Some universality in subcritical behavior of real substances and model fluids

Despite progress in laser-based and computational tools, an accessible model that relies on fundamentals and offers a reasonably accurate estimation of droplet size and velocity is lacking, primarily due to entangled complex breakup mechanisms. Therefore, this study aims at using the integral form of the conservation equations to create a system of equations by solving which, the far-field secondary atomization can be analyzed through predicting droplet size and velocity distributions of the involved phases. To validate the model predictions, experiments are conducted at ambient conditions using water, methanol, and acetone as model fluids with varying formulation properties, such as density, viscosity, and surface tension. Droplet size distribution and velocity are measured with laser diffraction and a high-speed camera, respectively. Finally, an attempt is made to utilize non-scaled parameters to characterize the atomization process, useful for extrapolating the sensitivity analysis to other scales. The merit of this model lies in its simplicity for use in process control and optimization.

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AN APPROACH OF OPTIMAL CONTROL TYPE TO MODEL FLUIDS WITH HEAT FLOW

Computational Intelligence in Decision and Control ◽

10.1142/9789812799470_0190 ◽

2008 ◽

Author(s):

STANISLAW SIENIUTYCZ

Keyword(s):

Optimal Control ◽

Heat Flow ◽

Model Fluids

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Magnetoviscous model fluids

Journal of Physics Condensed Matter ◽

10.1088/0953-8984/15/15/307 ◽

2003 ◽

Vol 15 (15) ◽

pp. S1403-S1423 ◽

Cited By ~ 30

Author(s):

Martin Kr ger ◽

Patrick Ilg ◽

Siegfried Hess

Keyword(s):

Model Fluids

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Numerical Simulation of Poly-Dispersed Bubbly Flows in Bubble Columns Using a Multi-Fluid Model(Fluids Engineering)

TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B ◽

10.1299/kikaib.75.759_2182 ◽

2009 ◽

Vol 75 (759) ◽

pp. 2182-2189 ◽

Cited By ~ 2

Author(s):

Masahiro TANAKA ◽

Kosuke HAYASHI ◽

Akio TOMIYAMA

Keyword(s):

Numerical Simulation ◽

Fluid Model ◽

Bubble Columns ◽

Bubbly Flows ◽

Model Fluids

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Laminar-Turbulent Transition in Pipeflow of Casson Model Fluids

Journal of Energy Resources Technology ◽

10.1115/1.3230860 ◽

1981 ◽

Vol 103 (4) ◽

pp. 318-321 ◽

Cited By ~ 2

Author(s):

R. W. Hanks

Keyword(s):

General Theory ◽

Turbulent Flow ◽

Design Method ◽

Bingham Model ◽

Theoretical Methods ◽

Casson Model ◽

Turbulent Transition ◽

Critical Velocities ◽

Model Fluids ◽

Laminar Turbulent Transition

Methanol-coal slurries are known to behave as homogeneous non-Newtonian suspensions. Darby has shown that the Casson and Bingham models reasonably describe the rheology of methanol-lignite slurries. Theoretical methods are available for predicting critical velocities for Bingham model slurries, but none exist for Casson model slurries. Theoretical equations and design curves are derived and presented for Casson model slurries. These are based upon a proven general theory for transition critical velocities. These results are the essential first phase of a coordinated theory-based design method for transitional and turbulent flow of methanol-coal slurries and any other slurries having Casson-model rheology.

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Ginzburg criterion for the crossover behavior of model fluids

The Journal of Chemical Physics ◽

10.1063/1.477515 ◽

1998 ◽

Vol 109 (19) ◽

pp. 8504-8513 ◽

Cited By ~ 35

Author(s):

Wolffram Schröer ◽

Volker C. Weiss

Keyword(s):

Crossover Behavior ◽

Model Fluids

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Adsorption and Tribochemical Reactions

MRS Proceedings ◽

10.1557/proc-159-257 ◽

1989 ◽

Vol 159 ◽

Author(s):

W. M. Mullins ◽

T. E. Fischer

Keyword(s):

Free Energy ◽

Band Gap ◽

Reaction Rate ◽

Water Adsorption ◽

Surface Reaction ◽

Wear Test ◽

Aqueous Solubility ◽

Test Results ◽

Effect Of Water ◽

Model Fluids

ABSTRACTA model for chemisorption based on the Lewis theory is proposed and developed. The model reproduces the observed relationship between aqueous solubility and band gap for covalent oxides. A relationship is shown between the calculated free-energy of the surface reactions and the observed effect of water on the wear of these materials. This relationship is explained in terms of surface reaction rate and equilibrium. Similar calculations for the adsorption of -CH3 functional groups are presented. The results are compared to water adsorption calculations and related to experimental wear test results for model fluids on covalent oxides. The effect of water on lubricant adsorption is discussed.

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