Have you ever witnessed the flow of oil through a clear pipe? the fluid layer near the pipe barely moves. Meanwhile, the next layer of fluid moves faster. So, the fastest speed is the velocity of the fluid layer in the middle of the pipe. This is different from the flow of water. Almost all layers of water move at the same speed. From here, we know the viscosity. Well, this viscosity is a measure of the thickness of a fluid stream.
#ViscousFlow #NonViscousFlowl #FluidMechanics
#ViscousFlow #NonViscousFlowl #FluidMechanics
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LearningTranscript
00:01To understand viscous flow, consider the following pipe.
00:06Let's just say that the bottom of the pipe is the x-axis, and the height of the pipe is the y-axis.
00:14Fluid flows from left to right.
00:19Well, this fluid is composed of a number of particles.
00:23Let's assume that this row of particles moves horizontally.
00:31During its movement, this row of particles rubs against other rows of particles.
00:37A row of particles above it, and a row of particles below it,
00:41causes the particle's speed to decrease.
00:45When all rows of particles move, each row of particles will have a different speed.
00:53The row of particles near the surface of the pipe barely moves.
00:58Furthermore, the speed of the row of particles above it moves faster
01:02when compared to the row of particles below it.
01:06So the speed of the fastest row is the row of particles in the middle of the pipe.
01:13Thus, viscous flow is a form of fluid flow due to the friction process
01:18between one fluid layer and another fluid layer.
01:21The measure of friction between layers of fluid is the viscosity value of the fluid.
01:31To describe this movement, we can create a velocity profile.
01:39The higher the viscosity, the higher the friction force between fluid layers.
01:52If a fluid has a viscosity of zero, then each row of particles will have the same speed.
01:59This flow is known as inviscid flow.
02:04In terms of the velocity function, the shape is almost flat.
02:09The velocity of the fluid is the same as the velocity of the particles.
02:13This flow is known as inviscid flow.
02:17In terms of the velocity function, the shape is almost flat.
02:26Yup, hopefully this tutorial can give you an idea of what viscous flow and inviscid flow are.
02:32And don't forget to watch the next video.