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An ideal fluid is a fluid that is incompressible and has no internal resistance to flow (zero viscosity). In addition ideal fluid particles undergo no rotation about their center of mass (irrotational).
An ideal fluid is a fluid that is incompressible and has no internal resistance to flow (zero viscosity). In addition ideal fluid particles undergo no rotation about their center of mass (irrotational).
An ideal fluid:
An ideal fluid:
- is incompressible.
Compressible vs incompressible flow
Compressible vs incompressible flow
All fluids are compressible to some extent—that is, changes in pressure or temperature will result in changes in density. However, in many situations the changes in pressure and temperature are so small that the changes in density are negligible. In such cases, the flow can be modeled as an incompressible flow.
All fluids are compressible to some extent—that is, changes in pressure or temperature will result in changes in density. However, in many situations the changes in pressure and temperature are so small that the changes in density are negligible. In such cases, the flow can be modeled as an incompressible flow.
- has no internal resistance to flow (zero viscosity).
Viscous vs inviscid flow
Viscous vs inviscid flow
Viscous problems are those in which fluid friction has significant effects on the solution. The Reynolds number can be used to evaluate whether viscous or inviscid equations are appropriate to the problem. Stokes flow is flow at very low Reynolds numbers, such that inertial forces can be neglected compared to viscous forces.
Viscous problems are those in which fluid friction has significant effects on the solution. The Reynolds number can be used to evaluate whether viscous or inviscid equations are appropriate to the problem. Stokes flow is flow at very low Reynolds numbers, such that inertial forces can be neglected compared to viscous forces.
- undergoes no rotation about their center of mass (irrotational).
Steady vs unsteady flow
Steady vs unsteady flow
Turbulent flows are unsteady by definition. Turbulence is flow dominated by recirculation, eddies, and apparent randomness because of internal friction caused by the molecular cohesion between the particles.
Turbulent flows are unsteady by definition. Turbulence is flow dominated by recirculation, eddies, and apparent randomness because of internal friction caused by the molecular cohesion between the particles.
Laminar flow is a type of flow pattern of a fluid in which all the particles are flowing in parallel lines, opposed to turbulent flow, where the particles flow in random and chaotic directions. ... The more viscous, or thick, the fluid is the faster it can flow without going turbulent.
Laminar flow is a type of flow pattern of a fluid in which all the particles are flowing in parallel lines, opposed to turbulent flow, where the particles flow in random and chaotic directions. ... The more viscous, or thick, the fluid is the faster it can flow without going turbulent.
Why Laminar Flow is AWESOME - Smarter Every Day
Why Laminar Flow is AWESOME - Smarter Every Day
Explore pressure in the atmosphere and underwater. Reshape a pipe to see how it changes fluid flow speed. Experiment with a leaky water tower to see how the height and water level determine the water trajectory.
Explore pressure in the atmosphere and underwater. Reshape a pipe to see how it changes fluid flow speed. Experiment with a leaky water tower to see how the height and water level determine the water trajectory.
Ideal fluids
Ideal fluids
Incompressible – the density is constant
Incompressible – the density is constant
Irrotational – the flow is smooth, no turbulence (Laminar)
Irrotational – the flow is smooth, no turbulence (Laminar)
Nonviscous –(Inviscid) fluid has no internal friction ( η = 0)
Nonviscous –(Inviscid) fluid has no internal friction ( η = 0)
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