Distinguish between:Compressible and incompressible flow.
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Incompressible And Compressible Flow. Incompressible flow refers to the fluid flow in which the fluid's density is constant. For a density to remain constant, the control volume has to remain constant. Even though the pressure changes, the density will be constant for an incompressible flow.
Liquids have little compressibility. Water, for example, will compress by only 46.4 parts per million for every unit increase in atmospheric pressure (bar). At around 4000 bar (58,000 psi) of pressure, at room temperature, water only experiences an 11% decrease in volume.
Incompressible And Compressible Flow. Incompressible flow refers to the fluid flow in which the fluid's density is constant. For a density to remain constant, the control volume has to remain constant. Even though the pressure changes, the density will be constant for an incompressible flow.
Liquids have little compressibility. Water, for example, will compress by only 46.4 parts per million for every unit increase in atmospheric pressure (bar). At around 4000 bar (58,000 psi) of pressure, at room temperature, water only experiences an 11% decrease in volume.
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