diff --git a/docs/source_docs/user_guide/inputs/boundary_conditions.rst b/docs/source_docs/user_guide/inputs/boundary_conditions.rst
index 181a8e1f6d450b4d6e0fb75c7c0bcbd49c5dfc85..a563fe0ea0138f46220960444c0039b1e3840cee 100644
--- a/docs/source_docs/user_guide/inputs/boundary_conditions.rst
+++ b/docs/source_docs/user_guide/inputs/boundary_conditions.rst
@@ -59,8 +59,6 @@ using the prefix ``bc.[region_name].[fluid_name]``:
 +------------------------+------------------------------------------------------------------------+-------------+-----------+
 |                        | Description                                                            |   Type      | Default   |
 +========================+========================================================================+=============+===========+
-| volfrac                | Volume fraction [required if bc type is ``mi``]                        | Real        | None      |
-+------------------------+------------------------------------------------------------------------+-------------+-----------+
 | density                | Fluid density [required if bc type is ``mi`` or ``pi``]                | Real        | None      |
 +------------------------+------------------------------------------------------------------------+-------------+-----------+
 | pressure               | Fluid pressure [required if bc type is ``po' or ``pi``]                | Real        | None      |
@@ -91,7 +89,6 @@ Below is an example for specifying boundary conditions for fluid (``fluid``).
    bc.regions = inflow outflow
 
    bc.inflow = mi
-   bc.inflow.fluid.volfrac     =  1.0
    bc.inflow.fluid.density     =  1.0
    bc.inflow.fluid.velocity    =  0.015  0.0  0.0
    bc.inflow.fluid.temperature =  300
@@ -112,7 +109,6 @@ Below is an example for specifying a normal inflow velocity magnitude for a regi
 
    bc.eb-flow = eb
 
-   bc.eb-flow.my_fluid.volfrac  = 1.0
    bc.eb-flow.my_fluid.velocity = 0.1
 
 Below is an example where only specific cells are imposed a velocity inflow in the x-direction.
@@ -126,7 +122,6 @@ Below is an example where only specific cells are imposed a velocity inflow in t
    bc.eb-flow.eb.normal_tol = 3.0
    bc.eb-flow.eb.normal =  0.9848  0.0000  0.1736  # 10 deg
 
-   bc.eb-flow.my_fluid.volfrac  = 1.0
    bc.eb-flow.my_fluid.velocity = 0.1  0.0  0.0
 
 
diff --git a/docs/source_docs/user_guide/inputs/chemical_reactions.rst b/docs/source_docs/user_guide/inputs/chemical_reactions.rst
index f90a95eb34c169409c897b8b4b4fc8b424c19e4c..6e7cac39a49253d89991b5c117ec2387b4f9ab0a 100644
--- a/docs/source_docs/user_guide/inputs/chemical_reactions.rst
+++ b/docs/source_docs/user_guide/inputs/chemical_reactions.rst
@@ -348,7 +348,6 @@ to chemical reactions.
   bc.regions = inflow  outflow
 
   bc.inflow = mi
-  bc.inflow.fluid.volfrac       = 1.0
   bc.inflow.fluid.velocity      = 0.015  0.0  0.0
   bc.inflow.fluid.temperature   = 1273.
   bc.inflow.fluid.species.CH4   = 0.1
diff --git a/docs/source_docs/user_guide/inputs/fluid_model.rst b/docs/source_docs/user_guide/inputs/fluid_model.rst
index 76294f7ae64fa819e6f6c1d50cfff5683a1ea572..45441ae4b5144aadcac09e6f1f8253e2b225f02e 100644
--- a/docs/source_docs/user_guide/inputs/fluid_model.rst
+++ b/docs/source_docs/user_guide/inputs/fluid_model.rst
@@ -98,7 +98,7 @@ The following inputs are defined using the prefix ``[fluid_name].viscosity.molec
 Eddy viscosity
 ^^^^^^^^^^^^^^
 
-The following inputs are defined using the prefix ``[fluid_name].viscosity.eddy``:
+The following inputs are defined using the prefix ``fluid.viscosity.eddy``:
 
 
 +-----------------------------+----------------------------------------------------------------+--------+----------+
@@ -126,7 +126,7 @@ The following inputs are defined using the prefix ``[fluid_name].viscosity.eddy`
 Suspension viscosity
 ^^^^^^^^^^^^^^^^^^^^
 
-The following inputs are defined using the prefix ``[fluid_name].viscosity.suspension``:
+The following inputs are defined using the prefix ``fluid.viscosity.suspension``:
 
 +-----------------------+----------------------------------------------------------------+--------+----------+
 |                       | Description                                                    |  Type  | Default  |
@@ -405,7 +405,6 @@ are not solved.
    bc.regions = inlet  outlet
 
    bc.inlet = mi
-   bc.inlet.fluid0.volfrac  =  1.0
    bc.inlet.fluid0.density  =  1.0
 
    bc.inlet.fluid0.velocity =  1.0e-8  0.0  0.0
@@ -462,7 +461,6 @@ pressure when evaluating the equation of state.
    bc.regions = inlet  outlet
 
    bc.inlet = mi
-   bc.inlet.fluid0.volfrac  =  1.0
 
    bc.inlet.fluid0.velocity =  1.0e-8  0.0  0.0
 
@@ -531,7 +529,6 @@ thermodynamic pressure for the system.
    bc.regions = inlet  outlet
 
    bc.inlet = mi
-   bc.inlet.fluid0.volfrac  =  1.0
 
    bc.inlet.fluid0.velocity =  1.0e-8  0.0  0.0
 
diff --git a/docs/source_docs/user_guide/inputs/species.rst b/docs/source_docs/user_guide/inputs/species.rst
index 0089db0488f5fed879b65a7ba262061f9eb17fdb..b9adddaa13b365c0377bd8a389dc6b4c95735ca7 100644
--- a/docs/source_docs/user_guide/inputs/species.rst
+++ b/docs/source_docs/user_guide/inputs/species.rst
@@ -271,7 +271,6 @@ local species concentrations do not affect the fluid.
    bc.regions = inlet  outlet
 
    bc.inlet = mi
-   bc.inlet.fluid.volfrac  =  1.0
    bc.inlet.fluid.density  =  1.0
 
    bc.inlet.fluid.velocity =  1.0e-8  0.0  0.0
@@ -370,7 +369,6 @@ outflow boundary condition pressure which is set here to 1 atmosphere.
    bc.regions = inlet  outlet
 
    bc.inlet = mi
-   bc.inlet.fluid.volfrac  =  1.0
 
    bc.inlet.fluid.velocity =  1.0e-8  0.0  0.0