Sentences with phrase «in turbulent fluids»

Another technique, time microscopy, also exists, and was used by the laboratory Physique des lasers, atomes et molécules (CNRS / Université de Lille) to study instabilities similar to those observed in turbulent fluids.

Not exact matches

Nick Clegg is examine the «fluid and unpredictable state» of the UK's turbulent political scene in...

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.

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

Wouter Bos at the École Centrale de Lyon in France and his colleagues have now tracked a turbulent fluid's motion by picking one point and following it as the fluid tosses it about.

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.

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

In 1998, his previous fundamental work in turbulent combustion at the University of Colorado at Boulder led Dr. Mahalingam to do NSF - sponsored field research in Alaska comparing the properties of prescribed permafrost burns to help develop models describing the chemistry and fluid dynamics of fireIn 1998, his previous fundamental work in turbulent combustion at the University of Colorado at Boulder led Dr. Mahalingam to do NSF - sponsored field research in Alaska comparing the properties of prescribed permafrost burns to help develop models describing the chemistry and fluid dynamics of firein turbulent combustion at the University of Colorado at Boulder led Dr. Mahalingam to do NSF - sponsored field research in Alaska comparing the properties of prescribed permafrost burns to help develop models describing the chemistry and fluid dynamics of firein Alaska comparing the properties of prescribed permafrost burns to help develop models describing the chemistry and fluid dynamics of fires.

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.

«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.

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.

Using further 3 - D dynamo simulations, which model the generation of magnetic field by turbulent fluid motions, Driscoll looked more carefully at the expected changes in the magnetic field over this period.

In research featured on the cover of Journal of Fluid Mechanics, an interdisciplinary Los Alamos team took a series of first - time measurements of turbulent mixing, providing new insights for turbulence modelers.

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.

Violence issues center around dark, blood - like fluids, bodies submersed in water and turbulent flashbacks.

That is to say, the transport of energy is (over some range of wavelengths) from shorter to longer wavelengths, the opposite of what is typically seen in a fluid, where energy is dissipated by the small - scale turbulent structures.

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....»

To improve the heat transfer between fluid boundaries you can increase the turbulent flow, which increases both the molecular contact rate and the rate of diffusion in the fluid.

The current thinking in fluid dynamics, for which there is ample theoretical and computational evidence is that the Navier - Stokes equation if solved accurately are very accurate for a wide range of flows including turbulent flows.

Now, Leif, the cause of the turbulent field or natural convection is the suitable flow of energy from the solar core against gravity towards the surface, and the laws of fluid dynamics under conditions in which the convective cell has rotational and orbital components of angular momentum as determined by the path of the sun the planets force it to follow.

We demonstrate the energy with a very simple model in which two fluid elements of equal mass exchange positions, calling to mind a turbulent field or natural convection.

Yet making progress is challenging, in part because their dynamics involve three - dimensional, turbulent fluid motions on the scale of a few meters, the nonlinear interaction of turbulence with the formation of cloud droplets, and the interaction of these cloud droplets with radiation (e.g. Wood (2012)-RRB-.