It is important to underline the difference between an “incompressible flow” and an “incompressible fluid”: while the first is a characteristic of the flow, the second is a characteristic of the material. All fluids are apriori compressible but many are considered to be incompressible because...
There are of course differences between liquids and gases. Gases are easily compressed whereas liquids are nearly incompressible. A liquid has definite size but a gas expands to fill any closed vessel containing it. However, in discussing the mechanical behavior of fluids we use only the properties...
What Are Fluids? In fluid mechanics, a fluid refers to a substance that can flow and has the ability to deform under applied shear stress. It can include both liquids and gases. Fluids possess properties such as density, viscosity, and compressibility, which play significant ro...
Identify some substances that are incompressible and some that are not. The SI unit of coefficient of viscosity is what? Define streamline flow. Why Bernoulli's theorem is not applicable to viscous fluid? What is the SI unit of the electric flux?
As gases and liquids are fluids, the following information must be considered: Gas (e.g. air), is a compressible fluid, which changes its volume at different pressures. Liquids (e.g. water), are considered incompressible fluid, so their volume is constant at different pressures. If...
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Question: What are some examples of Bernoulli's principle? Bernoulli's principle: Bernoulli's principle follows the conservation of energy principle. Bernoulli's principle applies to fluids (both liquid and gaseous). According to Bernoulli's principle, the sum of pressure energy, kinetic energy, an...
The complicated nature of fluid flow makes modeling it on a computer inherently difficult. Multiphysics interactions, nonlinearity, and unsteadiness are some of the complexities that make analyzing fluids so challenging. Multiphysics interactions:Fluids don’t usually flow in isolation: they flow within,...
When the Mach number is very low, it is OK to assume that the flow is incompressible. This is often a good approximation for liquids, which are much less compressible than gases. In that case, the density is assumed to be constant and the continuity equation reduces to ∇⋅u=0. The...
Identify some substances that are incompressible and some that are not. What is the unit used for viscosity? Could life exist in the form of light? What about liquid? Or gas? What is the substance having no charge? Why is cooling correction necessary in liquids? Why should liquids never b...