diff --git a/doc/source/examples/dem/packing-in-ball/packing-in-ball.rst b/doc/source/examples/dem/packing-in-ball/packing-in-ball.rst
index 753869be5c..3da2aa759a 100644
--- a/doc/source/examples/dem/packing-in-ball/packing-in-ball.rst
+++ b/doc/source/examples/dem/packing-in-ball/packing-in-ball.rst
@@ -86,12 +86,12 @@ Gravitational acceleration has three components in three directions.
         set diameter                          = 0.005
         set number of particles               = 5000
         set density particles                 = 2000
-        set young modulus particles           = 10000000
+        set young modulus particles           = 1e7
         set poisson ratio particles           = 0.3
         set restitution coefficient particles = 0.75
         set friction coefficient particles    = 0.3
       end
-      set young modulus wall           = 10000000
+      set young modulus wall           = 1e7
       set poisson ratio wall           = 0.3
       set restitution coefficient wall = 0.75
       set friction coefficient wall    = 0.3
@@ -106,8 +106,8 @@ Model Parameters
     subsection model parameters
       subsection contact detection
         set contact detection method                = dynamic
-        set dynamic contact search size coefficient = 0.7
-        set neighborhood threshold                  = 1.5
+        set dynamic contact search size coefficient = 0.5
+        set neighborhood threshold                  = 1.4
       end
       set particle particle contact force method    = hertz_mindlin_limit_overlap
       set particle wall contact force method        = nonlinear
diff --git a/doc/source/examples/dem/rectangular-hopper/rectangular-hopper.rst b/doc/source/examples/dem/rectangular-hopper/rectangular-hopper.rst
index 1096e97e97..256cca1f34 100644
--- a/doc/source/examples/dem/rectangular-hopper/rectangular-hopper.rst
+++ b/doc/source/examples/dem/rectangular-hopper/rectangular-hopper.rst
@@ -80,12 +80,7 @@ An insertion box is defined inside and the top part of the hopper. The inserted
       set insertion method                               = volume
       set inserted number of particles at each time step = 2910
       set insertion frequency                            = 25000
-      set insertion box minimum x                        = -0.1030
-      set insertion box minimum y                        = 0.10644
-      set insertion box minimum z                        = .00224
-      set insertion box maximum x                        = 0.1030
-      set insertion box maximum y                        = 0.16020
-      set insertion box maximum z                        = 0.03136
+      set insertion box points coordinates               = -0.06, 0.10644, .00224 : 0.06, 0.16020, 0.03136
       set insertion distance threshold                   = 1.5
       set insertion maximum offset                       = 0.1
       set insertion prn seed                             = 20
@@ -168,6 +163,7 @@ The time end of the simulation is 7.5 where most of the particles are discharged
       set output frequency = 1000
       set output path      = ./output/
       set output name      = hopper
+      set output boundaries = true
     end
 
 
@@ -341,10 +337,10 @@ Since the geometry of the mesh and the number of the particles are not the same,
 .. code-block:: text
 
     subsection insertion info
-        set insertion method                               = non_uniform
-        set inserted number of particles at each time step = 2910
+        set insertion method                               = volume
+        set inserted number of particles at each time step = 485
         set insertion frequency                            = 25000
-        set insertion box points coordinates               = -0.1030, 0.10644, 0.00224 : 0.1030,0.16020, 0.03136
+        set insertion box points coordinates               = -0.06, 0.10644, .00112 : 0.06, 0.16020, 0.00448
         set insertion distance threshold                   = 1.5
         set insertion maximum offset                       = 0.1
         set insertion prn seed                             = 20
diff --git a/examples/dem/3d-packing-in-ball/packing-in-ball.prm b/examples/dem/3d-packing-in-ball/packing-in-ball.prm
index e22997ef4b..cd3ef5d94d 100644
--- a/examples/dem/3d-packing-in-ball/packing-in-ball.prm
+++ b/examples/dem/3d-packing-in-ball/packing-in-ball.prm
@@ -44,12 +44,12 @@ subsection lagrangian physical properties
     set diameter                          = 0.005
     set number of particles               = 5000
     set density particles                 = 2000
-    set young modulus particles           = 10000000
+    set young modulus particles           = 1e7
     set poisson ratio particles           = 0.3
     set restitution coefficient particles = 0.75
     set friction coefficient particles    = 0.3
   end
-  set young modulus wall           = 10000000
+  set young modulus wall           = 1e7
   set poisson ratio wall           = 0.3
   set restitution coefficient wall = 0.75
   set friction coefficient wall    = 0.3