Fluid Mechanics Flashcards by Kelly Strecker

Q

When Re<10^3

A

Friction factor (f)
f = 64/Re

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Q

Slope
Given head loss and length

A

H/L

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Q

Ex: force to drag a barge

A

τ = μ(dv/dy)

F = τ/A

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Q

For oil thickness questions you need:

A

Multiple equations to apply to one another

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Q

Terminal velocity for fluid mechanics

A

v = (τy/μ)

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Q

Buoyant force

A

F = Vγ

Or

F = ρVg

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Q

Buoyant forces

Fully submerged object

A

F_b = W_object

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Q

Pressure

A

hγ

Or

hgρ

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Q

γ of a liquid

A

= γ_w* SG_liquid

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Q

Reminder
γ vs SG

A

SG - specific gravity

γ - specific weight

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Q

Absolute pressure

A

Use Bernoulli Eq

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Q

Deflectors

A

when “deflect” is used - find in hand book - use Force eqs

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Q

Q
Discharge

A

Av

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Q

Continuity eq

A

Q_in = Q_out

A1v1 = A2v2

Bernoulli eqs

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