Numerical Modeling of Lava Flow Behavior on Earth and Mars
... parameters are well known for any particular flow, and therefore lava flow modeling must make simplifying assumptions, such as utilizing an idealized rheology. Many studies have successfully used simplified models to characterize flow evolution [2], especially for cases of purely molten lava without ...
... parameters are well known for any particular flow, and therefore lava flow modeling must make simplifying assumptions, such as utilizing an idealized rheology. Many studies have successfully used simplified models to characterize flow evolution [2], especially for cases of purely molten lava without ...
Magnetic vs Mechanical Flow Meters
... having a conductive liquid flow through a lined flow tube and of the flow passing through a magnetic field generated as part of the flow tube design causing a voltage to be created. This voltage increases or decreases based on velocity. So, as long as the material meets the minimum conductivity leve ...
... having a conductive liquid flow through a lined flow tube and of the flow passing through a magnetic field generated as part of the flow tube design causing a voltage to be created. This voltage increases or decreases based on velocity. So, as long as the material meets the minimum conductivity leve ...
Fluid Mechanics Concepts
... less by the magnitude of the buoyant force. In our particular example, the buoyant force, B, on the object is about half the magnitude of the weight of the object, W. Can you estimate the specific gravity of the substance ...
... less by the magnitude of the buoyant force. In our particular example, the buoyant force, B, on the object is about half the magnitude of the weight of the object, W. Can you estimate the specific gravity of the substance ...
fluid - GEOCITIES.ws
... Bernoulli’s equation suggests that for fluid flow where the potential energy change hg is very small or zero, as in a horizontal pipe, the pressure falls when the velocity rises The velocity increases at a constriction and this creates a pressure drop. The following devices make use of this effect ...
... Bernoulli’s equation suggests that for fluid flow where the potential energy change hg is very small or zero, as in a horizontal pipe, the pressure falls when the velocity rises The velocity increases at a constriction and this creates a pressure drop. The following devices make use of this effect ...
The Physics of Flow
... much less dense than nitrogen (which makes up 79% of air), therefore making heliox much less dense than air. In patients with upper airway obstruction, flow is through an orifice and hence more likely to be turbulent and dependent on the density of the gas passing through it. Therefore for a given p ...
... much less dense than nitrogen (which makes up 79% of air), therefore making heliox much less dense than air. In patients with upper airway obstruction, flow is through an orifice and hence more likely to be turbulent and dependent on the density of the gas passing through it. Therefore for a given p ...
In this paper, we studied the effect of heat transfer on an oscillatory
... and t 0 . It is found that, the temperature increases with increasing radiation parameter N . The influence of Peclet number Pe on the temperature for 1 , Pe 0.71 and t 0 is depicted in Fig. 12. It is observed that the temperature decreases with an increase in Peclet number Pe . Fig. ...
... and t 0 . It is found that, the temperature increases with increasing radiation parameter N . The influence of Peclet number Pe on the temperature for 1 , Pe 0.71 and t 0 is depicted in Fig. 12. It is observed that the temperature decreases with an increase in Peclet number Pe . Fig. ...
Three-dimensional traveling-wave solutions in
... In order to understand transition mechanisms from laminar state to turbulence for the simplest form of shear motion, plane Couette flow has been studied a great deal both theoretically @1–3# and experimentally @4–9# in the last few years. In experiments, turbulent spots are triggered by injecting a ...
... In order to understand transition mechanisms from laminar state to turbulence for the simplest form of shear motion, plane Couette flow has been studied a great deal both theoretically @1–3# and experimentally @4–9# in the last few years. In experiments, turbulent spots are triggered by injecting a ...
Effective slip on textured superhydrophobic surfaces
... droplet is Ca= Ur / = 10−3. The small value of the capillary number indicates that the shape of the droplet is not significantly affected by the motion.9 The parameters of our experiment are somewhat consistent with the BoⰆ 1 共i.e., surface tension effects dominate gravity effects兲, CaⰆ 1 assump ...
... droplet is Ca= Ur / = 10−3. The small value of the capillary number indicates that the shape of the droplet is not significantly affected by the motion.9 The parameters of our experiment are somewhat consistent with the BoⰆ 1 共i.e., surface tension effects dominate gravity effects兲, CaⰆ 1 assump ...
Flow Measurement
... smoothly in layers, with the fastest moving layers toward the center and the slowest moving layers on the outer edges of the stream. (parabolic shape) Turbulent flow occurs when the flow velocity is high and the particles no longer flow smoothly in layers and turbulent or rolling effect occurs. (the ...
... smoothly in layers, with the fastest moving layers toward the center and the slowest moving layers on the outer edges of the stream. (parabolic shape) Turbulent flow occurs when the flow velocity is high and the particles no longer flow smoothly in layers and turbulent or rolling effect occurs. (the ...
Boundary layer
In physics and fluid mechanics, a boundary layer is the layer of fluid in the immediate vicinity of a bounding surface where the effects of viscosity are significant. In the Earth's atmosphere, the atmospheric boundary layer is the air layer near the ground affected by diurnal heat, moisture or momentum transfer to or from the surface. On an aircraft wing the boundary layer is the part of the flow close to the wing, where viscous forces distort the surrounding non-viscous flow. See Reynolds number.Laminar boundary layers can be loosely classified according to their structure and the circumstances under which they are created. The thin shear layer which develops on an oscillating body is an example of a Stokes boundary layer, while the Blasius boundary layer refers to the well-known similarity solution near an attached flat plate held in an oncoming unidirectional flow. When a fluid rotates and viscous forces are balanced by the Coriolis effect (rather than convective inertia), an Ekman layer forms. In the theory of heat transfer, a thermal boundary layer occurs. A surface can have multiple types of boundary layer simultaneously.The viscous nature of airflow reduces the local velocities on a surface and is responsible for skin friction. The layer of air over the wing's surface that is slowed down or stopped by viscosity, is the boundary layer. There are two different types of boundary layer flow: laminar and turbulent.Laminar Boundary Layer FlowThe laminar boundary is a very smooth flow, while the turbulent boundary layer contains swirls or ""eddies."" The laminar flow creates less skin friction drag than the turbulent flow, but is less stable. Boundary layer flow over a wing surface begins as a smooth laminar flow. As the flow continues back from the leading edge, the laminar boundary layer increases in thickness.Turbulent Boundary Layer FlowAt some distance back from the leading edge, the smooth laminar flow breaks down and transitions to a turbulent flow. From a drag standpoint, it is advisable to have the transition from laminar to turbulent flow as far aft on the wing as possible, or have a large amount of the wing surface within the laminar portion of the boundary layer. The low energy laminar flow, however, tends to break down more suddenly than the turbulent layer.