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dmt > DMT 31 - 39 > Flashcards

DMT 31 - 39 Flashcards

1
Q

What is the Symbol Equation for Reynolds number?

A

𝑅𝑒= (πœŒπ‘£_π‘š 𝐷)/πœ‡=(𝑣_π‘š 𝐷)/𝑣

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2
Q

What does the symbols mean in Reynolds number?

A 
𝑣_π‘š:Flow Velocity [m/s]
𝐷:π»π‘¦π‘‘π‘Ÿπ‘Žπ‘™π‘–π‘ π·π‘–π‘Žπ‘šπ‘’π‘‘π‘’π‘Ÿ [π‘š]
πœ‡:π·π‘¦π‘›π‘Žπ‘šπ‘–π‘ π‘‰π‘–π‘ π‘π‘œπ‘ π‘–π‘‘π‘¦ [π‘˜π‘”/π‘š.𝑠]
𝑣=πœ‡/𝜌:πΎπ‘–π‘›π‘’π‘šπ‘Žπ‘‘π‘–π‘ π‘‰π‘–π‘ π‘π‘œπ‘ π‘–π‘‘π‘¦ 
[π‘š^2/𝑠]
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3
Q

What is the Hydraulic Diameter for a Circular Tube?

A

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4
Q

What is the Hydraulic Diameter for a square Duct?

A

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5
Q

What is the Hydraulic Diameter for a Rectangular Duct?

A

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6
Q

What is the Equation for Laminar flow Velocity

A

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7
Q

What is the pressure drop/loss Equation?

A

𝑑𝑃/𝑑π‘₯= βˆ†π‘ƒ/𝐿= (𝑃_2βˆ’π‘ƒ_1)/𝐿

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8
Q

What is the pressure loss Equation for all types of fully developed flows?

A

βˆ†π‘ƒ_𝐿=𝑓 𝐿/𝐷 (πœŒπ‘£^2 π‘š)/2

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9
Q

What is the equation for Darcy Friction Factor?

A

𝑓= 64πœ‡/(πœŒπ·π‘£_π‘š )= 64/𝑅𝑒

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dmt (5 decks)

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