Results 261 to 270 of about 12,197 (302)

Oscillatory flow in a stepped channel

Journal of Fluid Mechanics, 1993
Two-dimensional, unsteady flow of a viscous, incompressible fluid in a stepped channel has been studied by the numerical solution of the Navier–Stokes equation using an accurate finite-difference method.With a sinusoidal mass flow rate, the problem has three governing parameters: the Reynolds number, the Strouhal number, and the step height.
O. R. Tutty, T. J. Pedley
openaire   +1 more source

N2 emission-channel change in NO reduction over stepped Pd(211) by angle-resolved desorption [PDF]

Surface Science, 2012
A sharp change in the N2 emission channel from N2O(a) → N2(g) + O(a) to N(a) + N(a) → N2(g) has been found at around 500 K in a steady-state NO + D2 reaction over stepped Pd(211) = [(S)3(111) × (100)] by means of angle-resolved desorption.
Tatsuo Matsushima, Anton Kokalj, Hideo Orita   +2 more
exaly   +2 more sources

Blobs, channels and “cigars”: Morphologies of liquids at a step

The European Physical Journal E, 2004
We have studied the equilibria of liquid droplets wetting a step edge with an opening angle 0 < alpha < pi by a combination of analytical and numerical methods. Depending on the wetting properties of the substrate walls and on the liquid volume, different locally or globally stable liquid morphologies are found.
M, Brinkmann, R, Blossey
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Laminar flow in a channel with a step

Journal of Engineering Mathematics, 1972
In this paper we investigated numerically the laminar flow of a homogeneous, viscous incompressible liquid, through a channel with a step. We used one numerical approach for small Reynolds numbers, and a different method for large numbers. Streamlines were calculated with high accuracy using a relatively small amount of computer time.
openaire   +2 more sources

An investigation of a potential step at a channel electrode

Journal of Applied Electrochemistry, 1989
The present paper deals with a theoretical investigation of a potential step at a channel electrode. The study consists in the numerical solution of the partial differential equations relevant to the transient mass balance in the vicinity of the electrode, taking into account the convective term.
F. Lapicque, J. M. Hornut, G. Valentin, A. Storck   +3 more
openaire   +1 more source

Mixing Enhancement by Microrotor in Step Channel

Journal of Fluids Engineering, 2011
In this paper, the mixing enhancement of a micromixer consisting of a step channel and a shuttlecock rotor suspended in the step is numerically analyzed. Asymptotic mixing performance is investigated as a function of Strouhal and Peclet numbers by particle tracking simulation and the Eulerian approach. The simulation results show that the rotor creates
Thien X. Dinh, Yoshifumi Ogami
openaire   +1 more source

Design Of Ble 2-Step Separate Channel Fingerprinting

2020 IEEE 91st Vehicular Technology Conference (VTC2020-Spring), 2020
Bluetooth Low Energy (BLE)-based localization is a promising candidate of indoor localization for low power mobile and Internet of Things (IoT) systems. Localization accuracy of BLE-based localization systems is lower than other localization technologies relying on wideband wireless communication such as WiFi due to limited channel bandwidth.
Takahiro Yamamoto, Shigemi Ishida, Ryota Kimoto, Shigeaki Tagashira, Akira Fukuda   +4 more
openaire   +1 more source

Radiation losses of step-tapered channel waveguides

Applied Optics, 1980
We compute the radiation losses of a rectangular dielectric waveguide (integrated optics channel waveguide) that is tapered so that its wider cross-sectional dimension increases by roughly a factor of three while its narrow dimension remains constant. As the waveguide widens its refractive index decreases to ensure that the waveguide supports only one ...
openaire   +2 more sources

Waves behind a Step in an Open Channel

Journal of Applied Mechanics and Technical Physics, 2003
The paper presents experimental data on flow in the vicinity of a sudden elevation of channel bottom (step). The range of external flow parameters is considered for the case where the step generates waves. A distinguishing feature of these waves is that they are formed in transition from subcritical to supercritical flow.
V. I. Bukreev, A. V. Gusev
openaire   +1 more source

A variable step-size sign algorithm for channel estimation

Signal Processing, 2014
This paper proposes a new variable step-size sign algorithm (VSSA) for unknown channel estimation or system identification, and applies this algorithm to an environment containing two-component Gaussian mixture observation noise. The step size is adjusted using the gradient-based weighted average of the sign algorithm.
Yuan-Ping Li, Ta-Sung Lee, Bing-Fei Wu
openaire   +1 more source