V	arbitrary volume of suspension, $\left[{\mathrm{m}}^3\right]$
$V_f$	volume of fluid part in arbitrary volume V, $\left[{\mathrm{m}}^3\right]$
$V_p$	volume of dry particles in arbitrary volume V, $\left[{\mathrm{m}}^3\right]$
$V_M$	volume of mud in arbitrary volume V, $\left[{\mathrm{m}}^3\right]$
$V_s$	$=V_p+V_M$ volume of solid phase in arbitrary volume V, $\left[{\mathrm{m}}^3\right]$
$m_f$	mass of fluid in arbitrary volume V, [kg]
$m_p$	mass of dry particles in arbitrary volume V, [kg]
$m_M$	mass of mud in arbitrary volume V, [kg]
$m_s$	$=m_p+m_M$ mass of solid phase in arbitrary volume V, [kg]
m	$=m_f+m_p+m_M$ mass of arbitrary suspension volume V, [kg]
c	$=\frac{m_p}{m}$ mass concentration of particles, dimensionless
${\overline{\rho }}_f$	fluid density, $\left[\frac{\mathrm{kg}}{{\mathrm{m}}^3}\right]$
${\overline{\rho }}_p$	density of dry particles, $\left[\frac{\mathrm{kg}}{{\mathrm{m}}^3}\right]$
${\overline{\rho }}_M$	mud density, $\left[\frac{\mathrm{kg}}{{\mathrm{m}}^3}\right]$
${\varphi }_f$	volume fraction of fluid, dimensionless
${\varphi }_p$	volume fraction of dry particles, dimensionless
${\varphi }_M$	volume fraction of mud, dimensionless
${\varphi }_s$	$={\varphi }_p+{\varphi }_M$ volume fraction of solid phase, dimensionless
${\rho }_f$	=${\varphi }_f{\overline{\rho }}_f$ partial fluid density, $\left[\frac{\mathrm{kg}}{{\mathrm{m}}^3}\right]$
${\rho }_p$	$={\varphi }_p{\overline{\rho }}_p$ partial particle density, $\left[\frac{\mathrm{kg}}{{\mathrm{m}}^3}\right]$
${\rho }_M$	$={\varphi }_M{\overline{\rho }}_M$ partial mud density, $\left[\frac{\mathrm{kg}}{{\mathrm{m}}^3}\right]$
${\rho }_s$	$={\rho }_p+{\rho }_M$ partial density of solid phase, $\left[\frac{\mathrm{kg}}{{\mathrm{m}}^3}\right]$
$\rho$	$={\rho }_f+{\rho }_p+{\rho }_M$ total density $\left[\frac{\mathrm{kg}}{{\mathrm{m}}^3}\right]$
${\overline{\rho }}_s$	$=\frac{{\rho }_s}{{\varphi }_s}$, density of the solid phase, $\left[\frac{\mathrm{kg}}{{\mathrm{m}}^3}\right]$
$R_0$	$=\frac{{\overline{\rho }}_s}{{\overline{\rho }}_f}$, ratio of densities, dimensionless
g	gravitational acceleration, $980\left[\frac{\mathrm{cm}}{{\mathrm{s}}^2}\right]$
p	pressure, [Pa]
${\mathbf{v}}_f$	velocity of fluid phase, $\left[\frac{\mathrm{m}}{\mathrm{s}}\right]$
${\mathbf{v}}_s$	velocity of solid phase, $\left[\frac{\mathrm{m}}{\mathrm{s}}\right]$
$\mathbf{u}$	$={\mathbf{v}}_s-{\mathbf{v}}_f$ difference of velocities, $\left[\frac{\mathrm{m}}{\mathrm{s}}\right]$
$\mathbf{v}$	$={\varphi }_f{\mathbf{v}}_f+{\varphi }_s{\mathbf{v}}_s$ mean volume velocity, $\left[\frac{\mathrm{m}}{\mathrm{s}}\right]$
$\tilde{\mathbf{v}}$	$=(1-c){\mathbf{v}}_f+c{\mathbf{v}}_s$ mean mass velocity, $\left[\frac{\mathrm{m}}{\mathrm{s}}\right]$
$T_f$	viscous part of stress tensor of fluid phase, [Pa]
$T_s$	viscous part of stress tensor of solid phase, [Pa]
D	rate of strain tensor, $\left[{\mathrm{s}}^{-1}\right]$
$D_d$	deviatoric part of D, $\left[{\mathrm{s}}^{-1}\right]$
I	identity matrix, dimensionless