Coz poiseuille eq is for poiseuille flow, which is a laminar flow, not turbulent flow. And it also need to be a fully developed , pressure driven flow.
The equation assumes steady state or laminar flow and hence cannot be used for turbulent flows.
You cannot use Bernoulli's equation because the rocks would create a turbulent flow and you need a steady flow to use Bernoulli's equation. It could (in theory) but you would need accurate measurements of size shape and placement of each of the rocks involved. It would be a nightmare just to accumulate the data.
Smoke rising from a flame. At first the smoke rises with laminar flow before becoming turbulent just a few centimetres above the source.
there are many empirical constellations in turbulent flow depending upon the conditions like whether flow is internal or external, flow over a flat plate of pipe etc. so its better to refer a book on fluid mechanics.
The Reynolds number, Re = VD/υ, can be used to measure the laminarity of flow. The smaller the Reynolds number, the more laminar the flow. Therefore, to achieve better laminar flow, V and D (velocity of fluid and diameter of pipe) should be small and υ, the kinematic viscosity of the fluid, should be large. Therefore, since pipe diameter and viscosity is fixed in this circumstance, the slower the velocity of the flow, the more laminar the flow. Open the faucet to a small degree and the flow will be laminar. Turn the facet open fully will (for some faucets) cause turbulent flow depending on the maximum velocity of water allowed by the faucet.
Poiseuille Equation can only be applied to laminar flow.
Also known as: Hagen-Poiseuille law, Poiseuille law and Poiseuille equation.
The Poiseuille equation is derived from the Navier-Stokes equation for incompressible fluid flow in a cylindrical pipe, assuming laminar flow and steady state conditions. By applying assumptions of no-slip boundary conditions and conservation of mass and momentum, the equation simplifies to describe the flow rate in terms of viscosity, pressure gradient, and geometry of the pipe.
Turbulent flow
yes, as long as it is assumed the substance is incompressible.
The equation assumes steady state or laminar flow and hence cannot be used for turbulent flows.
The equation for turbulent flow is described by the Navier-Stokes equations, which are a set of partial differential equations that describe how the velocity field of a fluid evolves over time. These equations take into account the fluid's viscosity, density, and the forces acting upon it. Turbulent flow is a complex, chaotic motion characterized by irregular fluctuations in velocity and pressure within the fluid.
gago..
Turbulent flow transports more sediment than laminar flow due to the increased velocity and mixing of particles in turbulent flow. This helps to keep sediments suspended and advected downstream more effectively.
a block, Ping Pong ball or golf ball, kite, or simply running in the shallow pool. There are alot of things that have turbulent flow..... ping pong balls do not have turbulent flow nor does golf balls it has laminar flow things that have turbulent flow would be a bus, a hand out the window in a y axis or just a simple building or sky scrapper basically anything with a flat surface has turbulent flow
Increasing the velocity of the fluid will cause a laminar flow to become turbulent.
linear