Dedicated NMR sensor to analyze relaxation and diffusion in liquids and its application to characterize lubricants

2021 ◽  
Author(s):  
T. Rudszuck ◽  
K. Zick ◽  
D. Groß ◽  
H. Nirschl ◽  
G. Guthausen
Keyword(s):  
Diffusion In Liquids ◽  
And Diffusion

Solutions of Electrolytes and Diffusion in Liquids

1957 ◽  
Vol 8 (1) ◽  
pp. 37-54 ◽  
Author(s):  
R A Robinson ◽  
R H Stokes
Keyword(s):  
Solutions Of Electrolytes ◽  
Diffusion In Liquids ◽  
And Diffusion

Particle Capture Mechanisms in Gases and Liquids: An Analysis of Operative Mechanisms in Membrane/Fibrous Filters

1989 ◽  
Vol 32 (4) ◽  
pp. 43-51
Author(s):  
Donald Grant ◽  
Benjamin Liu ◽  
Wayne Fisher ◽  
R. Bowling
Keyword(s):  
Relative Effectiveness ◽  
Particle Capture ◽  
Membrane Filters ◽  
Gas Streams ◽  
Media System ◽  
Fibrous Filters ◽  
Diffusion In Liquids ◽  
Low Levels ◽  
Chemical Conditions ◽  
And Diffusion

Membrane filters are capable of reducing particles in fluids to very low levels through the action of several capture mechanisms. However, the effectiveness of these mechanisms at removing particles is influenced by the properties of the fluid undergoing filtration. This article reviews the theories of particle capture mechanisms and discusses their relative effectiveness in various fluid types. Theory indicates that membrane filters remove essentially all particles from gas streams by interception and diffusion. In liquids, the operative particle capture mechanisms depend upon the physical chemistry of the particle-fluid-filter media system. Under favorable chemical conditions, the operative capture mechanisms are the same as in gases with essentially all particles removed. However, under unfavorable chemical conditions, only particle sieving occurs, and capture is greatly reduced. In addition, captured particles are less tightly held in liquids and shearing forces are larger, hence particle reentrainment is more likely.

Models Relating Molecular Reactivity and Diffusion in Liquids

1956 ◽  
Vol 78 (21) ◽  
pp. 5486-5490 ◽  
Author(s):  
Richard M. Noyes
Keyword(s):  
Molecular Reactivity ◽  
Diffusion In Liquids ◽  
And Diffusion

scholarly journals Inherent-structure dynamics and diffusion in liquids

2001 ◽  
Vol 64 (3) ◽  
Author(s):  
T. Keyes ◽  
J. Chowdhary
Keyword(s):  
Structure Dynamics ◽  
Inherent Structure ◽  
Diffusion In Liquids ◽  
And Diffusion

Meridional Circulation, Turbulence, and Diffusion Processes in Stars

1976 ◽  
Vol 32 ◽  
pp. 109-116 ◽  
Author(s):  
S. Vauclair
Keyword(s):  
Convection Zone ◽  
Diffusion Processes ◽  
Meridional Circulation ◽  
Diffusion Time ◽  
Work In Progress ◽  
First Results ◽  
Stellar Envelopes ◽  
And Diffusion ◽  
Turbulence And Diffusion ◽  
Hr Diagram

This paper gives the first results of a work in progress, in collaboration with G. Michaud and G. Vauclair. It is a first attempt to compute the effects of meridional circulation and turbulence on diffusion processes in stellar envelopes. Computations have been made for a 2 Mʘstar, which lies in the Am - δ Scuti region of the HR diagram.Let us recall that in Am stars diffusion cannot occur between the two outer convection zones, contrary to what was assumed by Watson (1970, 1971) and Smith (1971), since they are linked by overshooting (Latour, 1972; Toomre et al., 1975). But diffusion may occur at the bottom of the second convection zone. According to Vauclair et al. (1974), the second convection zone, due to He II ionization, disappears after a time equal to the helium diffusion time, and then diffusion may happen at the bottom of the first convection zone, so that the arguments by Watson and Smith are preserved.

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