The added mass of a spherical projectile

... is the choice of projectile. We find that beach balls are inexpensive spheres well suited to these experiments. The density of these plastic inflatables is small enough that the buoyant force and the added mass have a large effect on their acceleration while it is also the case that the drag force d ...

... is the choice of projectile. We find that beach balls are inexpensive spheres well suited to these experiments. The density of these plastic inflatables is small enough that the buoyant force and the added mass have a large effect on their acceleration while it is also the case that the drag force d ...

Experiments on cylinder wake stabilization

... Lorentz force is mainly directed parallel to the cylinder surface. One could imagine two plates as shown in Fig. 1 each wrapped around a half cylinder, so that the Lorentz forces on both sides have the same direction. Depending on the polarity of the applied electric field the force sketched by the ...

... Lorentz force is mainly directed parallel to the cylinder surface. One could imagine two plates as shown in Fig. 1 each wrapped around a half cylinder, so that the Lorentz forces on both sides have the same direction. Depending on the polarity of the applied electric field the force sketched by the ...

Forces on Kelp

... Denny, M.W., Gaylord, B.P., and Cowen, E.A., 1997, Flow and Flexibility: II. The roles of size and shape in determining wave forces on the bull kelp Nereocystis luetkeana: Journal of Experimental Biology, v. 200, p. 3165–3183. Friedland, M.T., and Denny, M.W., 1995, Surviving hydrodynamic forces in ...

... Denny, M.W., Gaylord, B.P., and Cowen, E.A., 1997, Flow and Flexibility: II. The roles of size and shape in determining wave forces on the bull kelp Nereocystis luetkeana: Journal of Experimental Biology, v. 200, p. 3165–3183. Friedland, M.T., and Denny, M.W., 1995, Surviving hydrodynamic forces in ...

Momentum (Newton`s 2nd Law of Motion)

... there is no flow crossing the top and bottom control surface. The control surface is taken far enough from the body in all directions, so that the pressure on it may be assumed uniform, equal to ambient atmospheric pressure: ...

... there is no flow crossing the top and bottom control surface. The control surface is taken far enough from the body in all directions, so that the pressure on it may be assumed uniform, equal to ambient atmospheric pressure: ...

Lecture 14c - TTU Physics

... CONTINUITY FOR FLUIDS – The product of the area and the fluid speed at all points along a pipe is constant for an incompressible fluid ...

... CONTINUITY FOR FLUIDS – The product of the area and the fluid speed at all points along a pipe is constant for an incompressible fluid ...

Preparation of Papers in Two-Column Format

... and the cinematic viscosity (ν), represented by ratio between the dynamic viscosity and the density (µ / ρ) − can be used as a primary parameter to classify the flow around a sphere. The flow regimes for a single sphere in a infinitum medium, can be described, in accord to ref. [3] as follows: For R ...

... and the cinematic viscosity (ν), represented by ratio between the dynamic viscosity and the density (µ / ρ) − can be used as a primary parameter to classify the flow around a sphere. The flow regimes for a single sphere in a infinitum medium, can be described, in accord to ref. [3] as follows: For R ...

Fluid Mechanics Concepts

... When an object floats in a given fluid, the buoyant force and the weight of the object are equal. To float, the average density of an object must be less than that of the fluid, because, with only a portion of its volume below the surface, the object displaces a small volume of fluid that weighs as ...

... When an object floats in a given fluid, the buoyant force and the weight of the object are equal. To float, the average density of an object must be less than that of the fluid, because, with only a portion of its volume below the surface, the object displaces a small volume of fluid that weighs as ...

Chapter 14

... to flow; viscosity is the fluid analog of friction between solids. An object moving through a nonviscous fluid would experience no viscous drag force—that is, no resistive force due to viscosity; it could move at constant speed through the fluid. ...

... to flow; viscosity is the fluid analog of friction between solids. An object moving through a nonviscous fluid would experience no viscous drag force—that is, no resistive force due to viscosity; it could move at constant speed through the fluid. ...

Research on Aerodynamic Drag Reduction by Vortex Generators

... However, as the passenger car must have enough capacity to accommodate passengers and baggage in addition to minimum necessary space for its engine and other components, it is extremely difficult to realize an aerodynamically ideal body shape. The car is, therefore, obliged to have a body shape that ...

... However, as the passenger car must have enough capacity to accommodate passengers and baggage in addition to minimum necessary space for its engine and other components, it is extremely difficult to realize an aerodynamically ideal body shape. The car is, therefore, obliged to have a body shape that ...

Report 3082

... the capsule into 4 sections, accelerating after release, terminal velocity in stratosphere, terminal velocity in troposphere and then parachuting. Due to the much higher drag coefficient of the capsule, we assumed that the deceleration would be much faster between the layers and so would be negligib ...

... the capsule into 4 sections, accelerating after release, terminal velocity in stratosphere, terminal velocity in troposphere and then parachuting. Due to the much higher drag coefficient of the capsule, we assumed that the deceleration would be much faster between the layers and so would be negligib ...

# Drag (physics)

In fluid dynamics, drag (sometimes called air resistance, a type of friction, or fluid resistance, another type of friction or fluid friction) refers to forces acting opposite to the relative motion of any object moving with respect to a surrounding fluid. This can exist between two fluid layers (or surfaces) or a fluid and a solid surface. Unlike other resistive forces, such as dry friction, which are nearly independent of velocity, drag forces depend on velocity.Drag force is proportional to the velocity for a laminar flow and the squared velocity for a turbulent flow. Even though the ultimate cause of a drag is viscous friction, the turbulent drag is independent of viscosity.Drag forces always decrease fluid velocity relative to the solid object in the fluid's path.