Dead zones during Fluent Watertight Meshing

[Lumko]

Good day, 

I am trying to model the flow of water that is pumped out of a tank by a submersible pump through a direct coupled discharge pipe.  

When trying to generate the surface mesh, Fluent splits the discharge pipe, and the fluid zone in the pipe, into three domains that are dead zones. I am not sure why it does this. Could you kindly advise on its cause and solution?

 

------------------------- --------------------- -------------------- ---------------- ----------

                     name skewed-cells (> 0.80)    averaged-skewness maximum-skewness face count

------------------------- --------------------- -------------------- ---------------- ----------

 

              outlet_pipe                     0           0.01494663       0.49299298      53250

               sump_fluid                     0          0.014004151       0.79789778      55244

             dead1-outlet                     0          0.014314581       0.49299298      27304

      dead2-pipe_exterior                     0          0.018713448       0.79789778      35734

       dead0-sump_fluid:1                     0          0.017121627       0.42576109      19758

                pump_flow                     0          0.014564433       0.48229695      17618

                     pump                     0           0.01100951       0.48229695      40504

------------------------- --------------------- -------------------- ---------------- ----------

                     name skewed-cells (> 0.80)    averaged-skewness maximum-skewness face count

------------------------- --------------------- -------------------- ---------------- ----------

 

                      fff                     0          0.014714286       0.79789778     144896

 

---------------- After Surface mesh, the model consists of 4 fluid/solid regions and 3 voids.

 

---------------- Surface Meshing of FFF complete in  0.84 minutes, with a maximum skewness of  0.80. 

 

 

---- Warning--- During Surface mesh, failed faces were identified and automatically repaired.

 

Thanks and regards,

Lumko