Current-driven Large Density Fluctuations of Vortices and Antivortices in the Corbino Disk

2005 ◽  
Author(s):  
S. Okuma
Keyword(s):  
Density Fluctuations ◽  
Large Density ◽  
Corbino Disk

Large-density fluctuations for the one-dimensional supercritical contact process

1989 ◽  
Vol 55 (3-4) ◽  
pp. 639-648 ◽  
Author(s):  
Antonio Galves ◽  
Fabio Martinelli ◽  
Enzo Olivieri
Keyword(s):  
Contact Process ◽  
Density Fluctuations ◽  
One Dimensional ◽  
Large Density ◽  
The One

Large vortex-density fluctuations induced by current in the Corbino-disk

2005 ◽  
Vol 426-431 ◽  
pp. 158-162 ◽  
Author(s):  
S. Okuma ◽  
S. Morishima ◽  
M. Kamada
Keyword(s):  
Density Fluctuations ◽  
Large Vortex ◽  
Vortex Density ◽  
Corbino Disk

Large density fluctuations in the martian ionosphere as observed by the Mars Express radar sounder

Icarus ◽  
2010 ◽  
Vol 206 (1) ◽  
pp. 83-94 ◽  
Author(s):  
D.A. Gurnett ◽  
D.D. Morgan ◽  
F. Duru ◽  
F. Akalin ◽  
J.D. Winningham ◽  
...  
Keyword(s):  
Density Fluctuations ◽  
Mars Express ◽  
Large Density ◽  
Martian Ionosphere ◽  
Radar Sounder

A NEW MODEL FOR TURBULENT FLOWS WITH LARGE DENSITY FLUCTUATIONS: APPLICATION TO LIQUID ATOMIZATION

2007 ◽  
Vol 17 (4) ◽  
pp. 315-345 ◽  
Author(s):  
Francois-Xavier Demoulin ◽  
Pierre-Arnaud Beau ◽  
Gregory Blokkeel ◽  
Arnaud Mura ◽  
R. Borghi
Keyword(s):  
Turbulent Flows ◽  
Density Fluctuations ◽  
New Model ◽  
Large Density ◽  
Liquid Atomization

scholarly journals Multiphase gas in the circumgalactic medium: relative role of tcool/tff and density fluctuations

2019 ◽  
Vol 488 (3) ◽  
pp. 3195-3210 ◽  
Author(s):  
Prakriti Pal Choudhury ◽  
Prateek Sharma ◽  
Eliot Quataert
Keyword(s):  
Small Amplitude ◽  
Free Fall ◽  
Density Fluctuations ◽  
Thermal Balance ◽  
Relative Role ◽  
Large Density ◽  
Density Perturbations ◽  
Circumgalactic Medium ◽  
Cold Gas

ABSTRACT We perform a suite of simulations with realistic gravity and thermal balance in shells to quantify the role of the ratio of cooling time to the free-fall time (tcool/tff) and the amplitude of density perturbations (δρ/ρ) in the production of multiphase gas in the circumgalactic medium (CGM). Previous idealized simulations, focusing on small amplitude perturbations in the intracluster medium (ICM), found that cold gas can condense out of the hot ICM in global thermal balance when the background tcool/tff ≲ 10. Recent observations suggest the presence of cold gas even when the background profiles have somewhat large values of tcool/tff. This partly motivates a better understanding of additional factors such as large density perturbations that can enhance the propensity for cooling and condensation even when the background tcool/tff is high. Such large density contrasts can be seeded by galaxy wakes or dense cosmological filaments. From our simulations, we introduce a condensation curve in the (δρ/ρ) – min(tcool/tff) space, which defines the threshold for condensation of multiphase gas in the CGM. We show that this condensation curve corresponds to (tcool/tff)blob ≲ 10 applied to the overdense blob instead of the background for which tcool/tff can be higher. We also study the modification in the condensation curve by varying entropy stratification. Steeper (positive) entropy gradients shift the condensation curve to higher amplitudes of perturbations (i.e. make condensation difficult). A constant entropy core, applicable to the CGM in smaller haloes, shows condensation over a larger range of radii as compared to the steeper entropy profiles in the ICM.

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