What is your assessment of this so far?Swamp Thing said:Is it possible to create (nearly?) laminar flow in a tube with rectangular C.S. , around 1 cm X 5 cm , with air moving at around 100 to 150 m/sec?
Turbulence will likely set in sooner or later, but can the laminar flow be made to last over say 20 cm?
I agree.Swamp Thing said:When I posted, I had got a Reynolds number around 7000. So I was wondering if it would work if we used a sheaf of soda straws or something to laminarize the flow.
But I have since found errors in my calculation -- the RN is actually like 260,000. So it's probably not doable, I'm thinking.
Yes, it is possible to create laminar flow in fast moving air. Laminar flow refers to a smooth, orderly flow of air or fluid, where all particles move in the same direction and at the same speed. While fast moving air typically results in turbulent flow, there are ways to manipulate the air flow to achieve laminar flow.
Laminar flow can be created in fast moving air by using specialized equipment such as flow straighteners, which help to smooth out the air flow and reduce turbulence. Additionally, shaping the surface of the object or using a streamlined design can also help to promote laminar flow.
Laminar flow in fast moving air can offer several benefits, including increased efficiency and reduced drag. This can be particularly useful in applications such as aircraft design, where reducing drag can improve fuel efficiency and speed. Laminar flow can also reduce noise and vibration, leading to a smoother and more comfortable experience for passengers.
While laminar flow can offer many advantages, it is not always feasible to achieve in all situations. Fast moving air or fluid can be difficult to control and turbulence can be difficult to eliminate completely. Additionally, certain factors such as surface roughness and environmental conditions can also affect the ability to create laminar flow.
Laminar flow can be measured and monitored using various techniques such as flow visualization, particle image velocimetry (PIV), and hot-wire anemometry. These methods allow for the visualization and measurement of air flow patterns and velocities, providing valuable data for understanding and improving laminar flow in fast moving air.