Fluid mechanics – the study of the physics of continuous materials which take the shape of their container.
Fluids – In a mechanical view, a fluid is a substance that does not support tangential stress; that is why a fluid in rest has the shape of their containing vessel.And fluid in rest have zero shear stress
Combined gas law
Rheology – the study of materials with both solid and fluid characteristics
Viscoelasticity Smart fluids
Magnetorheological Electrorheological Ferrofluids Rheometry Rheometer