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.
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.
Smoke rising from a flame. At first the smoke rises with laminar flow before becoming turbulent just a few centimetres above the source.
The maximum cubic feet per minute (CFM) that can flow through a 12-inch inner diameter (ID) pipe at 100 psi depends on various factors, including the type of fluid, temperature, and flow conditions (laminar or turbulent). Generally, for compressed air, the flow rate can exceed 1,500 CFM under these conditions, but exact calculations would require more specific details about the system. For precise engineering applications, using flow equations or software that accounts for these factors is recommended.
To determine the cubic feet per minute (CFM) of a 2-inch pipe at 90 psi, you typically need to consider factors such as the flow velocity, pressure drop, and whether the flow is laminar or turbulent. Using standard flow equations or charts for compressed air or fluid dynamics, a 2-inch pipe at 90 psi can generally deliver around 130 to 200 CFM, depending on the specific application and conditions. For precise calculations, it's advisable to consult flow tables or perform calculations based on the specific system design and requirements.
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.
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.
Turbulent flow
H. Snel has written: 'A semi-empirical model for the development of a round turbulent jet in a cross flow'
Julius E Harris has written: 'Computer program for solving laminar, transitional, or turbulent compressible boundary-layer equations for two-dimensional and axisymmetric flow' -- subject(s): Mathematical models, Turbulent boundary layer, Boundary layer, Laminar flow
Turbulent flow allows for better mixing and heat transfer in fluids compared to laminar flow. It can also help prevent boundary layer separation and increase energy dissipation in the system. Additionally, turbulent flow enhances mass transport and can lead to more efficient industrial processes.
gago..
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
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.
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.
Increasing the velocity of the fluid will cause a laminar flow to become turbulent.
Advantage: objects in a turbulent flow experience less drag. Disadvantage: turbulent flows are unstable meaning velocity and pressures change rapidly. The objects in the flow have less stability. The flow also is more difficult to model then a laminar flow.
Advantages of turbulent flow include increased mixing and heat transfer rates, which can be beneficial in certain industrial processes. However, turbulent flow also requires higher energy inputs and can result in increased frictional losses compared to laminar flow. Additionally, it can be more challenging to predict and model turbulent flow behavior accurately.