nserv5, - For a COMPRESSIBLE FLUID: The density of a gas...

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For a COMPRESSIBLE FLUID: The density of a gas may change significantly with changes in pressure and temperature , however since the density of gases is small, the pressure gradient in the vertical direction is correspondingly small. But for situations in which the variations in heights are large, attention must be given to changes in specific weight, γ . If the ideal gas assumption is made,
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For a COMPRESSIBLE FLUID: By separating variables: If temperature is constant (i.e. T=T 0 ):
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MEASUREMENT OF FLUID PRESSURE: A standard technique for measuring pressure involves the use of liquid columns in vertical or inclined tubes, which are called manometers .
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The simplest type of manometer consists of a vertical tube, open at the top, and attached to the contained in which the pressure is measured. The equation p= γ h+p 0 gives the absolute pressure. The major disadvantages are: s It is only usable for liquids s Suction pressures can not be measured s Pressure to be measured must be relatively small, so that the required height of the column is reasonable. h
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This note was uploaded on 03/19/2011 for the course AEE 300 taught by Professor Beşyüz during the Spring '11 term at Middle East Technical University.

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nserv5, - For a COMPRESSIBLE FLUID: The density of a gas...

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