Results 31 to 40 of about 145,436 (316)

Exact General Relativistic Perfect Fluid Disks with Halos [PDF]

, 2003
Using the well-known ``displace, cut and reflect'' method used to generate disks from given solutions of Einstein field equations, we construct static disks made of perfect fluid based on vacuum Schwarzschild's solution in isotropic coordinates. The same
A.H. Taub, B. Kuchowicz, C. Klein, D. Lynden-Bell, Daniel Vogt, G. González, G.G. Kuzmin, H.A. Buchdahl, J. Bic̆ák, J. Bic̆ák, J. Katz, J.P.S. Lemos, J.P.S. Lemos, J.P.S. Lemos, J.P.S. Lemos, J.P.S. Lemos, L. Morgan, Lord Rayleigh, P.S. Letelier, Patricio S. Letelier, T. Morgan, V.V. Narlikar, W.A. Bonnor   +22 more
core   +2 more sources

On the influence of the tangential solar-motion component [PDF]

Serbian Astronomical Journal, 2002
The influence of the tangential component of the solar motion (towards l = 90o, b = 0o) corrected for the value of the asymmetric drift, on the galactocentric orbits of selected nearby stars is studied.
Ninković Slobodan D.
doaj   +1 more source

A new forecasting method for failure time of creep landslide based on nonlinear creep behavior and new pre-warning criterion

Frontiers in Earth Science, 2022
The forecast of failure time of unstable slope and the definition of early warning threshold are very important for preventing landslide disaster and reducing its losses.
Shuo Zhang, Shuo Zhang, Tong Jiang, Xiangjun Pei, Runqiu Huang, Qiang Xu, Yushan Xie, Yushan Xie, Xuwei Pan, Longxiao Zhi   +9 more
doaj   +1 more source

Targets’ Radial and Tangential Velocities Estimation Based on Vortex Electromagnetic Waves

Remote Sensing, 2022
The orbital angular momentum (OAM) of a vortex electromagnetic wave (VEW) has gained attention as a newly explored information carrier. OAM modes provide vortex azimuth resolution, which is a new degree of freedom (DOF) in radar application. Due to the special characteristics of the vortex azimuth domain, VEW shares compound Doppler information of two ...
Caipin Li, Shengyuan Li, Dong You, Wencan Peng, Jinwei Li, Yu Li, Qiang Li, Zhanye Chen   +7 more
openaire   +2 more sources

Image analysis for velocity profile estimation in A-SOFT hybrid rocket combustor

Journal of Fluid Science and Technology, 2018
Altering-intensity Swirling-Oxidizer-Flow-Type (A-SOFT) hybrid rocket engine (HRE) was proposed as a technique to solve problems of current hybrid rockets.
Nobuhiro KIMURA, Kei OBATA, Koki KITAGAWA, Toru SHIMADA   +3 more
doaj   +1 more source

Experimental Study on Flocculation Effect of Tangential Velocity in a Cone-Plate Clarifier

Separations, 2021
A large number of particles with small size and light density in mine water are difficult to remove by traditional separation equipment. In order to improve the efficiency of mine water treatment, a cone-plate clarifier is proposed in this paper.
Yulong Zhang, Peikun Liu, Linjing Xiao, Yuekan Zhang, Xinghua Yang, Lanyue Jiang   +5 more
doaj   +1 more source

Kinematics of Spiral Arm Streaming in M51 [PDF]

, 2007
We use CO and H alpha velocity fields to study the gas kinematics in the spiral arms and interarms of M51 (NGC 5194), and fit the 2D velocity field to estimate the radial and tangential velocity components as a function of spiral phase (arm distance). We
Begeman K. G., Eve C. Ostriker, Jensen J. B., Kuno N., Lindblad B., Merrifield M. R., Nakai N., Nakai N., Peter J. Teuben, Rahul Shetty, Strong A. W., Stuart N. Vogel, Tully R. B., van der Kruit P. C., Visser H. C. D.   +14 more
core   +2 more sources

Molecular dynamics simulation of gas-solid interaction on the surface of ultra-low orbit spacecraft

Kongqi donglixue xuebao
In order to accurately simulate the aerodynamic characteristics and optimize the aerodynamic layout of spacecraft in ultra-low orbit, based on the physical mechanism of high-speed incoming gas and wall interaction faced by ultra-low orbit spacecraft ...
Yuzhu YAO, Fei HUANG, Xuhong JIN, Xiaoli CHENG   +3 more
doaj   +1 more source

Heat Transfer at the Bottom of a Cylindrical Vessel Impinged by a Swirling Flow from an Impeller in a Draft Tube [PDF]

Chemical and Biochemical Engineering Quarterly, 2017
Heat transfer at the bottom of a cylindrical vessel impinged by a flow with tangential velocity component generated by an axial-flow impeller in a draft tube was measured using the electrodiffusion experimental method.
K. Petera, M. Dostál, M. Věříšová, T. Jirout   +3 more
doaj   +1 more source

On the direction of Coriolis force and the angular momentum conservation

Revista Brasileira de Ensino de Física
This paper presents a qualitative analysis of the Coriolis force direction using the conservation of angular momentum and comparing it with quantitative calculation. In order to understand the implications of the theoretical expression for Coriolis force,
Eduardo Herrera, Sigrid Morett
doaj   +1 more source