Fully developed turbulent pipe flow at Re=11300 as well as Re=5300 is measured by PIV using water as working fluid. Excellent agreement with DNS (Direct Numerical Simulation) by Satake (2000) is achieved by choosing optimum measurement parameters such as spatial resolution, time separation of two images, and number of samples. The test section is 6.7m long stainless steel pipe with transparent ...

In order to enhance the accuracy of the relative velocity measurement for the Mars 13 explorer formation flight, we develop a relative velocity measurement method. In this method, the 14 spectrometers at two Mars explorers are adopted to measure the starlight frequency shift and to 15 estimate the velocity with respect to the star. Unfortunately, the instantaneous velocity of star can 16 not be...

In conventional near-field acoustic holography (NAH) it is not possible to distinguish between sound from the two sides of the array, thus, it is a requirement that all the sources are confined to only one side and radiate into a free field. When this requirement cannot be fulfilled, sound field separation techniques make it possible to distinguish between outgoing and incoming waves from the t...

Traditionally, the automotive industry has been the largest employer of robots, but their control is inline and programmed to follow planning trajectories. In this case, in the motor's department test of Volskwagen México a semi autonomous robot is developed to generally purpose. Some critical technical problems must be solved in a number of areas, including in dynamics and control. Generally, ...

the hydrodynamic behavior of approaching flow and the amount of sediment entry into right-angled lateral intakes in diversion dams were investigated using a laboratory channel by experimental measurement and observation. the velocity field upstream of the intake in the main channel and before it at the sluice gate was measured at different elevations of flow at different discharge rates of the ...

We describe two diagnostic methods for measuring the velocity of mildly relativistic, high current electron beams. The first involves a measurement of the radial electrostatic potential and of the beam current and yields the time resolved, spatially averaged axial beam velocity v,,. The second requires a measurement of the beam cyclotron wavelength in the guiding magnetic field and yields the p...