adverse pressure gradient


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adverse pressure gradient

n
(Aeronautics) aerodynamics an increase of pressure in the direction of flow
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TRAS presented nonuniform pressure distribution, adverse pressure gradient across stenosis throat, flow vortex, and a separation zone at downstream stenosis.
Also flow separates at the entrance of valve neck because of adverse Pressure gradient increases with increase in valve Neck because the change of valve shape.
Recent wind tunnel measurements [1, 2] have determined that this also holds for developing boundary layers with a modestly favorable or adverse pressure gradient.
5D: in the upper layer, the plots in Figure 11 show the contours of instantaneous vertical-averaged pressure gradient distribution of the two tandem piles and the isolated pile in the upper layer, where Zone A and Zone B denote the favorable pressure gradient area and the adverse pressure gradient area (all the instantaneous contours shown in this paper are adopted when [mathematical expression not reproducible] reaches its maximum for each simulation case [4]).
Especially near the die lip, where the no-slip condition dictates the fluid to stop, the shear rate locally increases significantly, when the wet film thickness is small enough to induce a strong adverse pressure gradient.
Turbulent boundary layers are more stable than laminar layers under conditions of an adverse pressure gradient, and consequently the turbulent flow remains attached to the rear half of the ball considerably longer, resulting in a significantly narrower wake.
As the top roll's speed rises, the meniscus moves toward the gap, and an adverse pressure gradient is formed.
The turbulent boundary layer of an aircraft wing first undergoes favorable pressure gradient and then adverse pressure gradient.
p] distributions such that the overall adverse pressure gradient on the upper surface is decreased.
Due to the injecting direction and the normal injection are somewhat similar to those of adverse pressure gradient.
In the GWU team's most recent investigation, they found that asymmetric flow develops when there is an adverse pressure gradient.
Morihara and Cheng also reported the existence of a delta-shaped adverse pressure gradient zone that extends into the entrance region at a small Reynolds number, and it is practically nonexistent at Re = 2000.