Diffusion Reaction Interaction for a Pair of Spheres - ETD ...
Diffusion Reaction Interaction for a Pair of Spheres - ETD ...
Diffusion Reaction Interaction for a Pair of Spheres - ETD ...
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3.12 Constant concentration 0 c c contour curves <strong>for</strong> two diffusioncontrolled<br />
sinks. Sphere 2 the smaller sink ( 2 1 = a ) is shown at the<br />
center. Only the lower portion <strong>of</strong> he larger sink 1 ( 1 10 = a ) is shown<br />
at the top. The center-to-center separation distance<br />
−1<br />
d( a1<br />
+ a2<br />
) = 1.<br />
01 is taken near closest approach contact <strong>for</strong><br />
maximum recovery <strong>of</strong> R1 from the minimum………...……………... 86<br />
4.1 Dimensionless consumption rate <strong>of</strong> the diffusion-limited sink R1<br />
−1<br />
versus the dimensionless intersphere distance d( a1<br />
+ a2<br />
) between<br />
the sink and source <strong>for</strong> a sink source radius ratio ( 1 / 2 ) a a = γ <strong>of</strong> 0.10.<br />
The different curves refer to the dimensionless sphere 2 surface<br />
strength α ( = c2<br />
/ c0<br />
−1)<br />
<strong>of</strong> –1, -0.5, 0, 0.2, 0.4, 0.6, and 0.8 assigned<br />
from the lowest curve in ascending order…………………...……….. 100<br />
4.2 Dimensionless consumption rate <strong>of</strong> the diffusion-limited sink R1<br />
−1<br />
versus the dimensionless intersphere distance d( a1<br />
+ a2<br />
) between<br />
the sink and source <strong>for</strong> a sink source radius ratio ( 1 / 2 ) a a = γ <strong>of</strong> 1.<br />
The different curves refer to the dimensionless sphere 2 surface<br />
strength α ( = c2<br />
/ c0<br />
−1)<br />
<strong>of</strong> –1, -0.5, 0, 0.2, 0.4, 0.6, and 0.8 assigned<br />
from the lowest curve in ascending order……………………………. 101<br />
4.3 Dimensionless consumption rate <strong>of</strong> the diffusion-limited sink R1<br />
−1<br />
versus the dimensionless intersphere distance d( a1<br />
+ a2<br />
) between<br />
the sink and source <strong>for</strong> a sink source radius ratio ( 1 / 2 ) a a = γ <strong>of</strong> 10.<br />
The different curves refer to the dimensionless sphere 2 surface<br />
strength α ( = c2<br />
/ c0<br />
−1)<br />
<strong>of</strong> –1, -0.5, 0, 0.2, 0.4, 0.6, and 0.8 assigned<br />
from the lowest curve in ascending order…………………………..... 102<br />
5.1 <strong>Reaction</strong> probability Pint<br />
<strong>for</strong> a first order penetrable sink and a zeroth<br />
order source versus the dimensionless center to center distance<br />
d /( a1<br />
+ a2<br />
) between the source and sink, <strong>for</strong> a sink to source radius<br />
ratio ( 1 / 2 ) a a = γ <strong>of</strong> 0.1, extracellular to internal sink diffusivity ratio<br />
( / int ) D D = ε <strong>of</strong> 0.1 and sink Thiele Modulus ) / ( T a1<br />
kint<br />
Dint<br />
= φ <strong>of</strong><br />
0.1, 0.5, 1, 5, 10 and 50. The lower solid lines are the exact reaction<br />
probability, equation (5.41), <strong>for</strong> an internally reactive sink, and the<br />
dashed lines refers to the approximate, sink surface reaction<br />
probability Psur<br />
, equation (5.45), with an effective inverse<br />
−1<br />
dimensionless reaction rate coefficient λ1eff ( = ε /( φT<br />
coth φT<br />
−1)<br />
) <strong>of</strong><br />
30, 1.22, 0.320, 0.025, 0.011, and 0.002……………………………... 128<br />
ix