Exam2 - Purdue Engineering
... 15) The velocity potential of a uniform flow in the y direction with speed 2 and a source of strength 0.1π located at x=y=0 is: a. 2 x + .05 ln(r) b. 2 y + .05 ln(r) c. 2 x + .05 θ d. 2 y - .05 θ e. 2 y - .05 ln(r) (where r and θ are polar coordinates centered at x=y=0) 16) Water flows through a ci ...
... 15) The velocity potential of a uniform flow in the y direction with speed 2 and a source of strength 0.1π located at x=y=0 is: a. 2 x + .05 ln(r) b. 2 y + .05 ln(r) c. 2 x + .05 θ d. 2 y - .05 θ e. 2 y - .05 ln(r) (where r and θ are polar coordinates centered at x=y=0) 16) Water flows through a ci ...
MOTION OF BODIES IN FLUIDS
... The laws governing the motion of an object, as given in the previous chapters, apply only when all the forces acting on the object are taken into account. In the real world all objects move through fluids so we must include the forces exerted by the extremely large number of fluid molecules. In some ...
... The laws governing the motion of an object, as given in the previous chapters, apply only when all the forces acting on the object are taken into account. In the real world all objects move through fluids so we must include the forces exerted by the extremely large number of fluid molecules. In some ...
Vortex Shedding
... experiences a net pressure force opposite to its direction of motion. • At some point (point C), the momentum of the fluid in the boundary layer is insufficient to carry the element further into the region of increasing pressure. • The fluid layers adjacent to the solid surface are brought to rest ...
... experiences a net pressure force opposite to its direction of motion. • At some point (point C), the momentum of the fluid in the boundary layer is insufficient to carry the element further into the region of increasing pressure. • The fluid layers adjacent to the solid surface are brought to rest ...
There are several equations useful in understanding hydraulics and
... relationship between fluid flow, the type of bedforms produced along the surface, and the mechanism by which entrained particles move. ...
... relationship between fluid flow, the type of bedforms produced along the surface, and the mechanism by which entrained particles move. ...
Sample Paper
... (a) Viscosity of water is about two orders of magnitude more than that of air (b) Kinematic viscosity of water is less than kinematic viscosity of air (c) Both air and water are Newtonian fluids whereas blood is a non-Newtonian fluid (d) Viscosity of both air and water change with temperature 2. If ...
... (a) Viscosity of water is about two orders of magnitude more than that of air (b) Kinematic viscosity of water is less than kinematic viscosity of air (c) Both air and water are Newtonian fluids whereas blood is a non-Newtonian fluid (d) Viscosity of both air and water change with temperature 2. If ...
Characterization of flow contributions to drag and lift of a circular
... its span (set equal to 1 in two dimensions) and ρ the fluid density. Dp depends on the pressure and takes into account the form drag and the induced drag. The friction drag Df depends on the viscous stress tensor and is known to evolve with the Reynolds number as Re−1/2 [1] (defined as Re = Ud where ...
... its span (set equal to 1 in two dimensions) and ρ the fluid density. Dp depends on the pressure and takes into account the form drag and the induced drag. The friction drag Df depends on the viscous stress tensor and is known to evolve with the Reynolds number as Re−1/2 [1] (defined as Re = Ud where ...
Lecture Notes for First Quiz - Atmospheric and Oceanic Sciences
... pressure increasing downstream favors boundary layer growth and separation airplane wings introduce paired vorticity into flow, related to lift and contrail formation Sports balls curve when the spin drags the boundary layer with medium pressure to one side, but low pressure remains on the other sid ...
... pressure increasing downstream favors boundary layer growth and separation airplane wings introduce paired vorticity into flow, related to lift and contrail formation Sports balls curve when the spin drags the boundary layer with medium pressure to one side, but low pressure remains on the other sid ...
Lab 6: Fluids and Drag - Instructional Physics Lab
... b. However, as it accelerates, the drag force increases to oppose the downward motion, and the faster it goes, the larger the drag force gets. Eventually, the object will be moving fast enough that the drag force is large enough to exactly cancel the external force. c. When this occurs, the net forc ...
... b. However, as it accelerates, the drag force increases to oppose the downward motion, and the faster it goes, the larger the drag force gets. Eventually, the object will be moving fast enough that the drag force is large enough to exactly cancel the external force. c. When this occurs, the net forc ...
Lecture 17 The Simple Science of Flight
... to remain airborne. At lower and higher speeds more power was needed. ...
... to remain airborne. At lower and higher speeds more power was needed. ...
File - The Physics Doctor
... When a sphere moves slowly through a liquid, the relative movement of the liquid around the sphere is laminar As the molecules its passing through will stick to the surface as it travels, a viscous drag (F) is created This force was shown to be related to the radius of the sphere, the velocity of th ...
... When a sphere moves slowly through a liquid, the relative movement of the liquid around the sphere is laminar As the molecules its passing through will stick to the surface as it travels, a viscous drag (F) is created This force was shown to be related to the radius of the sphere, the velocity of th ...
FORMAT INSTRUCTIONS FOR SOMChE 2004 PAPERS
... stability occurs for a centre-of-gravity location of about 40% body length at Mach number above around 1.6, 1.8 and 2 respectively. Such a centre-of-gravity location may not be difficult to achieve with a projectile [10]. ...
... stability occurs for a centre-of-gravity location of about 40% body length at Mach number above around 1.6, 1.8 and 2 respectively. Such a centre-of-gravity location may not be difficult to achieve with a projectile [10]. ...
The Simple Science of Flight The Simple Science of Flight The
... to remain airborne. At lower and higher speeds more power was needed. ...
... to remain airborne. At lower and higher speeds more power was needed. ...
Chapter 4 Resistance
... flow of fluids, charge, or heat. In other situations, resistance is useful—for example, to slow or stop motion of objects and to control flow of fluids, charge, and heat. Mechanical resistance opposes motion between solid surfaces. This opposition is called friction. A force of friction exists whene ...
... flow of fluids, charge, or heat. In other situations, resistance is useful—for example, to slow or stop motion of objects and to control flow of fluids, charge, and heat. Mechanical resistance opposes motion between solid surfaces. This opposition is called friction. A force of friction exists whene ...
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.