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What is the meaning of incompressible fluid?

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An incompressible fluid is a fluid whose density does not change when the pressure changes. ... In most cases, since the fluid is usually all the same substance, treating the flow as incompressible is accomplished by taking the density to be the same everywhere in the flow field. read more

If the change in fluid density or volume is less than 5% for particular change in pressure, we can say fluid is incompressible or incompressible fluid. Next is compressible or incompressible flow, it is when there is flow taking place and fluid medium having velocity ā€˜Vā€™. read more

Incompressible fluids and solids will not change in volume if a pressure is applied. If the density changes have negligible effects on the solution, the fluid is called incompressible and the changes in density are ignored. read more

Incompressible flow does not mean that the density is constant. If the ratio of change in density to density is less than 5%, the flow can be considered as incompressible. The corresponding Mach number would be around 0.3. This is usually assumed to minimize the mathematical complexity for solving fluid flow problems. read more

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Incompressible definition and meaning
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