boundary layer


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Related to boundary layer: Atmospheric boundary layer

boundary layer

In fluidics, a narrow region next to a fixed boundary or surface where the fluid velocity rapidly changes from zero to some finite value.

boundary layer

microscopic layer of fluid (liquid or gas) next to the surface of a body or object moving relative to it, important in considering the drag force upon the object. laminar boundary layer layer which is next to the surface of an object, not mixing with the flow further away from the surface, and so can be considered to be a discrete layer in a plane parallel to the main flow. turbulent boundary layer layer which is next to the surface of an object, but in this case mixing with the flow further away from it. An example of a boundary layer change is that due to a dimpled golf ball in flight: the dimples make the boundary layer turbulent, which reduces drag caused by the pressure being lower behind the ball, so less energy is lost to the flow.
References in periodicals archive ?
In order to measure the boundary layer thickness behind the tangential blowers in the empty tunnel, a rake of total pressure probes was mounted on the wind tunnel traversing gear and positioned such that the first probe was located 2 mm above the tunnel floor.
3, b), which encompasses all angles inclination, and as discussed previously, we assume that due to the inclination of the plate, the boundary layer behavior permit to obtain two main flow (regions I and II), one frame at each leading edge.
numerical stability if slope angles increase), the most fundamental physical problem is the boundary layer (turbulence) parameterization, which most generally is defined based on knowledge from flat and homogeneous conditions.
Cheryl Hendrickson is a consulting biogeographer who lives in Alberta's boundary layer of foothills.
3 shows the temperature distribution measured experimentally in the annulus space of the heat exchanger along the thermal boundary layer for different Reynolds number.
Mohammadi, "A computational approach for solution of boundary layer equations for the free convection along a vertical plate," Journal of Computational Methods in Sciences and Engineering, vol.
It is noticed that velocity increases with increase in suction, the result corresponds to the physical phenomenon and because of increase in the speed the boundary layer decreases.
In addition, Figures 8 and 9 show that for Cu/water the dynamic viscosity increases more and leads to a thinner boundary layer than other particles.
As heating goes on during the morning, the thermals get larger and more organized and the boundary layer deepens as shown in the drawing above
This mesh distribution led to numerical errors occurring when the boundary layer cells were smaller than 0.
The boundary layer refers to the layer of air closest to the Earth, in which gases and particles mix effectively.
Evidence for the asteroid impact comes from sediments in the K-Pg boundary layer, but the details of the event, including what precisely caused the mass extinction, are still being debated.

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