scholarly journals LINEAR THEORY OF UNMAGNETIZED PLASMA FILLED DIELECTRIC CHERENKOV MASER

1997 ◽  
Vol 46 (2) ◽  
pp. 324
Author(s):  
WU JIAN-QIANG ◽  
LIU SHENG-GANG ◽  
MO YUAN-LONG
Keyword(s):  
Linear Theory ◽  
Dielectric Cherenkov Maser ◽  
Unmagnetized Plasma

On the linear theory of waves in media with periodic structures

1991 ◽  
Vol 161 (9) ◽  
pp. 201-209 ◽  
Author(s):  
Polina S. Landa ◽  
V.F. Marchenko
Keyword(s):  
Linear Theory ◽  
Periodic Structures

scholarly journals Numerical Study on an Interface Compression Method for the Volume of Fluid Approach

Fluids ◽  
2021 ◽  
Vol 6 (2) ◽  
pp. 80
Author(s):  
Yuria Okagaki ◽  
Taisuke Yonomoto ◽  
Masahiro Ishigaki ◽  
Yoshiyasu Hirose
Keyword(s):  
Linear Theory ◽  
Volume Fraction ◽  
Numerical Study ◽  
Volume Of Fluid ◽  
Interfacial Wave ◽  
Validation Process ◽  
Two Phase ◽  
Numerical Diffusion ◽  
Mesh Resolution ◽  
Water Reactors

Many thermohydraulic issues about the safety of light water reactors are related to complicated two-phase flow phenomena. In these phenomena, computational fluid dynamics (CFD) analysis using the volume of fluid (VOF) method causes numerical diffusion generated by the first-order upwind scheme used in the convection term of the volume fraction equation. Thus, in this study, we focused on an interface compression (IC) method for such a VOF approach; this technique prevents numerical diffusion issues and maintains boundedness and conservation with negative diffusion. First, on a sufficiently high mesh resolution and without the IC method, the validation process was considered by comparing the amplitude growth of the interfacial wave between a two-dimensional gas sheet and a quiescent liquid using the linear theory. The disturbance growth rates were consistent with the linear theory, and the validation process was considered appropriate. Then, this validation process confirmed the effects of the IC method on numerical diffusion, and we derived the optimum value of the IC coefficient, which is the parameter that controls the numerical diffusion.

scholarly journals Filament formation via the instability of a stretching viscous sheet: Physical mechanism, linear theory, and fiber applications

2019 ◽  
Vol 4 (7) ◽  
Author(s):  
Bingrui Xu ◽  
Minhao Li ◽  
Feng Wang ◽  
Steven G. Johnson ◽  
Yoel Fink ◽  
...  
Keyword(s):  
Linear Theory ◽  
Physical Mechanism ◽  
Filament Formation
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