Is hydraulic fluid highly compressible?

The values usually are determined by laboratory methods that take special precautions to degas the fluid before it is trapped and compressed. However, hydraulic fluids typically become aerated in use. Aeration has a significant effect on bulk modulus because air is much more compressible than oil.Aug 9, 2007 read more

Compressible vs Incompressible Fluids Fluids are either gases or liquids that take the shape of the container. In fluid dynamics, the compressibility of a fluid is a very important factor. In nature, all the fluids are compressible, but we define incompressible fluids for our convenience of study. read more