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  • ME 116 Fluid Mechanics Chapter 8: Minor Losses

    Fall 2014

    Deify Law

  • Major and Minor Losses

    Major losses are only applicable to pipes

    Minor losses are only applicable to fittings, valves, and minor piping components.

  • Minor Losses

    Valves

    Bends

    Tees

    Elbows

    min

    221/ 2

    2

    ,Re

    L orL

    L

    h pK

    V gV

    K geometry

  • Loss Coefficient of Entrance Flow

    Conditions

    KL= 0.5 KL= 0.8

    KL= 0.2 KL= 0.04

  • Edge-Rounding Effects

  • Loss Coefficient of Exit Flow

    Conditions

    KL = 1.0

    For all

    cases

  • Loss Coefficient for a Sudden

    Contraction

  • Loss Coefficient for a Sudden

    Expansion

  • 90 Degree Bend

  • Gradual Bend Instead of an Elbow

  • Threaded and Flanged Elbow

    Threaded

    Flanged Source: Grainger Company

    Threaded loss is always

    greater than the Flanged loss


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