From bd67bd6606a50a805fb34c1d312b7625f41c7813 Mon Sep 17 00:00:00 2001
From: JGonzalez <jorge.gonzalez@upm.es>
Date: Thu, 16 Apr 2026 09:26:35 +0200
Subject: [PATCH] Skeleton of new free current BC

---
 src/modules/mesh/moduleMesh.f90 | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/src/modules/mesh/moduleMesh.f90 b/src/modules/mesh/moduleMesh.f90
index 5fc6f2e..685a1ba 100644
--- a/src/modules/mesh/moduleMesh.f90
+++ b/src/modules/mesh/moduleMesh.f90
@@ -1113,6 +1113,31 @@ MODULE moduleMesh
 
   end interface
 
+  ! Calculates the electric field normal to the surface based on Ampere's law (without magnetic field)
+  type, extends(boundaryEMGeneric):: boundaryEMFreeCurrent
+    type(meshEdgePointer), allocatable:: electricField(:) ! Electric field in each edge
+    contains
+      procedure, pass:: apply => applyFreeCurrent
+
+  end type boundaryEMFreeCurrent
+
+  interface
+    module subroutine initFreeCurrent(self, config, object)
+      use json_module
+
+      class(boundaryEMGeneric), allocatable, intent(inout):: self
+      type(json_file), intent(inout):: config
+      character(:), allocatable, intent(in):: object
+
+    end subroutine initFreeCurrent
+
+    module subroutine applyFreeCurrent(self, vectorF)
+      class(boundaryEMFreeCurrent), intent(in):: self
+      real(8), intent(inout):: vectorF(:)
+
+    end subroutine applyFreeCurrent
+
+  end interface
   ! Container for boundary conditions
   TYPE:: boundaryEMCont
     CLASS(boundaryEMGeneric), ALLOCATABLE:: obj