Merge branch 'SutherlandsLaw' of github.com:DanielDoehring/Trixi.jl i…

…nto SutherlandsLaw

src/equations/compressible_navier_stokes.jl

@@ -66,12 +66,12 @@ struct GradientVariablesEntropy end
 """
     dynamic_viscosity(u, equations)
 
-    Wrapper for the dynamic viscosity that calls
-    `dynamic_viscosity(u, equations.mu, equations)` which dispatches on the type of 
-    `equations.mu`. 
-    For constant `equations.mu`, i.e., `equations.mu` is of `Real`-type it is returned directly.
-    In the opposite case, `equations.mu` is assumed to be a function with arguments
-    `u` and `equations` and is called with these arguments.
+Wrapper for the dynamic viscosity that calls
+`dynamic_viscosity(u, equations.mu, equations)`, which dispatches on the type of 
+`equations.mu`. 
+For constant `equations.mu`, i.e., `equations.mu` is of `Real`-type it is returned directly.
+In all other cases, `equations.mu` is assumed to be a function with arguments
+`u` and `equations` and is called with these arguments.
 """
 dynamic_viscosity(u, equations) = dynamic_viscosity(u, equations.mu, equations)
 dynamic_viscosity(u, mu::Real, equations) = mu