First commit of code.

New functionality:
- DSMC module:
  - 2D cyl geometry
    - GMSH file format
    - Elastic cross-section for Argon-Argon collisions.
    - Basic boundary conditions: reflection, absorption and axis
      symmetry.

Bugs fixed:

Other comments:
- Still searching for name.

src/modules/moduleMeshCylBoundary.f95

@@ -0,0 +1,80 @@
+!moduleMeshCylBoundary: Edge elements for Cylindrical mesh.
+MODULE moduleMeshCylBoundary
+  USE moduleMeshCyl
+
+  TYPE, PUBLIC, EXTENDS(meshEdgeCyl):: meshEdgeCylRef
+    CONTAINS
+      PROCEDURE, PASS:: fBoundary => reflection
+
+  END TYPE meshEdgeCylRef
+
+  TYPE, PUBLIC, EXTENDS(meshEdgeCyl):: meshEdgeCylAbs
+    CONTAINS
+      PROCEDURE, PASS:: fBoundary => absorption
+
+  END TYPE meshEdgeCylAbs
+
+  TYPE, PUBLIC, EXTENDS(meshEdgeCyl):: meshEdgeCylAxis
+    CONTAINS
+      PROCEDURE, PASS:: fBoundary => symmetryAxis
+
+  END TYPE meshEdgeCylAxis
+
+  CONTAINS
+    SUBROUTINE reflection(self, part)
+      USE moduleSpecies
+      IMPLICIT NONE
+
+      CLASS(meshEdgeCylRef), INTENT(inout):: self
+      CLASS(particle), INTENT(inout):: part
+      REAL(8):: edgeNorm, cosT, sinT, rp(1:2), rpp(1:2), vpp(1:2)
+
+      edgeNorm = DSQRT((self%r(2)-self%r(1))**2 + (self%z(2)-self%z(1))**2)
+      cosT = (self%z(2)-self%z(1))/edgeNorm
+      sinT = DSQRT(1-cosT**2)
+
+      rp(1) = part%r(1) - self%z(1);
+      rp(2) = part%r(2) - self%r(1);
+
+      rpp(1) = cosT*rp(1) - sinT*rp(2)
+      rpp(2) = sinT*rp(1) + cosT*rp(2)
+      rpp(2) = -rpp(2)
+
+      vpp(1) = cosT*part%v(1) - sinT*part%v(2)
+      vpp(2) = sinT*part%v(1) + cosT*part%v(2)
+      vpp(2) = -vpp(2)
+
+      part%r(1) =  cosT*rpp(1) + sinT*rpp(2) + self%z(1);
+      part%r(2) = -sinT*rpp(1) + cosT*rpp(2) + self%r(1);
+      part%v(1) =  cosT*vpp(1) + sinT*vpp(2)
+      part%v(2) = -sinT*vpp(1) + cosT*vpp(2)
+
+    END SUBROUTINE reflection
+
+    !Absoption in a surface
+    SUBROUTINE absorption(self, part)
+      USE moduleSpecies
+      IMPLICIT NONE
+
+      CLASS(meshEdgeCylAbs), INTENT(inout):: self
+      CLASS(particle), INTENT(inout):: part
+
+
+      !TODO: Add scatter to mesh nodes
+      part%n_in = .FALSE.
+
+    END SUBROUTINE absorption
+
+    SUBROUTINE symmetryAxis(self, part)
+      USE moduleSpecies
+      IMPLICIT NONE
+
+      CLASS(meshEdgeCylAxis), INTENT(inout):: self
+      CLASS(particle), INTENT(inout):: part
+
+      !Do to the 2D Cyl pusher, this function should never be called.
+
+    END SUBROUTINE symmetryAxis
+
+
+END MODULE moduleMeshCylBoundary