Observation and simulation of the ionosphere disturbance waves triggered by rocket exhausts

2017 ◽  
Vol 122 (8) ◽  
pp. 8868-8882 ◽  
Author(s):  
Charles C. H. Lin ◽  
Chia-Hung Chen ◽  
Mitsuru Matsumura ◽  
Jia-Ting Lin ◽  
Yoshihiro Kakinami
Keyword(s):  
Disturbance Waves ◽  
Ionosphere Disturbance

scholarly journals Stability of Disturbance Waves in Developing Shear Flows: A Review of ‘Ad-hoc’ Methods

2015 ◽  
Vol 105 ◽  
pp. 335-345
Author(s):  
P.K. Sen ◽  
S. Hegde ◽  
A. R. Paul
Keyword(s):  
Shear Flows ◽  
Ad Hoc ◽  
Disturbance Waves

The effect of high-frequency oscillations on the disturbance waves in annular flow

2021 ◽  
pp. 103754
Author(s):  
Andrey V. Cherdantsev ◽  
Sergey V. Isaenkov ◽  
Mikhail V. Cherdantsev ◽  
Dmitry M. Markovich
Keyword(s):  
High Frequency ◽  
Annular Flow ◽  
High Frequency Oscillations ◽  
Disturbance Waves

Measurement of Liquid Film Thickness for Annular Two-Phase HFC134a Gas-Liquid Ethanol Flow in the Vertical Tube

2021 ◽  
Author(s):  
Huacheng Zhang ◽  
Tutomo Hisano ◽  
Shoji Mori ◽  
Hiroyuki Yoshida
Keyword(s):  
Film Thickness ◽  
Liquid Film ◽  
Thin Liquid Film ◽  
Atmospheric Condition ◽  
Heating Surface ◽  
Operating Conditions ◽  
Liquid Film Thickness ◽  
Two Phase ◽  
Disturbance Waves ◽  
Analytical Approaches

Abstract Annular gas-liquid two-phase flows, such as the flows attached to the fuel rods of boiling water reactors (BWR), are a prevalent occurrence in industrial processes. At the gas-liquid interface of such flows, disturbance waves with diverse velocity and amplitude commonly arise. Since the thin liquid film between two successive disturbance waves leads to the dryout on the heating surface and limits the performance of the BWRs, complete knowledge of the disturbance waves is of great importance for the characterized properties of disturbance waves. The properties of disturbance waves have been studied by numerous researchers through extensive experimental and analytical approaches. However, most of the experimental data and analyses available in the literature are limited to the near atmospheric condition. In consideration of the properties of liquids and gases under atmospheric pressure which are distinct from those under BWR operating conditions (7 MPa, 285 °C), we employed the HFC134a gas and liquid ethanol whose properties at relatively low pressure and temperature (0.7 MPa, 40 °C) are similar to those of steam and water under BWR operating conditions as working fluids in a tubular test section having an inside diameter 5.0mm. Meanwhile, the liquid film thickness is measured by conductance probes. In this study, we report the liquid film thickness characteristics in a two-phase HFC134a gas-liquid ethanol flow. A simple model of the height of a disturbance wave was also proposed.

Analysis of spatial and temporal evolution of disturbance waves and ripples in annular gas–liquid flow

2014 ◽  
Vol 67 ◽  
pp. 122-134 ◽  
Author(s):  
Sergey V. Alekseenko ◽  
Andrey V. Cherdantsev ◽  
Oksana M. Heinz ◽  
Sergey M. Kharlamov ◽  
Dmitriy M. Markovich
Keyword(s):  
Liquid Flow ◽  
Temporal Evolution ◽  
Disturbance Waves ◽  
Gas Liquid Flow

scholarly journals The role of disturbance waves in nucleate boiling in annular flow

2018 ◽  
Vol 116 ◽  
pp. 609-616 ◽  
Author(s):  
Junfeng Yang ◽  
Frederic Sebilleau ◽  
Geoffrey F. Hewitt
Keyword(s):  
Annular Flow ◽  
Nucleate Boiling ◽  
Disturbance Waves

scholarly journals An experimental study of disturbance waves in boiling two-phase flow.

1985 ◽  
Vol 51 (463) ◽  
pp. 1026-1032
Author(s):  
Shigeyasu NAKANISHI ◽  
Masuo KAJI ◽  
Shoji YAMAUCHI ◽  
To'oru SAWAI
Keyword(s):  
Experimental Study ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Two Phase ◽  
Disturbance Waves

The growth of localized disturbances in a laminar boundary layer

1962 ◽  
Vol 14 (1) ◽  
pp. 59-80 ◽  
Author(s):  
William O. Criminale ◽  
Leslie S. G. Kovasznay
Keyword(s):  
Electronic Computer ◽  
Wave Number ◽  
Harmonic Waves ◽  
Two Dimensional ◽  
Small Disturbance ◽  
Dimensional Theory ◽  
Initial Development ◽  
Vector Wave ◽  
Disturbance Waves ◽  
Amplification Rate

The classical theory of the instability of laminar flow predicts the growth (or decay) rate and phase velocity of two-dimensional small disturbance waves. In order to study the growth and dispersion of an originally localized spot-like disturbance, the initial disturbance is built up from all possible simple-harmonic waves. The propagation velocity and amplification rate for each vector wave-number then follows from the two-dimensional theory by Squire's generalization. The initial development can be solved explicitly by a power series in time, and the asymptotic behaviour is also predicted. For times between initial and final periods, exact numerical calculations have been made using an IBM 709 electronic computer. The role which localized disturbances can play in ultimate transition to turbulent motion is also indicated.

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