Journal Article•
Linear and Nonlinear Analysis of Density-Wave Instability Phenomena
About: This article is published in International Journal of Heat and Technology.The article was published on 2000-01-01 and is currently open access. It has received 44 citations till now. The article focuses on the topics: Instability & Density wave theory.
Citations
More filters
TL;DR: An updated review of two-phase flow instabilities including experimental and analytical results regarding density-wave and pressure-drop oscillations, as well as Ledinegg excursions, is presented in this article.
292 citations
Cites background or methods from "Linear and Nonlinear Analysis of De..."
...It consists on integrating the governing equations over the domain of interest to substitute the continuous dependence of parameters by an average dependence [192,193]....
[...]
...Several numerical techniques such FDM, FVM, FEM can be used [192,194,195]....
[...]
...[192] a lumped parameter model is used to simulate a boiling channel and the Ledinegg stability limit is predicted in a NPch vs....
[...]
TL;DR: A systematic overview of all key two-phase instabilities focusing on the fundamental mechanisms leading to their occurrence is provided, with emphasis on how these mechanisms may change depending on whether flow may be classified as macro- or micro-channel.
74 citations
TL;DR: In this article, the authors investigated the influence of the MOD3.3 code on the two-phase flow instability in the RELAP5/MOD3.5 code and concluded that the influence on stability of the bypass area is examined.
48 citations
TL;DR: In this paper, a set of dimensionless numbers is proposed to predict the threshold of instabilities in a long circular channel with uniform heating and no singular pressure drop, and linear stability maps generated by a previously developed in-house code, making use of balance equations in dimensionless form, are compared with the results obtained by computations performed in dimensional terms.
48 citations
TL;DR: In this article, the stability of a simple heated channel containing fluids at supercritical pressure with an external imposed pressure drop was analyzed using three different analysis tools, including a system code and in-house linear and transient analysis programs, to evaluate stability thresholds at different channel throttling conditions and orientations.
46 citations
References
More filters
Book•
28 Mar 1988TL;DR: In this article, a comprehensive presentation of numerical methods suitable for the analysis of various heat transverse and fluid flow problems that occur in research, practice, and university instruction is given.
Abstract: A comprehensive presentation is given of virtually all numerical methods that are suitable for the analysis of the various heat transverse and fluid flow problems that occur in research, practice, and university instruction. After reviewing basic methodologies, the following topics are covered: finite difference and finite element methods for parabolic, elliptic, and hyperbolic systems; a comparative appraisal of finite difference versus finite element methods; integral and integrodifferential systems; perturbation methods; Monte Carlo methods; finite analytic methods; moving boundary problems; inverse problems; graphical display methods; grid generation methods; and programing methods for supercomputers.
718 citations
TL;DR: In this paper, the authors identify the causes and mechanisms of thermal-hydrodynamic instabilities in boiling flow in a water-cooled reactor, an evaporator, or an electronic cooling system.
708 citations
TL;DR: In this paper, the hydrodynamic instabilities of two-phase flow are classified into at least eight types: the static or the Ledinegg instability, the dynamic or the density wave instability.
Abstract: An analysis shows that hydrodynamic instabilities of two-phase flow are classified into at least eight types. Three of them are roughly classified into the static or the Ledinegg instability, and other five of them into the dynamic or the density wave instability. Two typical types of instabilities are observed in our experiment, in each type different pressure drop term: gravitational or frictional pressure drop of two-phase flow is found to be the governing term. Classification method of instabilities and its applications are presented.
220 citations
"Linear and Nonlinear Analysis of De..." refers background in this paper
...In addition, previous studies [11] identified various types of both Ledinegg and density-wave instabilities, the latter characterised by different characteristic oscillation periods....
[...]
150 citations