diff --git a/bird/meshing/_mesh_tools.py b/bird/meshing/_mesh_tools.py
index 61618b2f..57b3b158 100644
--- a/bird/meshing/_mesh_tools.py
+++ b/bird/meshing/_mesh_tools.py
@@ -32,6 +32,35 @@ def make_walls_from_topo(topo):
     return {"WallR": WallR, "WallL": WallL}
 
 
+def make_fluid_blocks_from_corner(corners):
+    assert isinstance(corners, list)
+    fluid_blocks = []
+    for multi_block in corners:
+        n_end_block = len(multi_block)
+        for iend, end_block in enumerate(multi_block):
+
+            if iend == 0:
+                fluid_blocks.append(list(end_block))
+            else:
+                # Find direction to previous end point
+                prev_block=multi_block[iend-1]
+                line=np.array(end_block, dtype=int) - np.array(prev_block, dtype=int)
+                nnz = np.nonzero(line)
+                assert len(nnz) == 1
+                direction = np.array(line / np.linalg.norm(line), dtype=int)
+                blocks_line = []
+                found_next = False
+                count = 0
+                while not found_next:
+                    count += int(1)
+                    new_block = np.array(prev_block, dtype=int) + count*direction
+                    if np.linalg.norm(new_block - np.array(end_block, dtype=int))<1:
+                        found_next = True
+                    blocks_line.append(list(np.array(prev_block, dtype=int) + count*direction))
+                fluid_blocks += blocks_line
+
+    return fluid_blocks
+
 def make_bound_from_topo(topo):
     BoundaryNames = []
     BoundaryType = []