We investigate the effect of weak rotation on the large-scale circulation (LSC) of turbulent Rayleigh-Bénard convection, using the theory for cessations in a low-dimensional stochastic model of the flow previously studied. We determine the cessation frequency of the LSC as a function of rotation, and calculate the statistics of the amplitude and azimuthal velocity fluctuations of the LSC as a f...

The initial bifurcations in rotating Rayleigh-Bénard convection are studied in the range of dimensionless rotation rate 0 < Ω < 2150 for an aspect-ratio-2.5 cylindrical cell. We used simultaneous optical shadowgraph, heat transport and local temperature measurements to determine the stability and characteristics of the azimuthally-periodic wall convection state. We also show that the second tra...

In this paper, an analysis of electromagnetic–mechanical characteristics according to the shaft materials a permanent magnet synchronous motor was performed. general, electric rotating at high speed uses various materials, considering mechanical rigidity and electromagnetic characteristics. However, because material has significant influence on performance non-magnetic magnetic performed shaft....

1. Jweeg MJ, Alnomani SN, Mohammad SK. Dynamic analysis of a rotating stepped shaft with and without defects. In: IOP Conference Series: Materials Science Engineering. Publishing, 2020:012004.‏ https://doi.org/10.1088/1757-8.... CrossRef Google Scholar

In this paper, the effects of transverse cracks on rotating shaft are studied. According to earlier works, crack shaft failure decrease the critical speed of the shaft and also exhibit a nonlinear vibration behaviour leading to increases the amplitude of 1X and 2X harmonics (first and second order of rotational speed in torsional vibration). This suggests that the application of order analysis ...