The nature of fluid flow is governed by following parameters(i) Mean f...
Osborne Reynolds, an English scientist confirmed the existence of these two regimes experimentally.
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The nature of fluid flow is governed by following parameters(i) Mean f...
Parameters governing fluid flow
Mean flow velocity, density of fluid, and dynamic viscosity of the fluid are the three main parameters that govern fluid flow. Let's understand each parameter in detail.
1. Mean flow velocity
Mean flow velocity is the average velocity of fluid particles in a given flow field. It is an important parameter that determines the behavior of fluid flow. The velocity of the fluid affects the pressure, shear stress, and turbulence in the flow field. The higher the velocity, the greater the pressure and shear stress on the walls of the pipe or channel.
2. Density of fluid
Density of the fluid is the mass per unit volume of the fluid. It is an important parameter that determines the buoyancy and pressure of the fluid. The density of the fluid affects the flow rate, pressure, and velocity of the fluid. The higher the density, the lower the flow rate and velocity, and the higher the pressure.
3. Dynamic viscosity of the fluid
Dynamic viscosity of the fluid is a measure of its resistance to deformation or flow. It is an important parameter that determines the frictional losses in the flow field. The dynamic viscosity of the fluid affects the flow rate, pressure drop, and shear stress in the flow field. The higher the dynamic viscosity, the lower the flow rate and velocity, and the higher the pressure drop and shear stress.
Conclusion
All three parameters, i.e., mean flow velocity, density of fluid, and dynamic viscosity of the fluid, are important in determining the behavior of fluid flow. They affect the pressure, shear stress, and turbulence in the flow field. Therefore, option C, i.e., 1, 2, and 3, is the correct answer.