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We investigate superfluid flow around an airfoil accelerated to a finite velocity from rest. Using simulations of the Gross-Pitaevskii equation we find striking similarities to viscous flows: from production of starting vortices to convergence of airfoil circulation onto a quantized version of the Kutta-Joukowski circulation. We predict the number of quantized vortices nucleated by a given foil via a phenomenological argument. We further find stall-like behavior governed by airfoil speed, not angle of attack, as in classical flows. Finally we analyze the lift and drag acting on the airfoil.
This article was published in the following journal.
Name: Physical review letters
Birds are known for their extraordinary agility, maneuverability, flexibility and endurance during their flight, even under some adverse flying conditions. Bird wings have been the most inspirational ...
The head-tilt/chin-lift (HT/CL) maneuver is simple and routinely used to open a closed upper airway.
We propose a novel microfluidic device for continuous, label-free and size-selective particle separation. The process consists of two stages: the particle separation based on the pre-focus of sheath f...
Birds fly in dynamic flight conditions while maintaining aerodynamic efficiency. This agility is in part due to specialized feather systems that function as flow control devices during adverse conditi...
To investigate the amount of laryngeal lift during the pitch glide speech task and during a bolus swallow. Modified Barium Swallows (MBS) videos captured speech tasks and bolus trials. Using SwallowTa...
The study is using a new breast lift system to complement a breast-lift operation. In general there will be recurrence of breast-ptosis after a correcting operation. With this device we ...
This is a prospective, open label, multi-center, self-controlled clinical study to demonstrate the safety and efficacy of SofWave treatment to lift lax tissue in the submental and neck zon...
The purpose of this study is to test the use of the Prostatic Urethral Lift (PUL), Urolift®, in prostate cancer (Pca) participants seeking or undergoing radiotherapy for relief of urinary...
This clinical trial will evaluate the safety and efficacy of the Strattice-LIFT procedure to treat anal fistulas.
The sample will be divided into two groups:- - Control group which will include 60 adult individuals between 18 and 35 years old who have BMI between 19 and 25, not complaining of any thig...
Polymeric materials (usually organic) of large molecular weight which can be shaped by flow. Plastic usually refers to the final product with fillers, plasticizers, pigments, and stabilizers included (versus the resin, the homogeneous polymeric starting material). (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
The amount of PLASMA that perfuses the KIDNEYS per unit time, approximately 10% greater than effective renal plasma flow (RENAL PLASMA FLOW, EFFECTIVE). It should be differentiated from the RENAL BLOOD FLOW; (RBF), which refers to the total volume of BLOOD flowing through the renal vasculature, while the renal plasma flow refers to the rate of plasma flow (RPF).
The study of the deformation and flow of matter, usually liquids or fluids, and of the plastic flow of solids. The concept covers consistency, dilatancy, liquefaction, resistance to flow, shearing, thixotrophy, and VISCOSITY.
Ultrasonography applying the Doppler effect, with the superposition of flow information as colors on a gray scale in a real-time image. This type of ultrasonography is well-suited to identifying the location of high-velocity flow (such as in a stenosis) or of mapping the extent of flow in a certain region.
A gas that has been used as an aerosol propellant and is the starting material for polyvinyl resins. Toxicity studies have shown various adverse effects, particularly the occurrence of liver neoplasms.