diff --git a/src/parameters.jl b/src/parameters.jl
index 05a61a9..035e160 100644
--- a/src/parameters.jl
+++ b/src/parameters.jl
@@ -374,6 +374,11 @@ const FLUID_DISCRETIZATIONS = (;
       :p_conformity => :H1,
       :p_order => (k) -> k-1,
     ),
+    :RT => (; # Raviart-Thomas
+      :p_space => :Q,
+      :p_conformity => :L2,
+      :p_order => (k) -> k-1,
+    ),
   ),
   :TET => (; # Tetrahedra
     :Pk_Pkm1 => (; # Taylor Hood
@@ -395,6 +400,21 @@ const FLUID_DISCRETIZATIONS = (;
   )
 )
 
+function get_fluid_reffe_pair(disc::Symbol,poly::Polytope,feparams)
+  if poly == HEX 
+
+    if disc == :Qk_dPkm1
+      
+    else
+
+    end
+  elseif poly == TET
+
+  else
+    @notimplemented "Only HEX and TET supported for now."
+  end
+end
+
 """
     const CURRENT_DISCRETIZATIONS
 
diff --git a/test/seq/channel_tests.jl b/test/seq/channel_tests.jl
index 6a06d30..af7445a 100644
--- a/test/seq/channel_tests.jl
+++ b/test/seq/channel_tests.jl
@@ -15,7 +15,7 @@ solver = Dict(
 channel(
   nc=(4,2,2),
   order = 3,
-  order_j = 4,
+  order_j = 3,
   L = 2.0,
   w = 1.0,
   ζ = 50.0,