Chapter 1 Fluids Mechanics & Fluids Properties
... There will be local boiling and a cloud of vapor bubbles will form. This phenomenon is known as cavitations, and can cause serious problems, since the flow of fluid can sweep this cloud of bubbles on into an area of higher pressure where the bubbles will collapse ...
... There will be local boiling and a cloud of vapor bubbles will form. This phenomenon is known as cavitations, and can cause serious problems, since the flow of fluid can sweep this cloud of bubbles on into an area of higher pressure where the bubbles will collapse ...
Introduction to fluid dynamics and simulations in COMSOL
... Materials (solids, liquids and gases) are composed of molecules separated by empty space. But the continuum model as a mathematical concept assumes that material exists as a continuous entity. It means that the matter in the body is continuously distributed and fills the entire region of space it oc ...
... Materials (solids, liquids and gases) are composed of molecules separated by empty space. But the continuum model as a mathematical concept assumes that material exists as a continuous entity. It means that the matter in the body is continuously distributed and fills the entire region of space it oc ...
Document
... explain why an air bubble grows in size as it moves from bottom to top in water? All the fluids have tendency to move from higher pressure to the lower pressure side. As the pressure in water is more at the bottom then at the top therefore it rises upwards in direction of decreasing pressure. Accord ...
... explain why an air bubble grows in size as it moves from bottom to top in water? All the fluids have tendency to move from higher pressure to the lower pressure side. As the pressure in water is more at the bottom then at the top therefore it rises upwards in direction of decreasing pressure. Accord ...
E r o s
... A fluid is therefore sheared (displaced laterally) when it flows past a solid surface and the opposition set up by the fluid is called its viscosity. ...
... A fluid is therefore sheared (displaced laterally) when it flows past a solid surface and the opposition set up by the fluid is called its viscosity. ...
Solar Closed-Cycle MHD Generator
... across electrodes, it is generated via induction. Ion transfer and direct current is not the goal but simply a varying magnetic field and perpendicular flow of a conductor across that field. This will be an AC MHD Generator not DC. Induction and local oscillation on the permanent magnet stack occur ...
... across electrodes, it is generated via induction. Ion transfer and direct current is not the goal but simply a varying magnetic field and perpendicular flow of a conductor across that field. This will be an AC MHD Generator not DC. Induction and local oscillation on the permanent magnet stack occur ...
Vertical structure of the atmosphere
... The atmosphere is very close to hydrostatic balance most of the time, except at isolated locations when the vertical profile becomes statically unstable. In that situation, convection will happen to restore stability. This takes place on a very short time scale (~ a few hours), therefore after some ...
... The atmosphere is very close to hydrostatic balance most of the time, except at isolated locations when the vertical profile becomes statically unstable. In that situation, convection will happen to restore stability. This takes place on a very short time scale (~ a few hours), therefore after some ...
Chapter 5 Pressure Variation in Flowing Fluids
... Bernoulli equation across streamlines. However, if the flow is “rotational” (fluid particles “spin”), use of the Bernoulli equation is restricted to flow along a streamline. 4. Other Restrictions Another restriction on the Bernoulli equation is that the flow is inviscid. The Bernoulli equation is ac ...
... Bernoulli equation across streamlines. However, if the flow is “rotational” (fluid particles “spin”), use of the Bernoulli equation is restricted to flow along a streamline. 4. Other Restrictions Another restriction on the Bernoulli equation is that the flow is inviscid. The Bernoulli equation is ac ...
A Tutorial on Pipe Flow Equations
... The critical zone presents another more serious numeric problem. First it must be stated that normal pipes through which any significant amount of fluid is flowing and which have any measurable headlosses will have Nre much greater than 3250. Still, very low flow pipes do occur in both liquid and ga ...
... The critical zone presents another more serious numeric problem. First it must be stated that normal pipes through which any significant amount of fluid is flowing and which have any measurable headlosses will have Nre much greater than 3250. Still, very low flow pipes do occur in both liquid and ga ...
Experimental observation of induced-charge electro-osmosis
... To visualize the flow, small (500 nm) fluorescent seed particles (G500, Duke Scientific, CA) with peak excitation and emission at 468 and 508 nm, respectively, were loaded into the microchannel at a volume loading fraction of 0.01%. The neutrally buoyant polystyrene spheres were suspended in 1 mM KC ...
... To visualize the flow, small (500 nm) fluorescent seed particles (G500, Duke Scientific, CA) with peak excitation and emission at 468 and 508 nm, respectively, were loaded into the microchannel at a volume loading fraction of 0.01%. The neutrally buoyant polystyrene spheres were suspended in 1 mM KC ...
Kinds of Forces
... two touching solid surfaces that is parallel to the surface. It acts to oppose the relative motion of the surfaces. That is, it acts as if the two surfaces stick together a bit. Normal forces adjust themselves in response to external forces. So does friction – up to a point. ...
... two touching solid surfaces that is parallel to the surface. It acts to oppose the relative motion of the surfaces. That is, it acts as if the two surfaces stick together a bit. Normal forces adjust themselves in response to external forces. So does friction – up to a point. ...
Turbulence
In fluid dynamics, turbulence or turbulent flow is a flow regime characterized by chaotic property changes. This includes low momentum diffusion, high momentum convection, and rapid variation of pressure and flow velocity in space and time.Flow in which the kinetic energy dies out due to the action of fluid molecular viscosity is called laminar flow. While there is no theorem relating the non-dimensional Reynolds number (Re) to turbulence, flows at Reynolds numbers larger than 5000 are typically (but not necessarily) turbulent, while those at low Reynolds numbers usually remain laminar. In Poiseuille flow, for example, turbulence can first be sustained if the Reynolds number is larger than a critical value of about 2040; moreover, the turbulence is generally interspersed with laminar flow until a larger Reynolds number of about 4000.In turbulent flow, unsteady vortices appear on many scales and interact with each other. Drag due to boundary layer skin friction increases. The structure and location of boundary layer separation often changes, sometimes resulting in a reduction of overall drag. Although laminar-turbulent transition is not governed by Reynolds number, the same transition occurs if the size of the object is gradually increased, or the viscosity of the fluid is decreased, or if the density of the fluid is increased. Nobel Laureate Richard Feynman described turbulence as ""the most important unsolved problem of classical physics.""