What is Laminar Flow

8/14/2019 What is Laminar Flow

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What Is Laminar Flow?

Presentation by

Tony Green, B.CheApril 2005

1http://www.tonygreen.name Tony Green 2010


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ApplicationsAeronautics Industry - Air Fuel

Usage of Planes

Semiconductor Industry

InThermal Based Mass Flow

Controllers

Pharmaceutical Industry -Unidirectional Flow in Laminar Flow

Cabinets (Particles)




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What factors determine whether

flow is laminar?Length of pipe defined as L

Diameter of pipe defined as D

which is 2 times the radius (2R=D) Differential Pressure D P from

the pipe inlet to pipe outlet or P2-P1

Density of fluid

Mass per unitVolume

Viscosity of fluid resistance of a

fluid to flow,R




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Please Note:

Viscosity Is Dependent UponTemperature of a Fluid and Refer

to Flow

Density Is Intrinsic to the Fluid and

Does Not Change During Flow



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Flow region is defined byReynolds Equation

RE = D X u X r

h

Where D equals Diameter , u

equals Velocity, r equals density

and h equals viscosity

Dimensionless allows scalability




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Flow Regions:

Laminar = RE < 2100

Transitional = 2100< RE < 4000

Turbulent = RE > 4000




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10http://www.tonygreen.name

Tony Green 2010


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What does the Reynolds Number

really mean?Viscous forces Internal to fluid

Inertial Forces External to fluid

RE of the ratio between Inertial andviscous forces of

FI

RE = ----

Fv

This will determine property of flow


11http://www.tonygreen.name

Tony Green 2010


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Review:

What is Laminar Flow?

What is the difference between

Viscosity and Density?

What is Reynolds Equation?

Laminar flow affect in

applications?


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http://www.tonygreen.name

Tony Green 2010


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Questions?

Thank You very much for your time!

More about the author can be read atthe author website listed below of his

blog at

http://www.markanthonygreen.blogspot.com



What is Laminar Flow

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