diff --git a/python/ibmppp/ibmppp.py b/python/ibmppp/ibmppp.py
index b50f5b5..5d8f090 100644
--- a/python/ibmppp/ibmppp.py
+++ b/python/ibmppp/ibmppp.py
@@ -7,14 +7,13 @@ import os
 
 class ibmppp:
     """Parallel Python Postprocessor for the IBM-DNS code"""
-    def __init__(self,comm,dir_base,iseq,flowType,chunksPerProc=(1,1,1),numberOfGhosts=(1,1,1)):
+    def __init__(self,comm,dir_base,flowType,chunksPerProc=(1,1,1),numberOfGhosts=(1,1,1)):
         """Class constructor"""
         # Save method arguments for later use
         self.__comm = comm
         self.__rank = comm.Get_rank()
         self.__nproc = comm.Get_size()
         self.__dir_base = dir_base
-        self.__iseq = iseq
         self.__nxppp = chunksPerProc[0]
         self.__nyppp = chunksPerProc[1]
         self.__nzppp = chunksPerProc[2]
@@ -88,7 +87,7 @@ class ibmppp:
         '''Read input processor grid, compute processor grid for workers'''
         if self.__rank==0:
             # Read the processor grid
-            file_proc = self.__dir_base+'/proc_{:04d}.bin'.format(self.__iseq)
+            file_proc = self.__dir_base+'/proc.bin'
             (self.__procGrid1['u'][0], self.__procGrid1['u'][1], self.__procGrid1['u'][2], self.__procGrid1['u'][3], self.__procGrid1['u'][4], self.__procGrid1['u'][5],
              self.__procGrid1['v'][0], self.__procGrid1['v'][1], self.__procGrid1['v'][2], self.__procGrid1['v'][3], self.__procGrid1['v'][4], self.__procGrid1['v'][5],
              self.__procGrid1['w'][0], self.__procGrid1['w'][1], self.__procGrid1['w'][2], self.__procGrid1['w'][3], self.__procGrid1['w'][4], self.__procGrid1['w'][5],
@@ -153,7 +152,7 @@ class ibmppp:
         buffer = None
         if self.__rank==0:
             # Read the grid
-            file_grid = self.__dir_base+'/grid_{:04d}.bin'.format(self.__iseq)
+            file_grid = self.__dir_base+'/grid.bin'
             buffer = ucf.readGrid(file_grid)
         # Broadcast the data
         buffer = self.__comm.bcast(buffer,root=0)
@@ -204,7 +203,7 @@ class ibmppp:
         # There is No need to distinguish between master and slave particles here, since we will
         # only use them for masking the fields. Also we do not care about particles in ghost cells.
         if self.__rank==0:
-          file_input = self.__dir_base+'particles_{:04d}.bin'.format(self.__iseq)
+          file_input = self.__dir_base+'particles.bin'
           pp,col = ucf.readParticles(file_input,step=1)
           # Remove time dimension, because we are dealing with a single time step exclusively
           pp = pp[:,:,0]
@@ -252,13 +251,15 @@ class ibmppp:
                 sendbuf = (np.ascontiguousarray(pp[:,li_part]),col)
                 self.__mpireq.append(self.__comm.isend(sendbuf,dest=rank_dst))
         # Every rank needs to receive the particles, rank 0 send them to itself
-        req = self.__comm.irecv(source=0)
+        buffsize = 32*1024*1024
+        req = self.__comm.irecv(buffsize,source=0)
         (self.particles,self.col) = req.wait()
         if self.__rank==0:
           # Wait for everyone to finish
           MPI.Request.waitall(self.__mpireq)
           # Communication is done! Clear the list of requests
           self.__mpireq.clear()
+        self.__comm.Barrier()
 
     def loadField(self,key,dtype='float64'):
         '''Reads chunks from files'''
@@ -275,19 +276,19 @@ class ibmppp:
         # Also determine file which contains the desired field as well as the
         # dataset ID
         if key[0]=='u':
-          filebase = self.__dir_base+'uvwp_{:04d}.'.format(self.__iseq)
+          filebase = self.__dir_base+'uvwp.'
           dset = 1
         elif key[0]=='v':
-          filebase = self.__dir_base+'uvwp_{:04d}.'.format(self.__iseq)
+          filebase = self.__dir_base+'uvwp.'
           dset = 2
         elif key[0]=='w':
-          filebase = self.__dir_base+'uvwp_{:04d}.'.format(self.__iseq)
+          filebase = self.__dir_base+'uvwp.'
           dset = 3
         elif key[0]=='p':
-          filebase = self.__dir_base+'uvwp_{:04d}.'.format(self.__iseq)
+          filebase = self.__dir_base+'uvwp.'
           dset = 4
         elif key[0]=='s':
-          filebase = self.__dir_base+'scal_{:04d}.'.format(self.__iseq)
+          filebase = self.__dir_base+'scal.'
           dset = int(key[1])
           if dset!=1:
             self.fields[key] = None
@@ -860,7 +861,7 @@ class ibmppp:
         stencil[ii] = 2*int(truncate*sigma[ii]+0.5)+1
       if self.__nghx<stencil[0] or self.__nghx<stencil[1] or self.__nghx<stencil[2]:
         raise ValueError('Too few ghost cells for stencil: ',stencil,(self.__nghx,self.__nghy,self.__nghz))
-      print(stencil)
+      #print(stencil)
       # Run scipy gaussian filter
       self.field[key] = ndimage.gaussian_filter(self.field[key],sigma,truncate=truncate,mode='constant',cval=0.0)
       # Exchange ghost cells and set boundary conditions
@@ -1083,6 +1084,7 @@ class ibmppp:
       self.__communicateGhostCells(key,(+1,+1,+1)) # right,up,back
       # Wait for communication to finish
       MPI.Request.waitall(self.__mpireq)
+      self.__comm.Barrier()
       # Communication is done! Clear the list of requests
       self.__mpireq.clear()
       # Assign buffer to array
@@ -1468,4 +1470,14 @@ class ibmppp:
         symm = np.multiply(symm1,symm2)
       else:
         raise ValueError('Invalid operation: ',operation)
-      return symm
\ No newline at end of file
+      return symm
+
+# Utility functions
+def gaussianFilterStencilWidth(sigma=(1,1,1),truncate=4.0):
+  if len(sigma)!=3:
+        raise ValueError('Expected one value of sigma for each direction, but only got {}.'.format(len(sigma)))
+  # Compute stencil width 
+  stencil = [0,0,0]
+  for ii in range(0,3):
+    stencil[ii] = 2*int(truncate*sigma[ii]+0.5)+1
+  return stencil