Sentences with phrase «shear flow»

They presented the intrinsic molecular characteristics of the slip phenomena by using atomistic nonequilibrium molecular dynamics simulations of polyethylene melts under shear flow.

In contrast to the behavior in pure elongational flow, the average polymer extension in shear flow does not display a sharp coil - stretch transition.

The conformational dynamics of individual, flexible polymers in steady shear flow were directly observed by the use of video fluorescence microscopy.

The simulation reveals that the bifurcation results from the synergistic relationship between the Reynolds stress - generated sheared flow and the non turbulent - generated sheared flow, which is technically known as the «X-point orbit loss - driven» and «neoclassical» flow.

One school proposes that the transformation comes from a turbulence - generated sheared flow of edge plasma generated by a process called «Reynolds stress.»

Although everyday experience shows that laminar motion in simple shear flows as in pipes or channels gives way to turbulence as the flow speed increases, the exact nature of this transition has remained a riddle since its first study in the 19th century.

, Millet, C. and Vanneste, J. (2015), Inertia - gravity waves in inertially stable and unstable shear flows.

Lott, F., Millet, C. and Vanneste, J. (2015), Inertia - gravity waves in inertially stable and unstable shear flows.

Not exact matches

With Steam Infusion allowing more control over the steam flow rate, we change the operating characteristics of the Vaction ™ Unit from a gentle introduction of steam to a disruptive high shearing process environment.

By allowing for a flow of movement and making room for both large and small hands, the right pair of hair shears will keep shoulders, wrists, and fingers from getting sore too quickly.

«The modeling we're doing of transient blood flows is thought to be the first successful effort to represent more than just the steady shear behavior of human blood,» Horner said.

And shear is important in generating «eddies» — cyclonic or anticyclonic swirls of energy — within the overall wind flow.

At the bottom of the device are shear valves or rams designed to cut through the drill pipe and block off any oil flowing inside the pipe or through the surrounding well casing.

The team found that swimming bacteria cluster in the «high shear zones» in a flow — the regions where the speed of the fluid changes most abruptly.

Previous research has shown that water flow exerts shear stress to remove the biofilm.

The concept of «jamming by shear» was introduced to explain how frictional fluid materials transition from a flowing to rigid state.

These measurements, done on a state - of - the - art rheometer, or flow - measurement device, at Georgetown's Institute for Soft Matter Synthesis and Metrology, unmasked «a previously hidden transition from hydrodynamics - dominated to friction - dominated interactions as the shear thickening becomes more pronounced,» Royer says.

«These results now motivate new microscopic approaches to control shear thickening in industrial applications, by either minimizing thickening when steady flow is needed or controlling thickening for use as in flexible body armor applications.»

High content evaluation of shear dependent platelet function in a microfluidic flow assay.

With the flowing shear fabric and a few added tassels, you can dress up your jeans, skirts and dresses.

When you're a thunder god, we suppose you can demand that your flowing locks be shorn off if you're sick of the wig.

Pulmonary arterial constriction causes increased flow velocity, especially with exertion, and resultant shear stresses further damage the endothelium.

One type of forced convection is when the cold air from the poles flows under the warmer subtropical air, which results in wind shear.

The atmospheric flow will also have an influence, as strong vertical wind shear can inhibit cyclogenesis (spawning of cyclones).

Eddies can grow by extracting kinetic energy from a steady - state flow pattern, if there is an elongated horizontal maximum or minimum in potential vorticity; however, the shear can tilt those eddies in such a way that the eddies give back their kinetic energy.

If we're considering the risk of hurricane damages, and not just overall basin activity, then the effect of increased vertical wind shear would seem to be (at least) twofold — it not only reduces potential intensity, but it also influences the steering of hurricanes (since hurricanes are basically steered by the background flow plus a beta drift).

Conversely, due to well - researched upper - atmospheric flow (e.g. vertical shear) configurations favorable to Atlantic hurricane development and intensification, La Nina falls tend to favor very active seasons in the Atlantic (El Nino years are the converse, with must less activity, as forecast by Gray and NOAA for 2009).

It is therefore highly suggestive that their origins are also due to barotropic instability, indicating that the flow at the cloud level has more shear than the cloud motion measurements might suggest.

And since the factors involved in churning up flows of air are the subject of serious academic debate, they had a lot of possibilities to consider and at least 20 different units of measurement to factor into their models — technicalities like the magnitude of vertical shear of horizontal wind, flow deformation and simple wind speed, and highly specialised meteorological considerations such as the negative Richardson number, and the Brown energy dissipation rate.

The ice sheets are moving, naturally and at different speeds, causing the ice to shear or flow, and the assumption has always been that the ice is flowing over hard and impermeable rock.

Warm ground (strong heating of the ground) and non-turbulent vertical flow due to convective shear forces slow enough to allow approximately adiabatic expansion and compression to occur in the overturning convective air parcels favors the DALR.

This flow exerts a shearing stress on the ocean surface, which results in the deflection of the upper layer of water above the thermocline to the right in the Northern Hemisphere and to the left in the Southern Hemisphere.

Reynolds stresses for shear - driven flows.

IR and UV Reynolds stress spectra for shear - driven flows.

Complete system of five orthogonal tensors for shear - driven flows.

As it is, a Hadley cell that conserves angular momentum develops large wind shears and the flow becomes baroclinically unstable (it can be shown through the so - called thermal wind equation that the vertical gradient of the horizontal wind velocity is proportional to the horizontal temperature gradient).