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Heat and Mass Transfer
Wall Shear Stress in Heat and Mass Transfer Formulas
Wall shear stress is defined as the shear stress in the layer of fluid next to the wall of a pipe. And is denoted by τ
w
. Wall Shear Stress is usually measured using the Pascal for Pressure. Note that the value of Wall Shear Stress is always negative.
Formulas to find Wall Shear Stress in Heat and Mass Transfer
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Wall shear stress
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f
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Local shear stress
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Heat and Mass Transfer formulas that make use of Wall Shear Stress
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Local friction coefficient for external flow
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f
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Density given local friction coefficient
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f
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Free stream velocity given local friction coefficient
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List of variables in Heat and Mass Transfer formulas
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Local Friction Coefficient
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f
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Density
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f
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Free Stream Velocity
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f
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Density of Fluid
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f
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Local Reynolds Number
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FAQ
What is the Wall Shear Stress?
Wall shear stress is defined as the shear stress in the layer of fluid next to the wall of a pipe. Wall Shear Stress is usually measured using the Pascal for Pressure. Note that the value of Wall Shear Stress is always negative.
Can the Wall Shear Stress be negative?
Yes, the Wall Shear Stress, measured in Pressure can be negative.
What unit is used to measure Wall Shear Stress?
Wall Shear Stress is usually measured using the Pascal[Pa] for Pressure. Kilopascal[Pa], Bar[Pa], Pound Per Square Inch[Pa] are the few other units in which Wall Shear Stress can be measured.
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