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m (New page: Given and Stell \cite{JCP_1992_97_04573,PA_1994_209_0495} provided {\bf exact} OZ equations for two-phase random media based on the original work of Madden and Glandt \cite{JSP_1988_51_053...)
 
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Given and Stell \cite{JCP_1992_97_04573,PA_1994_209_0495} provided {\bf exact} OZ equations for two-phase random media
Given and Stell (Refs 1 and 2) provided '''exact''' OZ equations for two-phase random media
based on the original work of Madden and Glandt \cite{JSP_1988_51_0537_nolotengoSpringer,JCP_1992_96_05422}.\\
based on the original work of Madden and Glandt (Refs 3 and 4).
For a two-species system, for the $(s+1)$ replicated system one has (see Eq.s 2.7 --2.11 \cite{PA_1994_209_0495}):\\
For a two-species system, for the <math>(s+1)</math> replicated system one has (see Eq.s 2.7 --2.11 Ref. 2):
\begin{equation}
 
h_{mm} = c_{mm} + \rho_m c_{mm} \otimes h_{mm} + s\rho_f c_{mf}  \otimes h_{mf}
:<math>h_{mm} = c_{mm} + \rho_m c_{mm} \otimes h_{mm} + s\rho_f c_{mf}  \otimes h_{mf}</math>
\end{equation}
 
\begin{equation}
 
h_{mf} = c_{mf} + \rho_m c_{mm} \otimes h_{mf} + \rho_f  c_{mf}  \otimes h_{ff} + (s-1) \rho_f c_{mf}  \otimes h_{12}
:<math>h_{mf} = c_{mf} + \rho_m c_{mm} \otimes h_{mf} + \rho_f  c_{mf}  \otimes h_{ff} + (s-1) \rho_f c_{mf}  \otimes h_{12}</math>
\end{equation}
 
\begin{equation}
 
h_{fm} = c_{fm} + \rho_m c_{fm} \otimes h_{mm} + \rho_f  c_{ff}  \otimes h_{fm} + (s-1) \rho_f c_{12}  \otimes h_{fm}
:<math>h_{fm} = c_{fm} + \rho_m c_{fm} \otimes h_{mm} + \rho_f  c_{ff}  \otimes h_{fm} + (s-1) \rho_f c_{12}  \otimes h_{fm}</math>
\end{equation}
 
\begin{equation}
 
h_{ff} = c_{ff} + \rho_m c_{fm} \otimes h_{mf} + \rho_f  c_{ff}  \otimes h_{ff} + (s-1) \rho_f c_{12}  \otimes h_{12}
:<math>h_{ff} = c_{ff} + \rho_m c_{fm} \otimes h_{mf} + \rho_f  c_{ff}  \otimes h_{ff} + (s-1) \rho_f c_{12}  \otimes h_{12}</math>
\end{equation}
 
\begin{equation}
 
h_{12} = c_{12} + \rho_m c_{fm} \otimes h_{mf} + \rho_f  c_{ff}  \otimes h_{12} +  
:<math>h_{12} = c_{12} + \rho_m c_{fm} \otimes h_{mf} + \rho_f  c_{ff}  \otimes h_{12} + \rho_f  c_{12}  \otimes h_{ff} + (s-2) \rho_f c_{12} \otimes h_{12} </math>
\rho_f  c_{12}  \otimes h_{ff} + (s-2) \rho_f c_{12}   \otimes h_{12}
 
\end{equation}
 
In the limit of $s \rightarrow 0$ these equations from the ROZ equations (see Eq.s 2.12 --2.16 \cite{PA_1994_209_0495}):\\
In the limit of <math>s \rightarrow 0</math> these equations from the ROZ equations (see Eq.s 2.12 --2.16 Ref. 2):
\begin{equation}
 
h_{mm} = c_{mm} + \rho_m c_{mm} \otimes h_{mm}
:<math>h_{mm} = c_{mm} + \rho_m c_{mm} \otimes h_{mm}</math>
\end{equation}
 
\begin{equation}
 
h_{mf} = c_{mf} + \rho_m c_{mm} \otimes h_{mf} + \rho_f  c_{mf}  \otimes h_{ff} - \rho_f c_{mf}  \otimes h_{12}
:<math>h_{mf} = c_{mf} + \rho_m c_{mm} \otimes h_{mf} + \rho_f  c_{mf}  \otimes h_{ff} - \rho_f c_{mf}  \otimes h_{12}</math>
\end{equation}
 
\begin{equation}
 
h_{fm} = c_{fm} + \rho_m c_{fm} \otimes h_{mm} + \rho_f  c_{ff}  \otimes h_{fm} - \rho_f c_{12}  \otimes h_{fm}
:<math>h_{fm} = c_{fm} + \rho_m c_{fm} \otimes h_{mm} + \rho_f  c_{ff}  \otimes h_{fm} - \rho_f c_{12}  \otimes h_{fm}</math>
\end{equation}
 
\begin{equation}
 
h_{ff} = c_{ff} + \rho_m c_{fm} \otimes h_{mf} + \rho_f  c_{ff}  \otimes h_{ff} - \rho_f c_{12}  \otimes h_{12}
:<math>h_{ff} = c_{ff} + \rho_m c_{fm} \otimes h_{mf} + \rho_f  c_{ff}  \otimes h_{ff} - \rho_f c_{12}  \otimes h_{12}</math>
\end{equation}
 
\begin{equation}
 
h_{12} = c_{12} + \rho_m c_{fm} \otimes h_{mf} + \rho_f  c_{ff}  \otimes h_{12} +  
:<math>h_{12} = c_{12} + \rho_m c_{fm} \otimes h_{mf} + \rho_f  c_{ff}  \otimes h_{12} + \rho_f  c_{12}  \otimes h_{ff} -2 \rho_f c_{12}  \otimes h_{12}</math>
\rho_f  c_{12}  \otimes h_{ff} -2 \rho_f c_{12}  \otimes h_{12}
 
\end{equation}
When written in the `percolation terminology'
When written in the `percolation terminology'
where $c$ terms `{\it connected}' and $b$ `{\it blocking}' are adapted from the
where <math>c</math> terms ''connected'' and <math>b</math> ''blocking'' are adapted from the
language of percolation theory.
language of percolation theory.
\begin{equation}
 
h_{mm} = c_{mm} + \rho_m c_{mm} \otimes h_{mm}
:<math>h_{mm} = c_{mm} + \rho_m c_{mm} \otimes h_{mm}</math>
\end{equation}
 
\begin{equation}
:<math>h_{fm} = c_{fm} + \rho_m c_{fm} \otimes h_{mm} + \rho_f c_c \otimes h_{fm}</math>
h_{fm} = c_{fm} + \rho_m c_{fm} \otimes h_{mm} + \rho_f c_c \otimes h_{fm}
 
\end{equation}
:<math>h_{ff} = c_{ff} + \rho_m c_{fm} \otimes h_{mf} +  \rho_f c_c \otimes h_{ff} + \rho_f c_b \otimes h_c</math>
\begin{equation}
 
h_{ff} = c_{ff} + \rho_m c_{fm} \otimes h_{mf} +  \rho_f c_c \otimes h_{ff} + \rho_f c_b \otimes h_c
:<math>h_c = c_c + \rho_f c_c \otimes h_c</math>
\end{equation}
 
\begin{equation}
h_c = c_c + \rho_f c_c \otimes h_c
\end{equation}
where the direct correlation function is split into
where the direct correlation function is split into
\begin{equation}
 
c_{ff}(12) = c_c (12) + c_b (12)
:<math>\left.c_{ff}(12)\right. = c_c (12) + c_b (12)</math>
\end{equation}
and the total correlation function is also split into
and the total correlation function is also split into
\begin{equation}
:<math>\left.h_{ff}(12)\right.= h_c (12) + h_b(12)</math>
h_{ff}(12)= h_c (12) + h_b(12)
 
\end{equation}
where <math>m</math> denotes the matrix
where $m$ denotes the matrix
and <math>f</math> denotes the fluid.
and $f$ denotes the fluid.
The blocking function <math>h_b(x)</math> accounts for correlations between a pair of  
The blocking function $h_b(x)$ accounts for correlations between a pair of  
fluid particles ``blocked" or separated from each other by matrix particles.
fluid particles ``blocked" or separated from each other by matrix particles.\\
IMPORTANT NOTE: Unlike an equilibrium mixture, there is only one convolution
IMPORTANT NOTE: Unlike an equilibrium mixture, there is only one convolution
integral for $h_{mm}$ because the structure of the medium is
integral for <math>h_{mm}</math> because the structure of the medium is
unaffected by the presence of fluid particles.\\
unaffected by the presence of fluid particles.
Note: $C_{ff}$ (Madden and Glandt) $=h_c$ (Given and Stell)\\
 
Note: fluid: $f$ (Madden and Glandt), `1'  (Given and Stell)\\
*Note: <math>C_{ff}</math> (Madden and Glandt) <math>=h_c</math> (Given and Stell)
Note: matrix: $m$ (Madden and Glandt), `0'  (Given and Stell)\\
*Note: fluid: <math>f</math> (Madden and Glandt), `1'  (Given and Stell)
*Note: matrix: <math>m</math> (Madden and Glandt), `0'  (Given and Stell)
 
At very low matrix porosities, i.e. very high densities of matrix particles,
At very low matrix porosities, i.e. very high densities of matrix particles,
the volume accessible to fluid particles is divided into small cavities, each
the volume accessible to fluid particles is divided into small cavities, each
totally surrounded by a matrix. In this limit, the function $h_c (x)$
totally surrounded by a matrix. In this limit, the function <math>h_c (x)</math>
describes correlations between fluid particles in the same cavity and the  
describes correlations between fluid particles in the same cavity and the  
function $h_b(x)$ describes correlations between particles in different cavities.
function <math>h_b(x)</math> describes correlations between particles in different cavities.
 
==References==
#[JCP_1992_97_04573]
#[PA_1994_209_0495]
#[JSP_1988_51_0537_nolotengoSpringer]
#[JCP_1992_96_05422]

Revision as of 16:45, 21 February 2007

Given and Stell (Refs 1 and 2) provided exact OZ equations for two-phase random media based on the original work of Madden and Glandt (Refs 3 and 4). For a two-species system, for the (s+1) replicated system one has (see Eq.s 2.7 --2.11 Ref. 2):

hmm=cmm+ρmcmm⊗hmm+sρfcmf⊗hmf


hmf=cmf+ρmcmm⊗hmf+ρfcmf⊗hff+(s−1)ρfcmf⊗h12


hfm=cfm+ρmcfm⊗hmm+ρfcff⊗hfm+(s−1)ρfc12⊗hfm


hff=cff+ρmcfm⊗hmf+ρfcff⊗hff+(s−1)ρfc12⊗h12


h12=c12+ρmcfm⊗hmf+ρfcff⊗h12+ρfc12⊗hff+(s−2)ρfc12⊗h12


In the limit of s→0 these equations from the ROZ equations (see Eq.s 2.12 --2.16 Ref. 2):

hmm=cmm+ρmcmm⊗hmm


hmf=cmf+ρmcmm⊗hmf+ρfcmf⊗hff−ρfcmf⊗h12


hfm=cfm+ρmcfm⊗hmm+ρfcff⊗hfm−ρfc12⊗hfm


hff=cff+ρmcfm⊗hmf+ρfcff⊗hff−ρfc12⊗h12


h12=c12+ρmcfm⊗hmf+ρfcff⊗h12+ρfc12⊗hff−2ρfc12⊗h12

When written in the `percolation terminology' where c terms connected and b blocking are adapted from the language of percolation theory.

hmm=cmm+ρmcmm⊗hmm
hfm=cfm+ρmcfm⊗hmm+ρfcc⊗hfm
hff=cff+ρmcfm⊗hmf+ρfcc⊗hff+ρfcb⊗hc
hc=cc+ρfcc⊗hc

where the direct correlation function is split into

cff(12)=cc(12)+cb(12)

and the total correlation function is also split into

hff(12)=hc(12)+hb(12)

where m denotes the matrix and f denotes the fluid. The blocking function hb(x) accounts for correlations between a pair of fluid particles ``blocked" or separated from each other by matrix particles. IMPORTANT NOTE: Unlike an equilibrium mixture, there is only one convolution integral for hmm because the structure of the medium is unaffected by the presence of fluid particles.

  • Note: Cff (Madden and Glandt) =hc (Given and Stell)
  • Note: fluid: f (Madden and Glandt), `1' (Given and Stell)
  • Note: matrix: m (Madden and Glandt), `0' (Given and Stell)

At very low matrix porosities, i.e. very high densities of matrix particles, the volume accessible to fluid particles is divided into small cavities, each totally surrounded by a matrix. In this limit, the function hc(x) describes correlations between fluid particles in the same cavity and the function hb(x) describes correlations between particles in different cavities.

References

  1. [JCP_1992_97_04573]
  2. [PA_1994_209_0495]
  3. [JSP_1988_51_0537_nolotengoSpringer]
  4. [JCP_1992_96_05422]
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