Sentences with phrase «in turbulent flows»

«People have seen these patterns in turbulent flows for centuries, but we're finding ways to relate the patterns to mathematical equations describing fluid flows,» Grigoriev said.

That math solution describes a point in the turbulent flow that can be worked with to compute a prediction of what the turbulence will do next.

But, from the physical side, not worry about some short time scale stuff is similar to not worrying about velocity fluctuations about a mean in a turbulent flow (for the purpose of curve fitting!)

Not exact matches

Even the researchers who created this image had a tough time interpreting its complex representation how of turbulent fluids flow in three dimensions.

4 For example, the Navier - Stokes equations are used all the time to approximate turbulent fluid flows around aircraft and in the bloodstream, but the math behind them still isn't understood.

The Reynolds number, the ratio of inertial forces to viscous forces, is often used in engineering to predict whether flow conditions will be turbulent, a high Reynolds number, or laminar.

In fluid dynamics, a turbulent flow is a swirling fluid with faster or slower areas and higher or lower pressure.

But there may be a way to cut drag force by almost 30 %, according to computer simulations of turbulent ocean - water flows reported in the 19 May issue of Science by mechanical engineer Yiqing Du of the Massachusetts Institute of Technology and applied mathematician George Karniadakis of Brown University.

«The boundary layer can be laminar, which is smoothly flowing, or turbulent, in which case you have eddies,» Bush says.

More than 130 years ago, British physicist and engineer Osborne Reynolds described fluid flowing at low speeds as «laminar,» meaning it flows smoothly in a single direction, and fluid flowing at high speeds as «turbulent,» meaning it experiences chaotic changes in pressure and energy.

In pipes, both laminar and turbulent flows can in principle exist and be stable, but already a small disturbance can make a laminar flow turbulenIn pipes, both laminar and turbulent flows can in principle exist and be stable, but already a small disturbance can make a laminar flow turbulenin principle exist and be stable, but already a small disturbance can make a laminar flow turbulent.

Most flows that we can observe in nature and in engineering are turbulent, from the smoke of an extinguished candle to the flow of blood in the left ventricle of our heart.

Astronomers have been able to forecast trends in the number of sunspots since the 1800s, but predicting individual spots requires satellites that can probe the turbulent plasma flows deep beneath the sun's surface.

The opposite of this is a turbulent flow which is characterized by vortices and chaotic changes in pressure and velocity within the fluid.

In their proof of principle, Björn Hof and his group have now shown that this assumption was wrong, and that a turbulent flow can indeed be transformed to a laminar one.

«In contrast the Brazuca, with its deeper grooves, hits that turbulent air flow at a lower speed with the result that the ball is much more predictable.

So does water, in some cases: Around a small model of a rock - and - concrete dike, for instance, water may display a so - called laminar flow pattern, whereas in the real world it displays more chaotic turbulent flows.

Those in the tropical genus Rhagovelia, however, have also figured out how to walk across fast - flowing streams and turbulent whitewater.

According to the researchers, small VAWTs possess the ability to effectively operate in the presence of high turbulent flow, which makes them ideal energy harvesting devices in urban and suburban environments.

«By sensing gusts and disturbances in air flow through their feathers, birds are able to fly gracefully rather than bouncing around in turbulent air,» he said.

The Southampton research team, led by Richard Sandberg, Professor of Fluid Dynamics and Aeroacoustics, and including Dr Andrew Wheeler and Professor Neil Sandham, has identified that Direct Numerical Simulations (DNS), a model - free approach based on first principles (no assumptions or modelling are used) can help to develop an improved understanding of the role of turbulent phenomena in the flow - field and determine the validity of current turbulence modelling.

Imagine the most extreme example, a human being who does not possess the power to forget, who is damned to see becoming everywhere; such a human being would no longer believe in his own being, would no longer believe in himself, would see everything flow apart in turbulent particles, and would lose himself in this stream of becoming; like the true student of Heraclitus, in the end he would hardly even dare to lift a finger.

Its flow is turbulent, containing eddies and moving at different speeds in different directions.

Faster flow is more turbulent, and in this turbulence more heat is mixed into AABW from shallower, warmer ocean layers — thus warming the abyssal waters on their way to the Equator, affecting global climate change.

From blood flow to weather patterns, the equations prove invaluable in modeling turbulent environments; even so, physically meaningful solutions are nearly impossible to come by.

In the same way, the turbulent flow can evolve in various different ways after passing by an ECS,» Grigoriev saiIn the same way, the turbulent flow can evolve in various different ways after passing by an ECS,» Grigoriev saiin various different ways after passing by an ECS,» Grigoriev said.

We will measure how fast the streams flow, how turbulent they are, and how they respond to changes in winds over the Southern Ocean.

And, in a novel experiment, they verified their predictions physically in a two - dimensional turbulent flow produced in a lab.

To the researchers» surprise, their calculations showed that turbulent flows of a class of superfluids on a flat surface behave not like those of ordinary fluids in 2 - D, but more like 3 - D fluids, which morph from relatively uniform, large structures to smaller and smaller structures.

In the dolphin's case, a thin layer of water flows along the body until it becomes chaotic, or turbulent.

The team directly measured terms in turbulence model equations, providing insights into the global nature of the mixing (e.g., faster mixing near the edges of the turbulent fluid layer when compared with the core) and identifying the dominant mechanisms governing the flow evolution.

The researchers took high - resolution mean and fluctuating velocity and density field measurements in an RM flow, which was shocked and reshocked, to understand production and dissipation in a two - fluid, developing turbulent flow field.

«This newly discovered analogy has the potential to be a significant step forward in our understanding of turbulent flows in free - surface vortices and to provide insights into diverse areas of study ranging from civil engineering hydraulic structures to weather systems in the atmosphere and even extending to the details of how galaxies rotate around the black holes at their centres,» Dr Richard Sherlock, a lecturer in Physics at IT Sligo, said.

Editor Claudine Bouché's turbulent, free flowing cuts from early on in the film subtly slow in pace and becomes more pensive and methodical, capturing the tone of the characters by holding on to the shots a few seconds longer.

This is the world's first draught - stop system that enables different comfort levels to be selected for two occupants, as the driver and passenger can individually pivot the units to the centre of the vehicle in a flash, thus taming turbulent air flow from the rear.

There's also Airguide, a new draught - stop system consisting of pivoting transparent plastic layers attached to the reverse of the roll - over bars — the driver or passenger can swing them to the centre of the vehicle in a flash to tame turbulent air flow.

For an investor looking to invest some funds in a foreign country stock this table might be a good place to start.Since this table lists the highly liquid stocks, investing in them reduces the risk of liquidity problem especially in times of turbulent markets.Another advantage of picking one of these stocks is «you are going with the flow of many investors» since there is heavy interest in these stocks.While this can be negatively implied as a herd mentality, still it makes sense to put some money in a highly traded stock first before jumping into other stocks of a country.For example — it is a good idea to pick up some National bank of Greece — NBG first before going for Diana Shipping — DSX or other Greek ADRs.

A heart murmur is caused by turbulent blood flow in the cardiac chambers or great vessels.

This is often also associated with some degree of mitral regurgitation, and these causes of turbulent blood flow account for the systolic murmur audible in some cats with HCM.

video 5 — modified left parasternal short axis view of heart base with color Doppler of the pulmonary artery showing continuous flow with small turbulent jet in opposite direction.

A heart murmur is an abnormal sound heard on physical exam with a stethoscope, which develops when blood flow in the heart or great vessels is turbulent.

In addition, focal syrinx cavities can form anywhere along the length of the spinal cord if there is something near the syrinx causing turbulent CSF flow.

In the reef environment, a turbulent flow must replace the usual laminar flow.

Shibata's pictures revel in water's dynamic range, from turbulent to gentle, as it negotiates deftly engineered landscapes designed to guide it's flow.

It is this positive feedback on the pressure which leads to the turbulent flow (chaos) in the tube.

Instead, it is a dynamically active, essentially turbulent fluid, in which large - scale tracer patterns arise from active turbulence and do not necessarily imply domination of the physics and climate system by large - scale flow fields....»

The chaos (turbulent flow) in a tube is due to the forcing of (pressure applied to) the liquid through the tube.

O'Gorman, P. A., and T. Schneider, 2006: Stochastic models for the kinematics of moisture flux and condensation in homogeneous turbulent flows.

So while the general idea of turbulence in air is correct, your calculation underestimates the tendency for turbulent flow.

Using the Reynolds number above in your calculation, you can see that turbulent flow in air would happen (at a height of 1m above ground) at a velocity of 0.0315 m / s.