Transport II Dimensionless Groups

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28 Terms

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Biot Number

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Drag Coefficient

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Froude Number (Fr)

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Definition of Biot Number

external heat transfer/internal heat transfer

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Definition of Drag Coefficient

Drag/inertial forces

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Froude Number Definition

inertial forces/gravitational forces

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Grashof Number (Gr)

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Grashof Number Definition

buoyancy due to thermal expansion/viscous dissipation

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Nusselt Number (Nu)

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Nusselt Number Definition

total heat transfer/conductive heat transfer

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Peclet Number (Pe)

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Peclet Number Definition

convection/diffusion

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Prandtl Number (Pr)

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Definition of Prandtl Number

momentum diffusivity/thermal diffusivity

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Rayleigh Number (Ra)

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Definition of Rayleigh Number

buoyancy due to thermal expansion/dissipation

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Reynolds Number (Re)

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Definition of Reynolds Number

inertial forces/viscous forces

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Womersley Number (alpha)

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Womersley number Definition

penetration depth/tube length

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<p>=Nu/(RePr)</p>

=Nu/(RePr)

Stanton Number

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Stanton Number Definition

heat transfer/convective heat transfer

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fanning friction factor

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definition of fanning friction factor

wall shear stress/dynamic pressure

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<p>= ff/2</p>

= ff/2

Colburn Analogy

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h=~ p*Uinf*Cp(ff/2)Pr^(-2/3)

Colburn Analogy

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Schmidt Number (Sc)

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Definition of Schmidt Number

momentum diffusivity/mass diffusion