scholarly journals Bulk viscosity from Urca processes: npeμ matter in the neutrino-trapped regime

2021 ◽  
Vol 104 (10) ◽  
Author(s):  
Mark Alford ◽  
Arus Harutyunyan ◽  
Armen Sedrakian
Keyword(s):  
Bulk Viscosity

scholarly journals Bulk viscosity in kaon-condensed color–flavor-locked quark matter

2008 ◽  
Vol 35 (11) ◽  
pp. 115007 ◽  
Author(s):  
Mark G Alford ◽  
Matt Braby ◽  
Andreas Schmitt
Keyword(s):  
Bulk Viscosity ◽  
Quark Matter

Lubricant Removal, Degradation, and Recovery on Particulate Magnetic Recording Media

1992 ◽  
Vol 114 (1) ◽  
pp. 61-67 ◽  
Author(s):  
V. J. Novotny ◽  
T. E. Karis ◽  
N. W. Johnson
Keyword(s):  
Bulk Viscosity ◽  
Magnetic Recording ◽  
Photoelectron Spectroscopy ◽  
Removal Rate ◽  
Lateral Diffusion ◽  
Recording Media ◽  
Magnetic Recording Media ◽  
Removal Rates ◽  
Linear Chains ◽  
Mechanical Durability

Lubrication of particulate magnetic recording media improves their mechanical durability in sliding and flying by several orders of magnitude compared with unlubricated media. Lubricant removal, degradation, and recovery were studied using microslit scanning Fourier transform infrared spectroscopy and microspot scanning X-ray photoelectron spectroscopy. These techniques measure the total and surface lubricant amounts in the porous film, respectively. Lubricant dynamics were compared for two physisorbed polyperfluoroalkylether lubricants of similar molecular weight but different molecular structure—Y with a CF3 side group and Z with linear chains. The bulk viscosity of Y was about ten times higher than the viscosity of Z. In sliding, the lubricant removal rate of Y was significantly higher than that of Z while in flying the removal rates were reversed. Removal rates in sliding were orders of magnitude higher than those in flying. Effective lateral diffusion coefficients estimated from the rate of lubricant reflow back to the depleted tracks were close to inversely proportional to the bulk viscosity. During sliding and flying both lubricants degraded as evidenced by chemically altered lubricant detected on the surfaces after dissolution of undegraded lubricant.

Bulk viscosity and cosmological evolution

1996 ◽  
Vol 111 (12) ◽  
pp. 1481-1486
Author(s):  
A. Beesham
Keyword(s):  
Bulk Viscosity ◽  
Cosmological Evolution

Bulk viscosity and compressibility measurement using acoustic spectroscopy

2009 ◽  
Vol 130 (12) ◽  
pp. 124519 ◽  
Author(s):  
Andrei S. Dukhin ◽  
Philip J. Goetz
Keyword(s):  
Bulk Viscosity ◽  
Acoustic Spectroscopy
Sign in / Sign up

Export Citation Format

Share Document