General radial diffusion model for heterogeneous sorbents

1999 ◽  
Vol 18 (8) ◽  
pp. 1694-1700 ◽  
Author(s):  
Edward C. Heyse ◽  
Daniel J. Mika ◽  
Thomas P. De Venoge ◽  
David L. Coulliette ◽  
Audrey McGowin
Keyword(s):  
Diffusion Model ◽  
Radial Diffusion

scholarly journals Radial diffusion modeling with empirical lifetimes: comparison with CRRES observations

2005 ◽  
Vol 23 (4) ◽  
pp. 1467-1471 ◽  
Author(s):  
Y. Y. Shprits ◽  
R. M. Thorne ◽  
G. D. Reeves ◽  
R. Friedel
Keyword(s):  
Diffusion Model ◽  
Radiation Effects ◽  
Outer Zone ◽  
Recovery Phase ◽  
Decay Rates ◽  
Radial Diffusion ◽  
Main Phase ◽  
Relativistic Electrons ◽  
Storm Main Phase ◽  
Order Of Magnitude

Abstract. A time dependent radial diffusion model is used to quantify the competing effects of inward radial diffusion and losses on the distribution of the outer zone relativistic electrons. The rate of radial diffusion is parameterized by Kp with the loss time as an adjustable parameter. Comparison with HEEF data taken over 500 Combined Release and Radiation Effects Satellite (CRRES) orbits indicates that 1-MeV electron lifetimes near the peak of the outer zone are less than a day during the storm main phase and few days under less disturbed conditions. These values are comparable to independent estimates of the storm time loss rate due to scattering by EMIC waves and chorus emission, and also provide an acceptable representation of electron decay rates following the storm time injection. Although our radial diffusion model, with data derived lifetimes, is able to simulate many features of the variability of outer zone fluxes and predicts fluxes within one order of magnitude accuracy for most of the storms and L values, it fails to reproduce the magnitude of flux changes and the gradual build up of fluxes observed during the recovery phase of many storms. To address these differences future modeling should include an additional local acceleration source and also attempt to simulate the pronounced loss of electrons during the main phase of certain storms.

scholarly journals Reanalysis of relativistic radiation belt electron fluxes using CRRES satellite data, a radial diffusion model, and a Kalman filter

2007 ◽  
Vol 112 (A12) ◽  
pp. n/a-n/a ◽  
Author(s):  
Yuri Shprits ◽  
Dmitri Kondrashov ◽  
Yue Chen ◽  
Richard Thorne ◽  
Michael Ghil ◽  
...  
Keyword(s):  
Kalman Filter ◽  
Diffusion Model ◽  
Satellite Data ◽  
Radiation Belt ◽  
Radial Diffusion

scholarly journals Radial diffusion model for fragrance materials: prediction and validation

AIChE Journal ◽  
2021 ◽  
Author(s):  
Rafael N. Almeida ◽  
Alírio E. Rodrigues ◽  
Rubem M. F. Vargas ◽  
Eduardo Cassel
Keyword(s):  
Diffusion Model ◽  
Radial Diffusion ◽  
Fragrance Materials

scholarly journals Approximation of a radial diffusion model with a multiple-rate model for hetero-disperse particle mixtures

2008 ◽  
Vol 97 (1-2) ◽  
pp. 55-66 ◽  
Author(s):  
Arash Massoudieh ◽  
Daeyoung Ju ◽  
Thomas M. Young ◽  
Timothy R. Ginn
Keyword(s):  
Diffusion Model ◽  
Disperse Particle ◽  
Radial Diffusion ◽  
Rate Model

Rate Parameters for Methyl tert -Butyl Ether Biodegradation via a Radial Diffusion Model

2003 ◽  
Vol 129 (6) ◽  
pp. 565-570 ◽  
Author(s):  
Hakan Başağaoğlu ◽  
Esther E. Chung ◽  
Deepa Gandhi ◽  
Kate M. Scow ◽  
Benjamin J. McCoy ◽  
...  
Keyword(s):  
Diffusion Model ◽  
Radial Diffusion ◽  
Methyl Tert Butyl Ether ◽  
Butyl Ether ◽  
Tert Butyl
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