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Topic: Newtonian fluid

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Fluid Mechanics

Viscous

Incompressible flow

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	fluid@Everything2.com
		A characteristic property of fluids is flow; a continuous and irrecoverable change in position of one part of the substance relative to another part caused by a shear stress.
		A Newtonian fluid is a fluid with a constant viscosity, for a fixed static pressure and temperature.
		Fluid dram, or Fluid drachm, a measure of capacity equal to one eighth of a fluid ounce.
	www.everything2.com /index.pl?node=fluid (899 words)

	Fluide Design Inc. - Help for calculating the friction loss for any Newtonian fluid (Site not responding. Last check: )
		Newtonian fluids are a large class of fluids, whose essential property VISCOSITY, was first defined by Newton (see Appendix A for a list of Newtonian and non-Newtonian fluids).
		Viscosity is the relationship between the velocity of a given layer of fluid and the force required to maintain that velocity.
		Looking at a longitudinal section of the pipe, the velocity of individual fluid particles is zero close to the wall and increases to a maximum value at the center of the pipe with every particle moving parallel to its neighbor.
	www.fluidedesign.com /help14.html (1068 words)

	Newtonian fluid: Encyclopedia of chemistry, analytics & pharmaceutics with 64,557 entries.
		A Newtonian fluid (named for Isaac Newton) is a fluid that flows like water—its stress versus rate of strain curve is linear and passes through the origin.
		For a Newtonian fluid, the viscosity, by definition, depends only on temperature and pressure (and also the chemical composition of the fluid if the fluid is not a pure substance), not on the forces acting upon it.
		If a fluid does not obey this relation, it is termed a non-Newtonian fluid, of which there are several types.
	www.chemie.de /lexikon/e/Newtonian_fluid (271 words)

	Newtonian fluid - Wikipedia, the free encyclopedia
		The constant of proportionality is known as the viscosity.
		μ is the fluid viscosity - a constant of proportionality
		In common terms, this means the fluid continues to flow, regardless of the forces acting on it.
	en.wikipedia.org /wiki/Newtonian_fluid (239 words)

	Fluid Dynamics (Site not responding. Last check: )
		Fluid mechanics is often considered a subdiscipline of continuum mechanics, as illustrated in the following table.
		The central equations for fluid dynamics are the Navier-Stokes equations, which are non-linear differential equations that describe the flow of a fluid whose stress depends linearly on velocity and on pressure.
		Fluid dynamicists often transform problems to frames of reference in which the flow is steady in order to simplify the problem.
	www.it-careernet.com /itc/general_finite_element_fluid_dynamics.htm (1288 words)

	5 Statics and dynamic forces in a Newtonian fluid
		In a fluid, regions of higher density feel a greater downward force, leading to flows which may be driven by buoyancy (density variations).
		Fluids tend to flow from high to low pressure: this is a result of the pressure gradient force, which is a `local' force and is expressed as,
		For Newtonian fluids, viscosity behaves as a `diffusion of velocity':
	www.env.leeds.ac.uk /envi2210/notes/node5.html (607 words)

	Non-Newtonian Fluid Flow Through Fabrics
		One approach is to describe the flow of air or fluid through a filtration media based on the properties of the air or fluid penetrant.
		This assumption is representative of the pore assembly present in a nonwoven fabric with random fiber orientations throughout the fabric structure, but has also been shown to have the capability of being extended to woven and knitted textile structures.
		The flow of the heterogeneous fluid through porous media will be modeled starting with tradition flow through porous media models (e.g., Kozeny-Carman) and modifying them to account for the non-Newtonian fluid and the nonlinear "clogging" of the fabric due to blood cell presence.
	www.p2pays.org /ref/04/03836.htm (1053 words)

	Re: What kind of non-newtonian fluid is inelastic(i need some example)?
		A Newtonian fluid is a fluid in which the stress is proportional to the strain rate.
		In a fluid, the atoms (molecules) are close to one another, as in a solid, but they are free to move past one another.
		An analogy with solid deformation would be: In a fluid undergoing shear the atoms (molecules) move past one another into the force fields of other atoms (molecules) such that a balanced intermolecular shear stress inside the fluid is achieved.
	www.madsci.org /posts/archives/jun99/930105014.Ph.r.html (484 words)

	ENGnetBASE: Engineering Handbooks Online
		The purpose of this book is to explore the systematic application of basic engineering principles to fluid flows that may occur in fluid processing and related activities.
		In Viscous Fluid Flow, the authors develop and rationalize the mathematics behind the study of fluid mechanics and examine the flows of Newtonian fluids.
		Fluid mechanics is a fundamental and essential element of advanced research, even for those working in different areas, because the principles, the equations, the analytical, computational and experimental means, and the purpose are common.
	www.engnetbase.com /ejournals/books/book_summary/summary.asp?id=572 (141 words)

	Glossary of Fluid Mechanics Terms
		A barotropic fluid is one whose pressure and density are related by an equation of state that does not contain the temperature as a dependent variable.
		A Newtonian fluid is a viscous fluid whose shear stresses are a linear function of the fluid strain rate.
		A Stokesian (or non-Newtonian) fluid is a viscous fluid whose shear stresses are a non-linear function of the fluid strain rate.
	www.efunda.com /formulae/fluids/glossary.cfm (520 words)

	Rheology measurements
		Viscosity is the measure of the internal friction of a fluid.
		So, at a given temperature the viscosity of a Newtonian fluid remains constant regardless of which viscometer model, spindle or speed is used to measure it.
		For pseudoplastic fluids the ratio exceeds 1.0 as the degree of pseudoplastic behavior increases.
	www.sju.edu /~phabdas/physics/rheo.html (2278 words)

	Scientific Glossary (Site not responding. Last check: )
		A fluid or dispersion whose rheological behavior is described by Newton's law of viscosity.
		A non-Newtonian fluid whose viscosity decreases as the applied shear rate increases, a process that is also termed shear thinning.
		For some fluids, the shear rate (flow) remains at zero until a threshold shear stress is reached, termed the yield stress.
	www.ucalgary.ca /~schramm/visc.htm (223 words)

	Explosion modelling (Site not responding. Last check: )
		To demonstrate the efficiency improvement, a physical-based fluid animation is presented as an example of using the proposed method.
		It is observed that fluid deformations may cause poor particle distribution which in turn causes inaccurate fluid modeling.
		The third contribution is a new SPH-based heat transfer method for animating non-Newtonian fluids, whereas heating effects have been animated in previous graphical models for elastic and plasto-elastic materials as well as Newtonian fluids.
	www.cs.ualberta.ca /~yang/Projects/Animation/animation.htm (678 words)

	N Glossary
		a fluid in which the viscosity remains constant for all rates of shear if constant conditions of temperature and pressure are maintained.
		Most drilling fluids behave as non-Newtonian fluids, as their viscosity is not constant but varies with the rate of shear.
		a passageway through jet bits that causes the drilling fluid to be ejected from the bit at high velocity.
	www.mms.gov /glossary/n.htm (716 words)

	Review questions: Fall 1999
		The geometry and flow conditions are the same as the example we did in class except that the fluid is not Newtonian but rather is a power-law, non-Newtonian fluid.
		You have a Newtonian fluid and a non-Newtonian fluid that have the same viscosities at low shear rates.
		Calculate the velocity profile for steady pressure-driven flow of an incompressible Newtonian fluid in a slit that is tilted 45 degrees upward.
	www.chem.mtu.edu /~fmorriso/cm310/midterm_review/midterm_review_2006.html (775 words)

	[No title]
		A common non-Newtonian fluid model is the power law model, which can be described as: EMBED Equation.2 where (is the shear stress, EMBED Equation.3 is the shear rate, K is the consistency coefficient, and n is the flow behavior index.
		Theory The Bernoulli equation for 2 points fluid flow system, in absence of a pump is given as: EMBED Equation.2 (1) where P1 is static pressure, v1 and v2 are average velocities, h1 and h2 are heights and Ef is friction loss of energy.
		The fluid is simply collected for a given amount of time as it exits the flow system and is then weighed.
	foodsci.rutgers.edu /fs401/Lab2_03.doc (1734 words)

	Cole-Parmer Technical Library
		With this type of measurement device, a specific volume of fluid passes through the orifice and the time it takes for the volume of fluid to pass through the orifice is proportional to the fluid viscosity.
		A Newtonian fluid is one in which the viscosity does not depend on the shear rate—no matter what shear is applied, the viscosity stays the same.
		Newtonian, pseudoplastic and thixotropic fluids pose no problem with an oval gear design as long as maximum viscosity limits are acknowledged.
	www.coleparmer.com /techinfo/print.asp?htmlfile=HVFlow_WP.htm&ID=342 (2262 words)

	Non-Newtonian Fluid Mechanics Results (Site not responding. Last check: )
		Fluid flow is of interest in nature, in phsiology, and in a great variety of industrial applications ranging from the performance of aircraft to the...
		In fluid mechanics the simple Newtonian fluid has come to be regarded as normal and fluids which show deviations from this type of flow behaviour...
		For the past 300 years or so, all of us have been accustomed to accept the simple Newtonian fluid model as the standard...
	stokes.ucsd.edu /fd_books/discipline/nnewtonfm.html (166 words)

	Dynamic, Absolute and Kinematic Viscosity
		The viscosity is the fluid resistance to shear or flow and is a measure of the adhesive/cohesive or frictional fluid property.
		Fluids for which the shearing stress is linearly related to the rate of shearing strain are designated as Newtonian Fluids.
		Newtonian materials are referred to as true liquids since their viscosity or consistency is not affected by shear such as agitation or pumping at a constant temperature.
	www.engineeringtoolbox.com /dynamic-absolute-kinematic-viscosity-d_412.html (1515 words)

	Glossary of Terms for the Institute for Non
		In a fluid, when external stress is exerted, deformation occurs and continues indefinitely until the stress is removed.
		The Newtonian fluid is the simplest example, where the rate of deformation is directly proportional to the stress applied to the fluid.
		Such fluids fall halfway between being a solid (where the stress depends on the instantaneous deformation) and Newtonian fluids (where the stress depends on the instantaneous rate of change in time of the deformation).
	innfm.swan.ac.uk /innfm_updated/content/about/glossary.asp?index=4 (437 words)

	Solid-Liquid Flows - Video Animations
		In Newtonian fluids, particles draft, kiss, and tumble.
		Saltation of 180 particles in a Newtonian fluid: Re=180, particle density=1.01g/cc.
		Direct simulation of resuspension of two layers of circular parcels in a Newtonian fluid.
	www.aem.umn.edu /Solid-Liquid_Flows/video.html (631 words)

	Non-Newtonian Fluid Dynamics & Applications
		Aside from air and water, most of the fluids we encounter in physical and industrial processes are "non-Newtonian" (meaning that there is no simple relationship between the stress and the rate of strain).
		Often, the 'rheology' arises because the fluid in question builds up a microstructure at the molecular level which becomes sufficiently extensive to affect the macroscopic properties of the fluid.
		In lava, for example, the microstructure is provided by a network of interlocked silicate crystals, and endows the fluid with an internal strength that allows lava to withstand a certain amount of imposed stress before it flows.
	www.math.ubc.ca /~njb/Research/non-newtonian.htm (412 words)

	[No title]
		It is observed that long bodies such as cylinders and ellipsoids sedimenting in water, for instance, will eventually orient itself with its longer side perpendicular to the direction of the fall, whereas in a strongly viscoealstic liquid it will eventually orient itself with its longer side parallel to the direction of fall.
		Non-Newtonian fluids as they also otherwise referred to correspond to fluids which cannot be explained by the Navier-Stokes equations and which display both viscous and viscoelastic effects.
		For instance, we are interested in complex situations where the material property of the fluid, such as the viscosity could depend upon temperature, pressure, concentration and such other physical quantities and the consequences of such coupling in real life situations.
	www.unc.edu /~avaidya/research.html (600 words)

	TACC > Secrets of Shear Thinning
		Surprisingly, the behavior of shear-thinning fluids, while easy to describe qualitatively or observe empirically, is extraordinarily complex and difficult to capture in a computational fluid dynamics model.
		An important property is viscosity, a measure of the resistance of a fluid to deformation under shear stress (any force that tends to change the shape of the material): the thicker the fluid, the higher its viscosity.
		The behavior of such fluids (and of Newtonian fluids as well) may depend also on whether other stresses include heating or cooling and on how long a stress is applied.
	www.tacc.utexas.edu /general/news/features/shearthinning.php (2352 words)

	General Chemistry Online: FAQ: Liquids: What is a non-Newtonian fluid?
		Newton devised a simple model for fluid flow that could be used to relate how hard you have to pull the trigger to how fast the liquid will squirt out of the pistol.
		Fluids like water and gasoline behave according to Newton's model, and are called Newtonian fluids.
		For some fluids (like mud, or snow) you can push and get no flow at all- until you push hard enough, and the substance begins to flow like a normal liquid.
	antoine.frostburg.edu /chem/senese/101/liquids/faq/non-newtonian.shtml (280 words)

	Digg - A pool filled with non-newtonian fluid (cornstarch + water)
		To understand what a non-newtonian fluid is, you need to know what a newtonian fluid is. To know what a newtonian fluid is, you need to understand the concept of viscosity.
		Now, if the fluid between the plates is Newtonian, three things are true: First, as soon as we apply a force, the plate moves at least a little, no matter how small the force is. Second, doubling the force doubles the plate's speed.
		The cornstarch suspension is a shear thickening fluid.
	digg.com /general_sciences/A_pool_filled_with_non_newtonian_fluid_cornstarch_water (3014 words)

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