Drag and Drag Coefficients
... The Reynolds number at which the attached boundary layer becomes turbulent is called critical Reynolds for drag. The curves of CD versus Rep for an infinitely long cylinder normal to the flow is much like that for a sphere, but at low Reynolds numbers, CD does not vary inversely with Rep because ...
... The Reynolds number at which the attached boundary layer becomes turbulent is called critical Reynolds for drag. The curves of CD versus Rep for an infinitely long cylinder normal to the flow is much like that for a sphere, but at low Reynolds numbers, CD does not vary inversely with Rep because ...
The Role of Upstream Waves and a Downstream Density Pool in the
... ‘‘Upstream influence’’ is a term that arises in the calculation of the flow over an obstacle. In an infinite depth flow with an upstream flow speed (U), a background stratification (N), and an obstacle height (h) small enough so that Nh/U & 0.75, Long’s solution allows us to calculate the flow over ...
... ‘‘Upstream influence’’ is a term that arises in the calculation of the flow over an obstacle. In an infinite depth flow with an upstream flow speed (U), a background stratification (N), and an obstacle height (h) small enough so that Nh/U & 0.75, Long’s solution allows us to calculate the flow over ...
A study on the derivation of a mean velocity formula from
... Accordingly, the fast and accurate estimation of discharge is a prerequisite for preventing and coping with disasters. In order to estimate highly reliable discharge, which is an important element in planning, evaluating and managing water resources and in designing hydraulic structures, it is essen ...
... Accordingly, the fast and accurate estimation of discharge is a prerequisite for preventing and coping with disasters. In order to estimate highly reliable discharge, which is an important element in planning, evaluating and managing water resources and in designing hydraulic structures, it is essen ...
956 aperture 5
... The numerical solution of the incompressible unsteady Navier-Stokes equations is performed using the finite-volume method on a staggered grid. The convective term is discretized using the Quadratic Upwind Interpolation for Convective Kinematics (QUICK) (Hayase et al. (1992)). The Semi-Implicit Metho ...
... The numerical solution of the incompressible unsteady Navier-Stokes equations is performed using the finite-volume method on a staggered grid. The convective term is discretized using the Quadratic Upwind Interpolation for Convective Kinematics (QUICK) (Hayase et al. (1992)). The Semi-Implicit Metho ...
flow around wall-mounted cylinders with different geometries
... Abstract. The flow field around cylindrical structures such as pantographs of trains, highrise buildings, car antennas, beams, fences and supports in internal and external flows is very complex. Topic of the present work is the investigation of the flow around simplified wallmounted cylindrical geom ...
... Abstract. The flow field around cylindrical structures such as pantographs of trains, highrise buildings, car antennas, beams, fences and supports in internal and external flows is very complex. Topic of the present work is the investigation of the flow around simplified wallmounted cylindrical geom ...
Sample pages 2 PDF
... fluid-solid interface is mostly used assumption in fluid mechanics. But the no-slip condition is not valid in case of flow in micro/nano-channels, aerosol particles, flow through porous media and variety of complex fluids such as polymer solution, molten polymer, emulsion and foam [1–4]. Because of ...
... fluid-solid interface is mostly used assumption in fluid mechanics. But the no-slip condition is not valid in case of flow in micro/nano-channels, aerosol particles, flow through porous media and variety of complex fluids such as polymer solution, molten polymer, emulsion and foam [1–4]. Because of ...
319 bladerunner
... balance. The Rayleigh–Plesset bubble is an exact viscous potential flow analysis of the Navier–Stokes equations; this solution works perfectly for all viscous liquids; it is not an asymptotic result. Viscous potential flow analysis of problems for Rayleigh– Taylor instability (Joseph, Belanger & Beave ...
... balance. The Rayleigh–Plesset bubble is an exact viscous potential flow analysis of the Navier–Stokes equations; this solution works perfectly for all viscous liquids; it is not an asymptotic result. Viscous potential flow analysis of problems for Rayleigh– Taylor instability (Joseph, Belanger & Beave ...
Simulation of Flow and Heat Transfer Through Packed Beds of
... of using a physics controlled mesh in COMSOL is that it will automatically refine the mesh near the ...
... of using a physics controlled mesh in COMSOL is that it will automatically refine the mesh near the ...
Introduction of compressible flow
... In studying compressible flows, another variable, the entropy, s, has to be introduced. The entropy basically places limitations on which flow processes are physically possible and which are physically excluded. The entropy change between any two points in the flow is given by ; ...
... In studying compressible flows, another variable, the entropy, s, has to be introduced. The entropy basically places limitations on which flow processes are physically possible and which are physically excluded. The entropy change between any two points in the flow is given by ; ...
DESIGN OF OFFSHORE PIPELINE(HE801)
... DESIGN OF OFFSHORE PIPELINE(HE801) 1. Explain in detail about wave force components on submarine pipeline near bottom with neat sketch. 2. Describe with neat sketch about change in lift force with increasing velocity. 3. Discuss about the relationship between ɸ , k and CL and the parameters definin ...
... DESIGN OF OFFSHORE PIPELINE(HE801) 1. Explain in detail about wave force components on submarine pipeline near bottom with neat sketch. 2. Describe with neat sketch about change in lift force with increasing velocity. 3. Discuss about the relationship between ɸ , k and CL and the parameters definin ...
chapter 2 properties of fluids
... The viscosity of a fluid is to be measured by viscometer constructed of two 40-cm-long concentric cylinders (Fig. 218).the outer diameter of the inner cylinder is 12 cm, and the gap between the two cylinders is 0.15 cm. The inner cylinder is rotated at 300 rpm, and the torque is measured to be 1.8 N ...
... The viscosity of a fluid is to be measured by viscometer constructed of two 40-cm-long concentric cylinders (Fig. 218).the outer diameter of the inner cylinder is 12 cm, and the gap between the two cylinders is 0.15 cm. The inner cylinder is rotated at 300 rpm, and the torque is measured to be 1.8 N ...
Chapter 3: Channel Controls
... If the entrance is not properly shaped, a contraction of the jet occurs as in sketches a, c and h, and the area of the jet is not as great as the area of the orifice or tube. For properly rounded approaches to orifices as in sketches b and e, and the constant diameter short tubes, the diameter of th ...
... If the entrance is not properly shaped, a contraction of the jet occurs as in sketches a, c and h, and the area of the jet is not as great as the area of the orifice or tube. For properly rounded approaches to orifices as in sketches b and e, and the constant diameter short tubes, the diameter of th ...
LES_of_Tube_Bundles_S_Banhamadouche,_I_Afgan,_D_Laurance,_C_Moulinec,_Nureth_11_France.pdf
... for the pressure field is noticed. This is strange as the case was sensitive to the pressure accuracy with STAR CCM while using L z = D . This is a first indication that one has to take at least L z = 2 D to compute this case to be insensitive to the periodic boundary conditions in the spanwise dire ...
... for the pressure field is noticed. This is strange as the case was sensitive to the pressure accuracy with STAR CCM while using L z = D . This is a first indication that one has to take at least L z = 2 D to compute this case to be insensitive to the periodic boundary conditions in the spanwise dire ...
The Hydrodynamics of Flow Stimuli - McHenry Lab
... Flow is sensed at the surface of a fish’s body and viscosity plays a key role at this interface. By adhering to the surface, a spatial gradient in velocity is created between the surface and freestream flow. This gradient, known as the boundary layer, varies with the nature of freestream flow and th ...
... Flow is sensed at the surface of a fish’s body and viscosity plays a key role at this interface. By adhering to the surface, a spatial gradient in velocity is created between the surface and freestream flow. This gradient, known as the boundary layer, varies with the nature of freestream flow and th ...
Relative motion of lung and chest wall promotes uniform pleural
... varies with (T*)1/3. Accordingly, we looked specifically at the deflection of deformable membrane d(x), normalized by the maximum deflection dmax, as a function of axial distance x for T*= 0.1, 1.0, 10, and 100 (Fig. 5, top panel). Normalized membrane deflection indeed exhibits damped sinusoidal beh ...
... varies with (T*)1/3. Accordingly, we looked specifically at the deflection of deformable membrane d(x), normalized by the maximum deflection dmax, as a function of axial distance x for T*= 0.1, 1.0, 10, and 100 (Fig. 5, top panel). Normalized membrane deflection indeed exhibits damped sinusoidal beh ...
Volume of Fluid (VOF) Method for the Dynamics of Free
... elements. In an Eulerian representation the grid remains fixed and the identity of individual fluid elements is not maintained. Nevertheless, it is customary to view the fluid in an Eulerian mesh cell as a fluid element on which body and surface force may be computed, in a manner competely analogous ...
... elements. In an Eulerian representation the grid remains fixed and the identity of individual fluid elements is not maintained. Nevertheless, it is customary to view the fluid in an Eulerian mesh cell as a fluid element on which body and surface force may be computed, in a manner competely analogous ...
boundary-layer thickness - Icivil-Hu
... of the “no-slip” condition at the surface; that is, the fluid velocity at the surface must be zero. As the fluid particles next to the plate pass close to the leading edge of the plate, a retarding force (from the shear stress) begins to act on the particles to slow them down. As these particles pro ...
... of the “no-slip” condition at the surface; that is, the fluid velocity at the surface must be zero. As the fluid particles next to the plate pass close to the leading edge of the plate, a retarding force (from the shear stress) begins to act on the particles to slow them down. As these particles pro ...
The Physics of Flow
... Although all the molecules are moving in straight lines they are not all uniform in their velocity. If the mean velocity of the flow is v, then the molecules at the centre of the tube are moving at approximately 2v (twice the mean), whilst the molecules at the side of the tube are almost stationary ...
... Although all the molecules are moving in straight lines they are not all uniform in their velocity. If the mean velocity of the flow is v, then the molecules at the centre of the tube are moving at approximately 2v (twice the mean), whilst the molecules at the side of the tube are almost stationary ...
Coastal Erosion Studies—A Review
... values of velocity and sand concentration. The bijker (1971) [7] formula is an example of a widely-used time-averaged transport formula where the total net transport is always in the direction of the mean current and the wave-related transport component is not taken into account. Thus, taking the ab ...
... values of velocity and sand concentration. The bijker (1971) [7] formula is an example of a widely-used time-averaged transport formula where the total net transport is always in the direction of the mean current and the wave-related transport component is not taken into account. Thus, taking the ab ...
bioslurping – horizontal radial flow – theory and experimental
... the groundwater. Then an extraction tube of about one-inch in diameter was inserted into the well, located preferably at the interface of the contaminant and the water since the location of the interface can easily be identified. A vacuum was connected to the extraction tube and the contaminant remo ...
... the groundwater. Then an extraction tube of about one-inch in diameter was inserted into the well, located preferably at the interface of the contaminant and the water since the location of the interface can easily be identified. A vacuum was connected to the extraction tube and the contaminant remo ...
momentum principle
... 2) Mass is conserved absolutely (never changes in classical physics); Momentum is conserved unless a force is applied. 3) Mass conservation is a scalar equation; Momentum conservation is a vector equation (3 equations). ...
... 2) Mass is conserved absolutely (never changes in classical physics); Momentum is conserved unless a force is applied. 3) Mass conservation is a scalar equation; Momentum conservation is a vector equation (3 equations). ...
momentum principle
... 2) Mass is conserved absolutely (never changes in classical physics); Momentum is conserved unless a force is applied. 3) Mass conservation is a scalar equation; Momentum conservation is a vector equation (3 equations). ...
... 2) Mass is conserved absolutely (never changes in classical physics); Momentum is conserved unless a force is applied. 3) Mass conservation is a scalar equation; Momentum conservation is a vector equation (3 equations). ...
Mechanical model of the turbulence generation in the
... confusor to the diffusor flow takes place (in case of subsonic velocities), there are very strong perturbations prompting either a detachment of the flow from walls or its localized (wall-side) additional turbulization with subsequent drop of pressure pulsations in the direction of the main flow. If ...
... confusor to the diffusor flow takes place (in case of subsonic velocities), there are very strong perturbations prompting either a detachment of the flow from walls or its localized (wall-side) additional turbulization with subsequent drop of pressure pulsations in the direction of the main flow. If ...
Fluid Properties - The GATE Academy
... Specific weight / weight density Specific weight of the fluid is defined as the weight it possesses per unit volume at a specified pressure and temperature. It is denoted by symbol ‘ω’. Weight mg ω = volume = V = ρg Its SI unit is N/m3. The dimension of weight density is ML-2T-2. Specific weight de ...
... Specific weight / weight density Specific weight of the fluid is defined as the weight it possesses per unit volume at a specified pressure and temperature. It is denoted by symbol ‘ω’. Weight mg ω = volume = V = ρg Its SI unit is N/m3. The dimension of weight density is ML-2T-2. Specific weight de ...
Pyramidal and toroidal water drops after impact on a
... using an ordered list of marker particles (xi , yi ), 1 6 i 6 N. A list of connected polynomials (pix (s), piy (s)) is constructed using the marker particles and gives a parametric representation of the interface, with s an approximation of the arclength. Both lists are ordered and thus identify the ...
... using an ordered list of marker particles (xi , yi ), 1 6 i 6 N. A list of connected polynomials (pix (s), piy (s)) is constructed using the marker particles and gives a parametric representation of the interface, with s an approximation of the arclength. Both lists are ordered and thus identify the ...
Airy wave theory
In fluid dynamics, Airy wave theory (often referred to as linear wave theory) gives a linearised description of the propagation of gravity waves on the surface of a homogeneous fluid layer. The theory assumes that the fluid layer has a uniform mean depth, and that the fluid flow is inviscid, incompressible and irrotational. This theory was first published, in correct form, by George Biddell Airy in the 19th century.Airy wave theory is often applied in ocean engineering and coastal engineering for the modelling of random sea states – giving a description of the wave kinematics and dynamics of high-enough accuracy for many purposes. Further, several second-order nonlinear properties of surface gravity waves, and their propagation, can be estimated from its results. Airy wave theory is also a good approximation for tsunami waves in the ocean, before they steepen near the coast.This linear theory is often used to get a quick and rough estimate of wave characteristics and their effects. This approximation is accurate for small ratios of the wave height to water depth (for waves in shallow water), and wave height to wavelength (for waves in deep water).