نتایج جستجو برای: wake region
تعداد نتایج: 557905 فیلتر نتایج به سال:
Robots that operate at a disaster site have been proposed and the dispatch of rescue robots to such is required. However, discussion on transport these insufficient. One method transporting use an airplane parachute. In order safely drop by parachute, it important investigate aerodynamics characteristics in free fall before opening present study, fluidic forces acted robot wake velocities behin...
Abstract In a gas fluidized bed, bubbles are mainly responsible for the displacement and mixing of bed particles, with direct impact on heat mass transfer. this work, motion solids in wake region an isolated bubble rising vibrated is experimentally studied using combined digital image averaging techniques. The results show that behavior depends vibration phase position bed. Particles penetrate ...
This work investigates the ability of Coanda jet blowing to modify the base pressure of a cylindrical body aligned axially in a flow, and thereby, produce overall drag reduction. It is found that blowing through one or two slot jets concentric to the outer body circumference can significantly influence the entire base flow region. The recirculating wake is eliminated and is replaced by freestre...
PRIMARY OBJECTIVE To determine the mood profile and sleep functioning of a patient with left anterior temporal region damage characterized by post-operative symptoms of mania. METHODS AND PROCEDURES In a structured clinical assessment, the patient's mood status, psychiatric diagnosis and sleep functioning - sleep onset latency, total sleep time, wake after sleep onset - were assessed. The sle...
Laser wakefield acceleration of electrons holds great promise for producing ultracompact stages of GeV scale, high-quality electron beams for applications such as x-ray free electron lasers and high-energy colliders. Ultrahigh intensity laser pulses can be self-guided by relativistic plasma waves (the wake) over tens of vacuum diffraction lengths, to give >1 GeV energy in centimeter-scale low ...
A theoretical analysis of three–dimensional cavitating flows based on a boundary element approach which includes rotational and viscous flow effects is presented. Partial sheet cavitation is studied by a closed–cavity nonlinear model which includes the prediction of the cavity detachment point. The trailing vorticity path is described by a wake– alignment technique. Viscosity effects are includ...
Linear stability analysis of the three dimensional plane wake flow is performed using a mapped finite di?erence scheme in a domain which is doubly infinite in the cross–stream direction of wake flow. The physical domain in cross–stream direction is mapped to the computational domain using a cotangent mapping of the form y = ?cot(??). The Squire transformation [2], proposed by Squire, is also us...
A review is presented covering the latest contributions to the slow viscoelastic flow past solid spheres and bubbles. The existing theoretical approaches are reviewed together with the available numerical methods. The proximity of container walls and its effect upon the motion of a sphere is also considered. Emphasis has been made on presenting recent experimental and numerical work intended to...
The quasistatic magnetic field generated by short laser pulse in a uniform rarefied plasma is found analytically and compared to that of two-dimensional particle simulations. It is shown that an axisymmetric laser pulse generates an azimuthal magnetic field the structure of which is rather complicated inside the laser pulse body. Behind the pulse in the wake region the magnetic field contains a...
The wake behind a circular cylinder in Mach 4 flow is examined experimentally in the Reynolds number range 2× 104 to 5× 105. Periodic oscillations of the sliplines in the wake are observed. The Strouhal number of the oscillations based on the diameter of the cylinder is found to increase monotonically from 0.30 to 0.50 with increasing Reynolds number. If the Strouhal number is formed using the ...
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