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Sistem non-Newton

Non-Newtonian bodies adalah zat-zat yang tidak mengikuti persamaan

aliran Newton; dispersi heterogen cairan dan padatan seperti larutan

koloid, emulsi, suspensi cair, salep dan produk-produk serupa. Jika bahan-bahan non-Newton dianalisis dalam suatu viscometer putar dan hasilnya

diplot, diperoleh berbagai kurva konsistensi yang menggambarkan adanya

tiga kelas aliran yakni; plastis, pseudoplastis, dan dilatan.

Aliran Plastis

kurva aliran plastis tidak melalui titik (0,0) tapi memotong sumbu shearing

stress (atau akan memotong, jika bagian lurus dari kurva tersebut

diekstrapolasikan ke sumbu) pada suatu titik tertentu yang dikenal dengan

harga yield. Bingham bodies tidak akan mengalir sampai shearing stressdicapai sebesar yield value tersebut. Pada harga stress di bawah hargayield value, zat bertindak seperti bahan elastic. Ahli rheologi

menggolongkan Bingham bodie sebagai suatu bahan yangmempunyai/memperlihatkan yield value, seperti halnya zat padat. Sedang

zat-zat yang mulai mengalir pada shearing stress terkecil didefinisikansebagai cairan. Yield value adalah suatu sifat yang penting dari disperse-

dispersi tertentu. Aliran plastis berhubungan dengan adanya partikel-partikel yang terflokulasi dalam suspense pekat. Akibatnya, terbentuk

struktur kontinu di seluruh sistem. Adanya yield value disebabkan olehadanya kontak antara partikel-partikel yang berdekatan (disebabbkan oleh

gaya van der waals), yang harus dipecah sebelum aliran dapat terjadi.

Akibatnya yield value merupakan indikasi dari kekuatan flokulasi. Makin

banyak suspense yang terflokulasi, makin tinggi yield valuenya.

Aliran Pseudoplastis

Aliran pseudoplastis diperlihatkan oleh polimer-polimer dalam larutan,

yang merupakan kebalikan dari sistem plastis, yang tersusun dari partikel-

partikel yang terflokulasi dalam suspensi. Sejumlah besar produk farmasi

termasuk gom dan sintesis, misalnya: disperse cairan dari tragacanth,

natrium alginate, metilselulosa dan natrium karboksimetil selulosa,

menunjukkan aliran pseudoplastis.

Viskositas zat pseudoplastis berkurang dengan meningkatnya rate of

shear. Viskositas nyata dapat diperoleh pada setiap haraga rate of shear

dari kemiringan tangen (garis singgung) pada kurva pada tittik tertentu.

Aliran Dilatan

Suspense-suspensi tertentu dengan persentase zat padat terdispers yang

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tinggi menunjukkan peningkatan dalam daya hambat untuk mengalir dengan

meningkatnya rate of shear. Aliran dilatan adalah kebalikan dari aliran

pseudoplastis. Bahan-bahan aliran dilatan dikenal dengan istilah shear-

thickening system.

Zat-zat yang mempunyai sifat-sifat aliran dilatan adalah suspense-suspensi yang berkonsentrasi tinggi (kira-kira 50% atau lebih) dari

partikel-partikel kecil yang mengalami deflokulasi .

Diposkan oleh Afra Chemistry Lover di 03.46

http://afrachemistrylover.blogspot.com/2010/02/viskositas.html

2011-02-15

http://web2.clarkson.edu/projects/subramanian/ch301/notes/nonnewto

nian.pdf

2011-02-21

Non-Newtonian fluid

From Wikipedia, the free encyclopedia

This article needsadditional citations for verification.

Please help improve this article by adding reliablereferences. Unsourced material may

be challenged and removed. (June 2010)

Continuum mechanics

[show]Laws

[show]Solid mechanics

[hide]Fluid mechanics

Fluids

Fluid statics Fluid

http://afrachemistrylover.blogspot.com/2010/02/viskositas.htmlhttp://afrachemistrylover.blogspot.com/2010/02/viskositas.htmlhttp://web2.clarkson.edu/projects/subramanian/ch301/notes/nonnewtonian.pdfhttp://web2.clarkson.edu/projects/subramanian/ch301/notes/nonnewtonian.pdfhttp://en.wikipedia.org/wiki/Wikipedia:Citing_sources#Inline_citationshttp://en.wikipedia.org/wiki/Wikipedia:Verifiabilityhttp://en.wikipedia.org/w/index.php?title=Non-Newtonian_fluid&action=edithttp://en.wikipedia.org/wiki/Wikipedia:Identifying_reliable_sourceshttp://en.wikipedia.org/wiki/Wikipedia:Identifying_reliable_sourceshttp://en.wikipedia.org/wiki/Wikipedia:Identifying_reliable_sourceshttp://en.wikipedia.org/wiki/Template:Citation_neededhttp://en.wikipedia.org/wiki/Wikipedia:Verifiability#Burden_of_evidencehttp://en.wikipedia.org/wiki/Continuum_mechanicshttp://en.wikipedia.org/wiki/Non-Newtonian_fluidhttp://en.wikipedia.org/wiki/Non-Newtonian_fluidhttp://en.wikipedia.org/wiki/Solid_mechanicshttp://en.wikipedia.org/wiki/Non-Newtonian_fluidhttp://en.wikipedia.org/wiki/Fluid_mechanicshttp://en.wikipedia.org/wiki/Fluidhttp://en.wikipedia.org/wiki/Fluid_staticshttp://en.wikipedia.org/wiki/Fluid_dynamicshttp://en.wikipedia.org/wiki/File:BernoullisLawDerivationDiagram.svghttp://en.wikipedia.org/wiki/File:Question_book-new.svghttp://www.blogger.com/post-edit.g?blogID=9218969368003970373&postID=4261931382672027476http://afrachemistrylover.blogspot.com/2010/02/viskositas.htmlhttp://afrachemistrylover.blogspot.com/2010/02/viskositas.htmlhttp://web2.clarkson.edu/projects/subramanian/ch301/notes/nonnewtonian.pdfhttp://web2.clarkson.edu/projects/subramanian/ch301/notes/nonnewtonian.pdfhttp://en.wikipedia.org/wiki/Wikipedia:Citing_sources#Inline_citationshttp://en.wikipedia.org/wiki/Wikipedia:Verifiabilityhttp://en.wikipedia.org/w/index.php?title=Non-Newtonian_fluid&action=edithttp://en.wikipedia.org/wiki/Wikipedia:Identifying_reliable_sourceshttp://en.wikipedia.org/wiki/Wikipedia:Identifying_reliable_sourceshttp://en.wikipedia.org/wiki/Template:Citation_neededhttp://en.wikipedia.org/wiki/Wikipedia:Verifiability#Burden_of_evidencehttp://en.wikipedia.org/wiki/Continuum_mechanicshttp://en.wikipedia.org/wiki/Non-Newtonian_fluidhttp://en.wikipedia.org/wiki/Non-Newtonian_fluidhttp://en.wikipedia.org/wiki/Solid_mechanicshttp://en.wikipedia.org/wiki/Non-Newtonian_fluidhttp://en.wikipedia.org/wiki/Fluid_mechanicshttp://en.wikipedia.org/wiki/Fluidhttp://en.wikipedia.org/wiki/Fluid_staticshttp://en.wikipedia.org/wiki/Fluid_dynamics

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dynamics

Surface tension

NavierStokes equations

Viscosity:Newtonian, Non-Newtonian

[show]Rheology

[show]Scientists

vde

A non-Newtonian fluid is a fluid whose flow properties differ in any way

from those of Newtonian fluids. Most commonly the viscosity of non-Newtonian fluids is not independent of shear rate or shear rate history.

However, there are some non-Newtonian fluids with shear-independent

viscosity, that nonetheless exhibit normal stress-differences or other

non-Newtonian behavior. Many salt solutions and molten polymers are non-

Newtonian fluids, as are many commonly found substances such

as ketchup,custard, toothpaste, starch suspensions, paint, blood,

and shampoo. In a Newtonian fluid, the relation between the shear

stress and the shear rate is linear, passing through the origin, the

constant of proportionality being the coefficient of viscosity. In a non-

Newtonian fluid, the relation between the shear stress and the shear

rate is different, and can even be time-dependent. Therefore a constant

coefficient of viscosity cannot be defined.

Although the concept of viscosity is commonly used to characterize a

material, it can be inadequate to describe the mechanical behavior of a

substance, particularly non-Newtonian fluids. They are best studied

through several other rheological properties which relate the relations

between the stress and strain rate tensors under many different flow

conditions, such as oscillatory shear, or extensional flow which are

measured using different devices or rheometers. The properties are

better studied using tensor-valued constitutive equations, which are

common in the field of continuum mechanics.

Contents

[hide]

http://en.wikipedia.org/wiki/Fluid_dynamicshttp://en.wikipedia.org/wiki/Surface_tensionhttp://en.wikipedia.org/wiki/Navier%E2%80%93Stokes_equationshttp://en.wikipedia.org/wiki/Viscosityhttp://en.wikipedia.org/wiki/Newtonian_fluidhttp://en.wikipedia.org/wiki/Non-Newtonian_fluidhttp://en.wikipedia.org/wiki/Rheologyhttp://en.wikipedia.org/wiki/Non-Newtonian_fluidhttp://en.wikipedia.org/wiki/Template:Continuum_mechanicshttp://en.wikipedia.org/wiki/Template_talk:Continuum_mechanicshttp://en.wikipedia.org/w/index.php?title=Template:Continuum_mechanics&action=edithttp://en.wikipedia.org/wiki/Fluidhttp://en.wikipedia.org/wiki/Newtonian_fluidhttp://en.wikipedia.org/wiki/Newtonian_fluidhttp://en.wikipedia.org/wiki/Viscosityhttp://en.wikipedia.org/wiki/Shear_ratehttp://en.wikipedia.org/wiki/Salthttp://en.wikipedia.org/wiki/Ketchuphttp://en.wikipedia.org/wiki/Ketchuphttp://en.wikipedia.org/wiki/Custardhttp://en.wikipedia.org/wiki/Toothpastehttp://en.wikipedia.org/wiki/Starchhttp://en.wikipedia.org/wiki/Painthttp://en.wikipedia.org/wiki/Bloodhttp://en.wikipedia.org/wiki/Shampoohttp://en.wikipedia.org/wiki/Shear_stresshttp://en.wikipedia.org/wiki/Shear_stresshttp://en.wikipedia.org/wiki/Shear_ratehttp://en.wikipedia.org/wiki/Origin_(mathematics)http://en.wikipedia.org/wiki/Viscosityhttp://en.wikipedia.org/wiki/Shear_stresshttp://en.wikipedia.org/wiki/Shear_ratehttp://en.wikipedia.org/wiki/Shear_ratehttp://en.wikipedia.org/wiki/Rheologyhttp://en.wikipedia.org/wiki/Stress_(physics)http://en.wikipedia.org/wiki/Strain_ratehttp://en.wikipedia.org/wiki/Oscillationhttp://en.wikipedia.org/wiki/Tensorhttp://en.wikipedia.org/wiki/Constitutive_equationshttp://en.wikipedia.org/wiki/Continuum_mechanicshttp://en.wikipedia.org/wiki/Non-Newtonian_fluidhttp://en.wikipedia.org/wiki/Fluid_dynamicshttp://en.wikipedia.org/wiki/Surface_tensionhttp://en.wikipedia.org/wiki/Navier%E2%80%93Stokes_equationshttp://en.wikipedia.org/wiki/Viscosityhttp://en.wikipedia.org/wiki/Newtonian_fluidhttp://en.wikipedia.org/wiki/Non-Newtonian_fluidhttp://en.wikipedia.org/wiki/Rheologyhttp://en.wikipedia.org/wiki/Non-Newtonian_fluidhttp://en.wikipedia.org/wiki/Template:Continuum_mechanicshttp://en.wikipedia.org/wiki/Template_talk:Continuum_mechanicshttp://en.wikipedia.org/w/index.php?title=Template:Continuum_mechanics&action=edithttp://en.wikipedia.org/wiki/Fluidhttp://en.wikipedia.org/wiki/Newtonian_fluidhttp://en.wikipedia.org/wiki/Viscosityhttp://en.wikipedia.org/wiki/Shear_ratehttp://en.wikipedia.org/wiki/Salthttp://en.wikipedia.org/wiki/Ketchuphttp://en.wikipedia.org/wiki/Custardhttp://en.wikipedia.org/wiki/Toothpastehttp://en.wikipedia.org/wiki/Starchhttp://en.wikipedia.org/wiki/Painthttp://en.wikipedia.org/wiki/Bloodhttp://en.wikipedia.org/wiki/Shampoohttp://en.wikipedia.org/wiki/Shear_stresshttp://en.wikipedia.org/wiki/Shear_stresshttp://en.wikipedia.org/wiki/Shear_ratehttp://en.wikipedia.org/wiki/Origin_(mathematics)http://en.wikipedia.org/wiki/Viscosityhttp://en.wikipedia.org/wiki/Shear_stresshttp://en.wikipedia.org/wiki/Shear_ratehttp://en.wikipedia.org/wiki/Shear_ratehttp://en.wikipedia.org/wiki/Rheologyhttp://en.wikipedia.org/wiki/Stress_(physics)http://en.wikipedia.org/wiki/Strain_ratehttp://en.wikipedia.org/wiki/Oscillationhttp://en.wikipedia.org/wiki/Tensorhttp://en.wikipedia.org/wiki/Constitutive_equationshttp://en.wikipedia.org/wiki/Continuum_mechanicshttp://en.wikipedia.org/wiki/Non-Newtonian_fluid

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1 Types of non-Newtonian

behavior

o 1.1 Summary

o 1.2 Shear thickening fluids

o 1.3 Shear thinning fluid

o 1.4 Bingham plastic

o 1.5 Rheopectic

2 Examples

o 2.1 Oobleck

o 2.2 Flubber

o 2.3 Chilled caramel topping

o 2.4 Silly Puttyo 2.5 Ketchup

3 See also

4 References

5 External links

[edit]Types of non-Newtonian behavior

[edit]Summary

Comparison of non-Newtonian, Newtonian, and viscoelastic properties

Viscoelas

ticKelvin material

"Parallel" linearcombination of elastic

and viscous effects

http://en.wikipedia.org/wiki/Non-Newtonian_fluid#Types_of_non-Newtonian_behaviorhttp://en.wikipedia.org/wiki/Non-Newtonian_fluid#Types_of_non-Newtonian_behaviorhttp://en.wikipedia.org/wiki/Non-Newtonian_fluid#Summaryhttp://en.wikipedia.org/wiki/Non-Newtonian_fluid#Shear_thickening_fluidshttp://en.wikipedia.org/wiki/Non-Newtonian_fluid#Shear_thinning_fluidhttp://en.wikipedia.org/wiki/Non-Newtonian_fluid#Bingham_plastichttp://en.wikipedia.org/wiki/Non-Newtonian_fluid#Rheopectichttp://en.wikipedia.org/wiki/Non-Newtonian_fluid#Exampleshttp://en.wikipedia.org/wiki/Non-Newtonian_fluid#Oobleckhttp://en.wikipedia.org/wiki/Non-Newtonian_fluid#Flubberhttp://en.wikipedia.org/wiki/Non-Newtonian_fluid#Chilled_caramel_toppinghttp://en.wikipedia.org/wiki/Non-Newtonian_fluid#Silly_Puttyhttp://en.wikipedia.org/wiki/Non-Newtonian_fluid#Ketchuphttp://en.wikipedia.org/wiki/Non-Newtonian_fluid#See_alsohttp://en.wikipedia.org/wiki/Non-Newtonian_fluid#Referenceshttp://en.wikipedia.org/wiki/Non-Newtonian_fluid#External_linkshttp://en.wikipedia.org/w/index.php?title=Non-Newtonian_fluid&action=edit&section=1http://en.wikipedia.org/w/index.php?title=Non-Newtonian_fluid&action=edit&section=2http://en.wikipedia.org/wiki/Viscoelastichttp://en.wikipedia.org/wiki/Viscoelastichttp://en.wikipedia.org/wiki/Kelvin_materialhttp://en.wikipedia.org/wiki/File:Non-Newtonian_fluid.svghttp://en.wikipedia.org/wiki/Non-Newtonian_fluid#Types_of_non-Newtonian_behaviorhttp://en.wikipedia.org/wiki/Non-Newtonian_fluid#Types_of_non-Newtonian_behaviorhttp://en.wikipedia.org/wiki/Non-Newtonian_fluid#Summaryhttp://en.wikipedia.org/wiki/Non-Newtonian_fluid#Shear_thickening_fluidshttp://en.wikipedia.org/wiki/Non-Newtonian_fluid#Shear_thinning_fluidhttp://en.wikipedia.org/wiki/Non-Newtonian_fluid#Bingham_plastichttp://en.wikipedia.org/wiki/Non-Newtonian_fluid#Rheopectichttp://en.wikipedia.org/wiki/Non-Newtonian_fluid#Exampleshttp://en.wikipedia.org/wiki/Non-Newtonian_fluid#Oobleckhttp://en.wikipedia.org/wiki/Non-Newtonian_fluid#Flubberhttp://en.wikipedia.org/wiki/Non-Newtonian_fluid#Chilled_caramel_toppinghttp://en.wikipedia.org/wiki/Non-Newtonian_fluid#Silly_Puttyhttp://en.wikipedia.org/wiki/Non-Newtonian_fluid#Ketchuphttp://en.wikipedia.org/wiki/Non-Newtonian_fluid#See_alsohttp://en.wikipedia.org/wiki/Non-Newtonian_fluid#Referenceshttp://en.wikipedia.org/wiki/Non-Newtonian_fluid#External_linkshttp://en.wikipedia.org/w/index.php?title=Non-Newtonian_fluid&action=edit&section=1http://en.wikipedia.org/w/index.php?title=Non-Newtonian_fluid&action=edit&section=2http://en.wikipedia.org/wiki/Viscoelastichttp://en.wikipedia.org/wiki/Viscoelastichttp://en.wikipedia.org/wiki/Kelvin_material

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Anelastic

Material returns to a

well-defined "rest

shape"

Time-

dependen

t

viscosity

Rheopectic

Apparent viscosity incr

eases with duration of

stress[1]

Some lubricants, whipped cream

Thixotropic

Apparent viscosity decr

eases with duration ofstress[2]

Some Clays,

Some Drilling Mud,many paints, synovial

fluid,cerebral spinal

fluid, Honey under

certain conditions

Time-

independent

viscosity

Shear

thickening(dilatant

)

Apparent viscosity increases with increased

stress[3]

Suspensions of cornstarch or sand in

water

Shear

thinning(pseudoplastic)

Apparent viscosity decr

eases with increasedstress[4][5]

Paper pulp in water,latex

paint, ice, blood,

syrup, molasses

Generalized Newtonianfluids

Viscosity is constant

Stress depends on

normal and shearstrain rates and also

the pressure applied on

it

Bloodplasma,Custard

[edit]Shear thickening fluids

Shear thickening fluids are also used in all wheel drive systems utilising

a viscous coupling unit for power transmission.

[edit]Shear thinning fluid

http://en.wikipedia.org/wiki/Viscoelasticity#Types_of_viscoelasticityhttp://en.wikipedia.org/wiki/Rheopectyhttp://en.wikipedia.org/wiki/Viscosityhttp://en.wikipedia.org/wiki/Non-Newtonian_fluid#cite_note-springer1-0http://en.wikipedia.org/wiki/Lubricanthttp://en.wikipedia.org/wiki/Whipped_creamhttp://en.wikipedia.org/wiki/Whipped_creamhttp://en.wikipedia.org/wiki/Thixotropyhttp://en.wikipedia.org/wiki/Viscosityhttp://en.wikipedia.org/wiki/Non-Newtonian_fluid#cite_note-springer2-1http://en.wikipedia.org/wiki/Drilling_Mudhttp://en.wikipedia.org/wiki/Painthttp://en.wikipedia.org/wiki/Synovial_fluidhttp://en.wikipedia.org/wiki/Synovial_fluidhttp://en.wikipedia.org/wiki/Cerebral_spinal_fluidhttp://en.wikipedia.org/wiki/Cerebral_spinal_fluidhttp://en.wikipedia.org/wiki/Honeyhttp://en.wikipedia.org/wiki/Shear_thickeninghttp://en.wikipedia.org/wiki/Shear_thickeninghttp://en.wikipedia.org/wiki/Viscosityhttp://en.wikipedia.org/wiki/Non-Newtonian_fluid#cite_note-padb-2http://en.wikipedia.org/wiki/Quicksandhttp://en.wikipedia.org/wiki/Quicksandhttp://en.wikipedia.org/wiki/Shear_thinninghttp://en.wikipedia.org/wiki/Shear_thinninghttp://en.wikipedia.org/wiki/Viscosityhttp://en.wikipedia.org/wiki/Non-Newtonian_fluid#cite_note-3http://en.wikipedia.org/wiki/Non-Newtonian_fluid#cite_note-4http://en.wikipedia.org/wiki/Ice_sheet_dynamicshttp://en.wikipedia.org/wiki/Bloodhttp://en.wikipedia.org/wiki/Generalized_Newtonian_fluidhttp://en.wikipedia.org/wiki/Generalized_Newtonian_fluidhttp://en.wikipedia.org/wiki/Blood_plasmahttp://en.wikipedia.org/wiki/Blood_plasmahttp://en.wikipedia.org/wiki/Blood_plasmahttp://en.wikipedia.org/wiki/Custardhttp://en.wikipedia.org/w/index.php?title=Non-Newtonian_fluid&action=edit&section=3http://en.wikipedia.org/wiki/Dilatanthttp://en.wikipedia.org/wiki/All_wheel_drivehttp://en.wikipedia.org/wiki/Viscous_coupling_unithttp://en.wikipedia.org/w/index.php?title=Non-Newtonian_fluid&action=edit&section=4http://en.wikipedia.org/wiki/Viscoelasticity#Types_of_viscoelasticityhttp://en.wikipedia.org/wiki/Rheopectyhttp://en.wikipedia.org/wiki/Viscosityhttp://en.wikipedia.org/wiki/Non-Newtonian_fluid#cite_note-springer1-0http://en.wikipedia.org/wiki/Lubricanthttp://en.wikipedia.org/wiki/Whipped_creamhttp://en.wikipedia.org/wiki/Whipped_creamhttp://en.wikipedia.org/wiki/Thixotropyhttp://en.wikipedia.org/wiki/Viscosityhttp://en.wikipedia.org/wiki/Non-Newtonian_fluid#cite_note-springer2-1http://en.wikipedia.org/wiki/Drilling_Mudhttp://en.wikipedia.org/wiki/Painthttp://en.wikipedia.org/wiki/Synovial_fluidhttp://en.wikipedia.org/wiki/Synovial_fluidhttp://en.wikipedia.org/wiki/Cerebral_spinal_fluidhttp://en.wikipedia.org/wiki/Cerebral_spinal_fluidhttp://en.wikipedia.org/wiki/Honeyhttp://en.wikipedia.org/wiki/Shear_thickeninghttp://en.wikipedia.org/wiki/Shear_thickeninghttp://en.wikipedia.org/wiki/Viscosityhttp://en.wikipedia.org/wiki/Non-Newtonian_fluid#cite_note-padb-2http://en.wikipedia.org/wiki/Quicksandhttp://en.wikipedia.org/wiki/Quicksandhttp://en.wikipedia.org/wiki/Shear_thinninghttp://en.wikipedia.org/wiki/Shear_thinninghttp://en.wikipedia.org/wiki/Viscosityhttp://en.wikipedia.org/wiki/Non-Newtonian_fluid#cite_note-3http://en.wikipedia.org/wiki/Non-Newtonian_fluid#cite_note-4http://en.wikipedia.org/wiki/Ice_sheet_dynamicshttp://en.wikipedia.org/wiki/Bloodhttp://en.wikipedia.org/wiki/Generalized_Newtonian_fluidhttp://en.wikipedia.org/wiki/Generalized_Newtonian_fluidhttp://en.wikipedia.org/wiki/Blood_plasmahttp://en.wikipedia.org/wiki/Blood_plasmahttp://en.wikipedia.org/wiki/Custardhttp://en.wikipedia.org/w/index.php?title=Non-Newtonian_fluid&action=edit&section=3http://en.wikipedia.org/wiki/Dilatanthttp://en.wikipedia.org/wiki/All_wheel_drivehttp://en.wikipedia.org/wiki/Viscous_coupling_unithttp://en.wikipedia.org/w/index.php?title=Non-Newtonian_fluid&action=edit&section=4

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A familiar example of the opposite, a shear thinning fluid, or

pseudoplastic fluid, is paint: one wants the paint to flow readily off the

brush when it is being applied to the surface being painted, but not to

drip excessively.

[edit]Bingham plastic

There are fluids which have a linear shear stress/shear strain

relationship which require a finite yield stress before they begin to flow

(the plot of shear stress against shear strain does not pass through the

origin). These fluids are called Bingham plastics. Several examples are

clay suspensions, drilling mud, toothpaste, mayonnaise, chocolate, and

mustard.

[edit]Rheopectic

There are also fluids whose strain rate is a function of time. Fluids that

require a gradually increasing shear stress to maintain a constant strain

rate are referred to as rheopectic. An opposite case of this, is a fluid

that thins out with time and requires a decreasing stress to maintain a

constant strain rate (thixotropic).

[edit]Examples

[edit]Oobleck

Oobleck on a subwoofer. Applying force to oobleck, by sound waves in this

case, makes the non-Newtonian fluid thicken.[6]

An inexpensive, non-toxic example of a non-Newtonian fluid is a

suspension of starch (e.g. cornflour) in water, sometimes called "oobleck"

or "ooze" (2 parts corn starch to 1 part water).[7][8] Uncooked imitation

custard, being a suspension of primarily cornflour, has the same

properties. The name "oobleck" is derived from the children's

book Bartholomew and the Oobleck.

[edit]Flubber

http://en.wikipedia.org/wiki/Shear_thinninghttp://en.wikipedia.org/wiki/Painthttp://en.wikipedia.org/w/index.php?title=Non-Newtonian_fluid&action=edit&section=5http://en.wikipedia.org/wiki/Bingham_plastichttp://en.wikipedia.org/w/index.php?title=Non-Newtonian_fluid&action=edit&section=6http://en.wikipedia.org/wiki/Rheopectichttp://en.wikipedia.org/wiki/Thixotropichttp://en.wikipedia.org/w/index.php?title=Non-Newtonian_fluid&action=edit&section=7http://en.wikipedia.org/w/index.php?title=Non-Newtonian_fluid&action=edit&section=8http://en.wikipedia.org/wiki/Non-Newtonian_fluid#cite_note-5http://en.wikipedia.org/wiki/Toxicityhttp://en.wikipedia.org/wiki/Starchhttp://en.wikipedia.org/wiki/Cornflourhttp://en.wikipedia.org/wiki/Non-Newtonian_fluid#cite_note-Oobleck:_The_Dr._Seuss_Science_Experiment-6http://en.wikipedia.org/wiki/Non-Newtonian_fluid#cite_note-Outrageous_Ooze-7http://en.wikipedia.org/wiki/Bird's_Custardhttp://en.wikipedia.org/wiki/Bird's_Custardhttp://en.wikipedia.org/wiki/Bartholomew_and_the_Oobleckhttp://en.wikipedia.org/w/index.php?title=Non-Newtonian_fluid&action=edit&section=9http://en.wikipedia.org/wiki/File:Corn_speaker.jpghttp://en.wikipedia.org/wiki/File:Corn_speaker.jpghttp://en.wikipedia.org/wiki/Shear_thinninghttp://en.wikipedia.org/wiki/Painthttp://en.wikipedia.org/w/index.php?title=Non-Newtonian_fluid&action=edit&section=5http://en.wikipedia.org/wiki/Bingham_plastichttp://en.wikipedia.org/w/index.php?title=Non-Newtonian_fluid&action=edit&section=6http://en.wikipedia.org/wiki/Rheopectichttp://en.wikipedia.org/wiki/Thixotropichttp://en.wikipedia.org/w/index.php?title=Non-Newtonian_fluid&action=edit&section=7http://en.wikipedia.org/w/index.php?title=Non-Newtonian_fluid&action=edit&section=8http://en.wikipedia.org/wiki/Non-Newtonian_fluid#cite_note-5http://en.wikipedia.org/wiki/Toxicityhttp://en.wikipedia.org/wiki/Starchhttp://en.wikipedia.org/wiki/Cornflourhttp://en.wikipedia.org/wiki/Non-Newtonian_fluid#cite_note-Oobleck:_The_Dr._Seuss_Science_Experiment-6http://en.wikipedia.org/wiki/Non-Newtonian_fluid#cite_note-Outrageous_Ooze-7http://en.wikipedia.org/wiki/Bird's_Custardhttp://en.wikipedia.org/wiki/Bird's_Custardhttp://en.wikipedia.org/wiki/Bartholomew_and_the_Oobleckhttp://en.wikipedia.org/w/index.php?title=Non-Newtonian_fluid&action=edit&section=9

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Main article:Flubber (material)

Flubber is a non-Newtonian fluid, easily made from polyvinyl

alcohol based glues and borax, that flows under low stresses, but breaks

under higher stresses and pressures. This combination of fluid-like andsolid-like properties makes it a Maxwell solid. Its behavior can also be

described as being viscoplastic orgelatinous.[9]

[edit]Chilled caramel topping

Another example of this is chilled caramel ice cream topping. The sudden

application of forcefor example by stabbing the surface with a finger,

or rapidly inverting the container holding itleads to the fluid behaving

like a solid rather than a liquid. This is the "shear thickening" property of

this non-Newtonian fluid. More gentle treatment, such as slowly insertinga spoon, will leave it in its liquid state. Trying to jerk the spoon back out

again, however, will trigger the return of the temporary solid state. A

person moving quickly and applying sufficient force with their feet can

literally walk across such a liquid.

[edit]Silly Putty

Main article:Silly Putty

Silly Putty is a silicone polymer based suspension which will flow, bounce,

or break depending on strain rate.

[edit]Ketchup

Ketchup is a shear thinning fluid.[3] Shear thinning means that the fluid

viscosity decreases over time given a constant shear. In other words,

fluid motion is initially difficult to start, but once flowing will continue to

do so freely.

[edit]See also

Bingham plastic

Complex fluid

Dissipative particle dynamics

Newtonian fluid

HerschelBulkley fluid

NavierStokes equations

Pseudoplastic

Dilatant Quicksand

http://en.wikipedia.org/wiki/Flubber_(material)http://en.wikipedia.org/wiki/Polyvinyl_alcoholhttp://en.wikipedia.org/wiki/Polyvinyl_alcoholhttp://en.wikipedia.org/wiki/Gluehttp://en.wikipedia.org/wiki/Boraxhttp://en.wikipedia.org/wiki/Maxwell_solidhttp://en.wikipedia.org/wiki/Viscoplasticityhttp://en.wikipedia.org/wiki/Gelatinoushttp://en.wikipedia.org/wiki/Gelatinoushttp://en.wikipedia.org/wiki/Non-Newtonian_fluid#cite_note-8http://en.wikipedia.org/w/index.php?title=Non-Newtonian_fluid&action=edit&section=10http://en.wikipedia.org/wiki/Ice_creamhttp://en.wikipedia.org/wiki/Forcehttp://en.wikipedia.org/wiki/Solidhttp://en.wikipedia.org/w/index.php?title=Non-Newtonian_fluid&action=edit&section=11http://en.wikipedia.org/wiki/Silly_Puttyhttp://en.wikipedia.org/wiki/Suspension_(chemistry)http://en.wikipedia.org/w/index.php?title=Non-Newtonian_fluid&action=edit&section=12http://en.wikipedia.org/wiki/Ketchuphttp://en.wikipedia.org/wiki/Shear_thinninghttp://en.wikipedia.org/wiki/Non-Newtonian_fluid#cite_note-padb-2http://en.wikipedia.org/wiki/Shearhttp://en.wikipedia.org/w/index.php?title=Non-Newtonian_fluid&action=edit&section=13http://en.wikipedia.org/wiki/Bingham_plastichttp://en.wikipedia.org/wiki/Complex_fluidhttp://en.wikipedia.org/wiki/Dissipative_particle_dynamicshttp://en.wikipedia.org/wiki/Newtonian_fluidhttp://en.wikipedia.org/wiki/Herschel%E2%80%93Bulkley_fluidhttp://en.wikipedia.org/wiki/Navier%E2%80%93Stokes_equationshttp://en.wikipedia.org/wiki/Pseudoplastichttp://en.wikipedia.org/wiki/Dilatanthttp://en.wikipedia.org/wiki/Quicksandhttp://en.wikipedia.org/wiki/Flubber_(material)http://en.wikipedia.org/wiki/Polyvinyl_alcoholhttp://en.wikipedia.org/wiki/Polyvinyl_alcoholhttp://en.wikipedia.org/wiki/Gluehttp://en.wikipedia.org/wiki/Boraxhttp://en.wikipedia.org/wiki/Maxwell_solidhttp://en.wikipedia.org/wiki/Viscoplasticityhttp://en.wikipedia.org/wiki/Gelatinoushttp://en.wikipedia.org/wiki/Non-Newtonian_fluid#cite_note-8http://en.wikipedia.org/w/index.php?title=Non-Newtonian_fluid&action=edit&section=10http://en.wikipedia.org/wiki/Ice_creamhttp://en.wikipedia.org/wiki/Forcehttp://en.wikipedia.org/wiki/Solidhttp://en.wikipedia.org/w/index.php?title=Non-Newtonian_fluid&action=edit&section=11http://en.wikipedia.org/wiki/Silly_Puttyhttp://en.wikipedia.org/wiki/Suspension_(chemistry)http://en.wikipedia.org/w/index.php?title=Non-Newtonian_fluid&action=edit&section=12http://en.wikipedia.org/wiki/Ketchuphttp://en.wikipedia.org/wiki/Shear_thinninghttp://en.wikipedia.org/wiki/Non-Newtonian_fluid#cite_note-padb-2http://en.wikipedia.org/wiki/Shearhttp://en.wikipedia.org/w/index.php?title=Non-Newtonian_fluid&action=edit&section=13http://en.wikipedia.org/wiki/Bingham_plastichttp://en.wikipedia.org/wiki/Complex_fluidhttp://en.wikipedia.org/wiki/Dissipative_particle_dynamicshttp://en.wikipedia.org/wiki/Newtonian_fluidhttp://en.wikipedia.org/wiki/Herschel%E2%80%93Bulkley_fluidhttp://en.wikipedia.org/wiki/Navier%E2%80%93Stokes_equationshttp://en.wikipedia.org/wiki/Pseudoplastichttp://en.wikipedia.org/wiki/Dilatanthttp://en.wikipedia.org/wiki/Quicksand

7/28/2019 sistem-nonnewton.doc

8/8

Rheology

Superfluids

[edit]References

1. ^ Springer handbook of experimental fluid mechanics, Cameron

Tropea, Alexander L. Yarin, John F. Foss, Publisher: Springer, 9

October 2007, ISBN 3540251413, ISBN 978-3540251415,

p.676,Google books

2. ^ Springer handbook of experimental fluid mechanics, Cameron

Tropea, Alexander L. Yarin, John F. Foss, Publisher: Springer, 9

October 2007, ISBN 3540251413, ISBN 978-3540251415,

p.661,Google books3. ^ ab Pump Application Desk Book, 3rd edition, Paul N. Garay,

Prentice Hall, August 1996, ISBN 0881732311, ISBN 978-

0881732313, p.358, Google books

4. ^ Rheology of Fluid and Semisolid Foods: Principles and

Applications, M. A. Rao, Publisher: Springer, 2nd edition, 28 August

2007, ISBN 0387709290, ISBN 978-0387709291, p.8, Google

books

5. ^ Emulsions, Foams, and Suspensions: Fundamentals andApplications, Laurier L. Schramm, Publisher: Wiley VCH, 26 July

2005, ISBN 3527307435, ISBN 978-3527307432p.173, Google

books

6. ^ This demonstration of oobleck is a popular subject for YouTube

videos, such as this.

7. ^ Oobleck: The Dr. Seuss Science Experiment

8. ^ Outrageous Ooze

9. ^ Glurch Meets Oobleck. Iowa State University Extension.

http://en.wikipedia.org/wiki/Non-Newtonian_fluid

2011-02-21

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_ref-8http://www.extension.iastate.edu/e-set/science_is_here/glurch.htmlhttp://en.wikipedia.org/wiki/Non-Newtonian_fluid