BioFluids Lecture 3: Flagellar swimming – resistive
... tangential motion if a is small enough. Because of the linearity of the Stokes equations, motion in an oblique direction can be considered as a suitable sum of the normal and horizontal flows. Resistive Force Theory Let us now consider a thin flagellum, which undergoes prescribed motion. We would li ...
... tangential motion if a is small enough. Because of the linearity of the Stokes equations, motion in an oblique direction can be considered as a suitable sum of the normal and horizontal flows. Resistive Force Theory Let us now consider a thin flagellum, which undergoes prescribed motion. We would li ...
Design specifications
... flow rates of not only small displacement engines, but engines with displacements of up to 5.7L. This brings in two aspects: the Maximum Output flow rate and the Dynamic Range of flow rates. The Maximum Output flow rate is the flow rate output of by the device when the inlet receives 4 bar,g of pres ...
... flow rates of not only small displacement engines, but engines with displacements of up to 5.7L. This brings in two aspects: the Maximum Output flow rate and the Dynamic Range of flow rates. The Maximum Output flow rate is the flow rate output of by the device when the inlet receives 4 bar,g of pres ...
Document
... With fluids, we are interested in the extended substance and in properties that can vary from point to point in that substance. It is more useful to speak of density and pressure than of mass and force. Density For a small volume element dV around a point and measure the mass dm of the fluid contain ...
... With fluids, we are interested in the extended substance and in properties that can vary from point to point in that substance. It is more useful to speak of density and pressure than of mass and force. Density For a small volume element dV around a point and measure the mass dm of the fluid contain ...
Force as a vector Vectors Pressure Gradient force Pressure gradient
... • 4) remember that Fc takes a relatively long time to have an effect, so phenomena like tornadoes, thunderstorms, etc. are NOT affected by it. • 5) In valleys btwn mountains, where flow is channeled, Fc is not important and the wind will blow towards the low pressure as much as possible. This mean ...
... • 4) remember that Fc takes a relatively long time to have an effect, so phenomena like tornadoes, thunderstorms, etc. are NOT affected by it. • 5) In valleys btwn mountains, where flow is channeled, Fc is not important and the wind will blow towards the low pressure as much as possible. This mean ...
An Aerodynamicist`s View of Lift, Bernoulli, and Newton
... relatively small region of the flow field. This is a standard wind-tunnel experiment that my classes do every semester. Measuring lift by measuring the increase in downward vertical velocity in the flow coming off the trailing edge of the airfoil is conceptually possible. This downward velocity is d ...
... relatively small region of the flow field. This is a standard wind-tunnel experiment that my classes do every semester. Measuring lift by measuring the increase in downward vertical velocity in the flow coming off the trailing edge of the airfoil is conceptually possible. This downward velocity is d ...
Voltage, Current, Resistance, Capacitance and Inductance
... • 0 volts Logic 0 • 5 volts Logic 1 – Often not 5 volts, but 3, or 2.7 or 1.5… – Actual signal is analogue • Interpretation (0 or 1) changes at some in-between voltage ...
... • 0 volts Logic 0 • 5 volts Logic 1 – Often not 5 volts, but 3, or 2.7 or 1.5… – Actual signal is analogue • Interpretation (0 or 1) changes at some in-between voltage ...
Dimensional Analysis and Correlations
... viscosity and the particle velocity relative to the fluid for the following reason. When the particle moves relative to the fluid, the flow pattern generated alters the distribution of the solute around the particles, and thereby modifies the diffusion flux at the particle surface. The flow pattern, ...
... viscosity and the particle velocity relative to the fluid for the following reason. When the particle moves relative to the fluid, the flow pattern generated alters the distribution of the solute around the particles, and thereby modifies the diffusion flux at the particle surface. The flow pattern, ...
PM5 RHEOLOGY
... Before leaving non-newtonian fluids, one further complication needs to be mentioned viz. that there are some fluids whose viscous behaviour depends very much on the time they have been sheared and the time they have been at rest. There are two types of these. The thixotropic fluids are like the pseu ...
... Before leaving non-newtonian fluids, one further complication needs to be mentioned viz. that there are some fluids whose viscous behaviour depends very much on the time they have been sheared and the time they have been at rest. There are two types of these. The thixotropic fluids are like the pseu ...
1703-5823-1-SP - AGH University of Science and Technology
... vehicle double-tube shock absorber. The model accounts for the effects of compressibility, valve stiction, inertia, etc. and can be suitable for use in the analyses on flow-induced pressure fluctuations in the device. The author highlights all major variables to influence the output of the shock abs ...
... vehicle double-tube shock absorber. The model accounts for the effects of compressibility, valve stiction, inertia, etc. and can be suitable for use in the analyses on flow-induced pressure fluctuations in the device. The author highlights all major variables to influence the output of the shock abs ...
... impact on following aircraft. Safety rules defining minimum distances between landing and taking off aircrafts are based on the strength and temporal duration of dissipation of the vortex turbulence. The wing tip vortex position is of major interest because interactions with vortices generated from ...
Boundary Layer Control by Means of Electromagnetic Forces
... Looking at the rms–values of the streamwise component a damping due to the applied force near the wall is found, an effect already described in the experiments of Henoch and Stace [5]. A strong acceleration, as caused by a favorable pressure gradient, has a relaminarizing effect on the flow [16]. Di ...
... Looking at the rms–values of the streamwise component a damping due to the applied force near the wall is found, an effect already described in the experiments of Henoch and Stace [5]. A strong acceleration, as caused by a favorable pressure gradient, has a relaminarizing effect on the flow [16]. Di ...
Fluid Mechanics
... much there is of a quantity in a given amount of space. – Quantity can be anything; # of trees or people, or amount of mass or energy ...
... much there is of a quantity in a given amount of space. – Quantity can be anything; # of trees or people, or amount of mass or energy ...
Blood flow modeling in a synthetic cylindrical vessel for validating
... imaging sequences using a computer unit (cf. Fig. 1). This allows us to replace real image data with a 3D digital model of human vessels. A properly implemented simulator working on known patterns will create an effective and objective criterion of validation for image segmentation methods. In stand ...
... imaging sequences using a computer unit (cf. Fig. 1). This allows us to replace real image data with a 3D digital model of human vessels. A properly implemented simulator working on known patterns will create an effective and objective criterion of validation for image segmentation methods. In stand ...
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.""