C

$u_{\text{w}}=u_{\text{o}}$

$u_{\text{w}}>u_{\text{o}}$

$u_{\text{w}}<u_{\text{o}}$

C_w

1

$\frac{1}{\frac{B_{\text{w}}+B_i}{B_{\text{w}}}\left[1+\frac{B_{\text{i}}}{B_{\text{w}}}{\left(1-\frac{{\varphi }_{\text{o}}}{{\varphi }_{\text{w}}}\cdot \frac{S_{\text{w}}}{S_{\text{o}}}\right)}^2\right]}$

$\frac{1}{1-\frac{\left(B_{\text{o}}+B_{\text{i}}\right)B_{\text{i}}}{B_{\text{w}}^2}\cdot \frac{{\mu }_{\text{o}}}{{\mu }_{\text{w}}}\cdot \frac{{\varphi }_{\text{o}}}{{\varphi }_{\text{w}}}\cdot {\left(\frac{S_{\text{w}}}{S_{\text{o}}}-\frac{{\varphi }_{\text{w}}}{{\varphi }_{\text{o}}}\right)}^2}$

C_o

1

$\frac{1}{1-\frac{B_{\text{i}}\left(B_{\text{w}}+B_{\text{i}}\right)}{B_{\text{o}}{}^2}\cdot \frac{{\mu }_{\text{w}}}{{\mu }_{\text{o}}}\cdot \frac{{\varphi }_{\text{w}}}{{\varphi }_{\text{o}}}\cdot {\left(\frac{S_{\text{o}}}{S_{\text{w}}}-\frac{{\varphi }_{\text{o}}}{{\varphi }_{\text{w}}}\right)}^2}$

$\frac{1}{\frac{B_{\text{o}}+B_{\text{i}}}{B_{\text{o}}}\left[1+\frac{B_{\text{i}}}{B_{\text{o}}}{\left(1-\frac{{\varphi }_{\text{w}}}{{\varphi }_{\text{o}}}\cdot \frac{S_{\text{o}}}{S_{\text{w}}}\right)}^2\right]}$