EFFICIENCY EVALUATIONS OF A BALLOON POWERED CAR
... In our case, the balloon is attached to a cylindrical nozzle and deflates through it (Figure 1). In this case three forces are exerted to the car; the motivational force which is exerted to the balloon due to the momentum of the outgoing air flow, and two resistive forces which are: Aerodynamic dra ...
... In our case, the balloon is attached to a cylindrical nozzle and deflates through it (Figure 1). In this case three forces are exerted to the car; the motivational force which is exerted to the balloon due to the momentum of the outgoing air flow, and two resistive forces which are: Aerodynamic dra ...
Negative DEP traps for single cell immobilisation†
... which create a closed electric field cage in the centre. The operation of the device was demonstrated by trapping single latex spheres and HeLa cells against a moving fluid. The dielectrophoretic holding force was determined experimentally by measuring the displacement of a trapped particle in a mov ...
... which create a closed electric field cage in the centre. The operation of the device was demonstrated by trapping single latex spheres and HeLa cells against a moving fluid. The dielectrophoretic holding force was determined experimentally by measuring the displacement of a trapped particle in a mov ...
In-flight boundary layer investigations on a Airplane Wing using LDA
... Because of the above mentioned advantages, increased efforts in aerodynamic research and development are presently being observed in connection with the development of the laminar wing technology for commercial aeroplanes. University and governmental research institutes, as well as R&D departments o ...
... Because of the above mentioned advantages, increased efforts in aerodynamic research and development are presently being observed in connection with the development of the laminar wing technology for commercial aeroplanes. University and governmental research institutes, as well as R&D departments o ...
PPT - Modeling & Simulation Lab.
... describes the local spinning motion of a fluid near some point, as would be seen by an observer located at that point and traveling along with the fluid. One way to visualize vorticity is this: consider a fluid flowing. Imagine that some tiny part of the fluid is instantaneously rendered solid, and ...
... describes the local spinning motion of a fluid near some point, as would be seen by an observer located at that point and traveling along with the fluid. One way to visualize vorticity is this: consider a fluid flowing. Imagine that some tiny part of the fluid is instantaneously rendered solid, and ...
Impact of a Jet
... depend on whether or not the fluid stream leaving the impact surface is symmetric relative to the vertical axis of the surface. ...
... depend on whether or not the fluid stream leaving the impact surface is symmetric relative to the vertical axis of the surface. ...
Coupling of Free Flow and Flow in Porous Media
... process of evaporation or drying in soil (see fig 1.1), the infiltration of water and pollutant from the surface into the ground during events of rainfall and pollutant spills respectively. An example on the micro scale is the transfer of therapeutic agents from the blood stream into the surrounding ...
... process of evaporation or drying in soil (see fig 1.1), the infiltration of water and pollutant from the surface into the ground during events of rainfall and pollutant spills respectively. An example on the micro scale is the transfer of therapeutic agents from the blood stream into the surrounding ...
Controls of the behavior of marine debris flows
... Debris flows have relatively high sediment concentrations and generally behave as non-Newtonian fluids. Most of these flows are formed from gravitational slope or soil mass failures. Four stages of debris flow events are commonly identified: initial failure (trigger event), transition, flow, and dep ...
... Debris flows have relatively high sediment concentrations and generally behave as non-Newtonian fluids. Most of these flows are formed from gravitational slope or soil mass failures. Four stages of debris flow events are commonly identified: initial failure (trigger event), transition, flow, and dep ...
Computer simulation of air filtration including electric
... way that the grid resolves the smallest occurring fiber diameter. For example, for smallest fiber radius in the nonwoven 5µm, h = 2.5 µm will resolve this fiber with 4 voxels per diameter. This introduces the next parameter in the model: the side lengths of the cutout. The cutout must be large enoug ...
... way that the grid resolves the smallest occurring fiber diameter. For example, for smallest fiber radius in the nonwoven 5µm, h = 2.5 µm will resolve this fiber with 4 voxels per diameter. This introduces the next parameter in the model: the side lengths of the cutout. The cutout must be large enoug ...
Hydraulic Properties: Permeability And PoROSITY
... spatial scales that are much smaller than the scale for fluid flow. Thus, porosity includes both grain scale porosity generated by densification during devolatilization as well as small scale fractures induced by the consequent dilational, i.e., volume changing, deformation. This porosity is critica ...
... spatial scales that are much smaller than the scale for fluid flow. Thus, porosity includes both grain scale porosity generated by densification during devolatilization as well as small scale fractures induced by the consequent dilational, i.e., volume changing, deformation. This porosity is critica ...
Symposium Papers - Respiratory Care
... 1938, at a temperature near absolute zero, a Russian physicist discovered that liquid helium has virtually no viscosity, a property called superfluidity. Helium is a colorless, odorless, tasteless, nontoxic, nearly inert, monatomic element. It heads the noble gas series on the periodic table, with a ...
... 1938, at a temperature near absolute zero, a Russian physicist discovered that liquid helium has virtually no viscosity, a property called superfluidity. Helium is a colorless, odorless, tasteless, nontoxic, nearly inert, monatomic element. It heads the noble gas series on the periodic table, with a ...
Document
... •Resolution for two close particles might be very high (in our case for larger particles) but it might not be helpful for separation. •Also we can always tune electric field pushes to get high resolution for a specific particle size, so we cannot define an exclusive resolution. Is there a different ...
... •Resolution for two close particles might be very high (in our case for larger particles) but it might not be helpful for separation. •Also we can always tune electric field pushes to get high resolution for a specific particle size, so we cannot define an exclusive resolution. Is there a different ...
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 ...
Chris Kleijn (TUD) Dynamics of droplet breakup in a T
... We quantitatively describe the breakup process and the mechanism of droplet pinch-off. Similar to the formation of droplets at T-junctions [3], the interface of the droplet first moves at a nearly constant speed, after which it rapidly collapses prior to breakup. As we will show, droplet dynamics in ...
... We quantitatively describe the breakup process and the mechanism of droplet pinch-off. Similar to the formation of droplets at T-junctions [3], the interface of the droplet first moves at a nearly constant speed, after which it rapidly collapses prior to breakup. As we will show, droplet dynamics in ...
Electromagnetic force on a magnetic dipole inside
... Experiments are conducted on a horizontal liquid metal loop with the eutectic alloy GaInSn which is liquid at room temperature. Its material parameters include the electrical conductivity σ = 3.46 × 106 S/m, the density ρ = 6.36 × 103 kg/m3 , and the kinematic viscosity ν = 3.4 × 10−7 m2 /s. The flo ...
... Experiments are conducted on a horizontal liquid metal loop with the eutectic alloy GaInSn which is liquid at room temperature. Its material parameters include the electrical conductivity σ = 3.46 × 106 S/m, the density ρ = 6.36 × 103 kg/m3 , and the kinematic viscosity ν = 3.4 × 10−7 m2 /s. The flo ...
Challenges in teaching the mechanics of breathing to
... concept, but it tests the student’s knowledge that whenever ventilation-perfusion inequality is introduced, the net result must be a fall in arterial PO2, with all other things being equal. Choice E, “After 3 days, the compliance of the occluded lobe will be reduced,” is a true statement because alv ...
... concept, but it tests the student’s knowledge that whenever ventilation-perfusion inequality is introduced, the net result must be a fall in arterial PO2, with all other things being equal. Choice E, “After 3 days, the compliance of the occluded lobe will be reduced,” is a true statement because alv ...
Mass Flow Controlled Evaporation System
... 4.1. Boundary conditions for the CEM system A. The physical conditions e.g.: partial pressure and temperature in the evaporator must be chosen so that the state of the fluid is a vapour. B. The vapour flow is limited by the maximum power available in the heater. (for the moment, some 100 Watt) C. Th ...
... 4.1. Boundary conditions for the CEM system A. The physical conditions e.g.: partial pressure and temperature in the evaporator must be chosen so that the state of the fluid is a vapour. B. The vapour flow is limited by the maximum power available in the heater. (for the moment, some 100 Watt) C. Th ...
Lecture 14
... together by weak cohesive forces & by forces exerted by the walls of a container. Both liquids & gases are fluids ...
... together by weak cohesive forces & by forces exerted by the walls of a container. Both liquids & gases are fluids ...
Linear Velocity Measurement - mne.psu.edu - PSU MNE
... A simple example is blowing at your spoon full of soup to cool it down – the rate of convection heat transfer (and thus the rate of cooling of the soup) is increased by blowing cooler air over it. Thermal anemometers consist of an electrically heated sensor, as sketched to the right, along with ...
... A simple example is blowing at your spoon full of soup to cool it down – the rate of convection heat transfer (and thus the rate of cooling of the soup) is increased by blowing cooler air over it. Thermal anemometers consist of an electrically heated sensor, as sketched to the right, along with ...
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.""