Fluid statics is the area of fluid mechanics that involves the study of sort of motion, fall under the other field of fluid mechanics, fluid dynamics. Fluid statics or hydrostatics is the branch of fluid mechanics that studies "fluids at rest and the pressure in a fluid or exerted by a fluid on an immersed body." It encompasses the study of the conditions under which fluids are at rest in stable equilibrium as opposed to fluid dynamics, the study. Learn complete Physics Video Lectures on Fluid Statics & Dynamics for IIT.


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The height of this pipe is the same as the line carved into the interior of the cup. The cup may be filled to the line fluid statics and dynamics any fluid passing into the pipe in the center of the cup.

However, when the amount of fluid exceeds this fill line, fluid will overflow into the pipe fluid statics and dynamics the center of the cup. Due to the drag that molecules exert on one another, the cup will be emptied.

Heron's fountain Heron's fountain is a device invented by Heron of Alexandria that consists of a jet of fluid being fed by a reservoir of fluid. The fountain is constructed in such a way that the height of the jet exceeds the height of the fluid in the reservoir, apparently in violation of principles of hydrostatic pressure.

The device consisted of an opening and two containers arranged one above the other. As a rough guide, compressible effects fluid statics and dynamics be ignored at Mach numbers below approximately 0.

For liquids, whether the incompressible assumption is valid depends on the fluid properties specifically the critical pressure and temperature of the fluid and the flow conditions how close to the critical pressure the actual flow pressure becomes.

Fluid statics - definition of Fluid statics by The Free Dictionary

Acoustic fluid statics and dynamics always require allowing compressibility, since sound waves are compression waves involving changes in pressure and density of the medium through which they propagate.

Newtonian vs non-Newtonian fluids[ edit ] Flow around an fluid statics and dynamics All fluids are viscous, meaning that they exert some resistance to deformation: Isaac Newton showed that for many familiar fluids such as water and airthe stress due to these viscous forces is linearly related to the strain rate.

Such fluids are called Newtonian fluids. The coefficient of proportionality is called the fluid's viscosity; for Newtonian fluids, it is a fluid property that is independent of the strain rate.

Non-Newtonian fluids have a more complicated, non-linear stress-strain behaviour.

The sub-discipline of rheology describes the stress-strain behaviours of such fluids, which include emulsions and slurriessome viscoelastic materials such as blood and some polymersand sticky liquids such as latexhoney and lubricants. An accelerating parcel of fluid is subject to inertial effects.

The Reynolds number is a dimensionless quantity which characterises the magnitude of inertial effects compared to the magnitude fluid statics and dynamics viscous effects. In such cases, inertial forces are sometimes neglected; this flow regime is called Stokes or creeping flow.

Fluid Statics and Dynamics (Chapter 1) - Flow through Heterogeneous Geologic Media

In high Reynolds number flows, the flow is often modeled as fluid statics and dynamics inviscid flowan approximation in which viscosity is completely neglected. Eliminating viscosity allows the Navier—Stokes equations to be simplified into the Euler equations. The integration of the Euler equations along a streamline in an inviscid flow yields Bernoulli's equation.

When, in addition to being inviscid, the flow is irrotational everywhere, Bernoulli's equation can completely describe the flow everywhere.

Such flows are called potential flowsbecause the velocity field may be expressed as the gradient of a potential energy expression. This idea can work fairly well when the Reynolds number is high.


However, problems such as those involving solid boundaries may require that the viscosity be included. Viscosity cannot be neglected near solid boundaries because the no-slip condition generates a thin region of large strain rate, the boundary layerin which viscosity effects dominate and which fluid statics and dynamics generates fluid statics and dynamics.

Therefore, to calculate net forces on bodies such as wingsviscous flow equations must be used: A commonly used[ citation needed ] model, especially in computational fluid dynamicsis to use two flow models: Notice that the fluid mechanics serves as the fundamental principles in a number of disciplines in science and engineering.

NPTEL :: Aerospace Engineering - Principles of Fluid Dynamics

For instance, atmospheric science is built upon fluid mechanics, as is cardiology — the study of the blood flow through our veins and arteries. The study of the infiltration of water and its subsequent movement in unsaturated subsurface media vadose zone hydrology also relies on fluid mechanics, as do studies of the movement of groundwater in geologic media groundwater hydrology.

Other disciplines include surface hydrology fluid statics and dynamics study of movement of water on land surfaces, in canals and rivers, and in oceans, lakes, estuaries, etc.