Dual case mesh finally working

runs/cylFlow/output/dual/inputDualMesh.json

@@ -0,0 +1,62 @@
+{
+  "output": {
+    "path": "./runs/cylFlow/",
+	"triggerOutput": 10,
+	"cpuTime": true,
+	"numColl": true
+  },
+  "geometry": {
+    "dimension": 2,
+    "type":     "Cyl",
+    "meshType": "vtu",
+    "meshFile": "mesh.vtu",
+    "meshCollisions": "meshColl.vtu"
+  },
+  "species": [
+    {"name": "Argon",  "type": "neutral", "mass": 6.633e-26, "weight": 5.0e8}
+  ],
+  "boundaries": { 
+    "particles": [
+      {"name": "Transparent", "type": "transparent"},
+      {"name": "Reflection",  "type": "reflection"},
+      {"name": "Axis",        "type": "axis"}
+    ],
+  },
+  "physicalSurfaces": [
+    {"index": 1, "particles":["Transparent"]},
+    {"index": 2, "particles":["Reflection"]},
+    {"index": 3, "particles":["Transparent"]},
+    {"index": 4, "particles":["Reflection"]},
+    {"index": 5, "particles":["Axis"]},
+  ],
+  "inject": [
+    {"name": "Nozzle", "species": "Argon", "flow": 10.0, "units": "sccm",     "v": 300.0, "T": [300.0, 300.0, 300.0],
+                       "velDist": ["Maxwellian", "Maxwellian", "Maxwellian"], "n": [1, 0, 0], "physicalSurface": 1}
+  ],
+  "reference": {
+    "density": 1.0e20,
+    "mass": 6.633e-26,
+    "temperature": 300.0,
+    "radius": 1.88e-10
+  },
+  "solver": {
+    "tau":  [5.0e-7],
+    "finalTime":  5.0e-4,
+    "pusher": ["Neutral"],
+    "WeightingScheme": "Volume"
+  },
+  "interactions": {
+    "folderCollisions": "./data/collisions/",
+    "collisions": [
+      {"species_i": "Argon", "species_j": "Argon", 
+       "cTypes": [
+         {"type": "elastic", "crossSection": "EL_Ar-Ar.dat"}
+       ]}
+    ]
+  },
+  "parallel": {
+    "OpenMP":{
+      "nThreads": 24
+    }
+  }
+}