽  
Impingement Heat Transfer

The problem of convective heat transfer of a circular liquid jet impinging onto a substrate is studied numerically. The objective of the study is to understand the hydrodynamics and heat transfer of the impingement process. The Navier-Stokes equations are solved using a finite-volume formulation. The free surface of the jet is tracked by the volume-of-fluid method. The energy equation is modeled by using an enthalpy-based formulation. Detailed flow fields as well as free surface contours and pressure distributions on the substrate have been obtained. Local Nusselt number variations along the solid surface have also been calculated. The effects of several key parameters on the hydrodynamics and heat transfer of an impinging liquid jet have been examined. It has been found that the jet-inlet velocity profile and jet elevation have a significant effect on the hydrodynamics and heat transfer, particularly in the stagnation region, of an impinging jet. The numerical results have been compared with experimental data obtained from the literature. The close agreement supports the validity of the numerical study.

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