From 5208f4ea967212178a8524a531cf2329fcb33318 Mon Sep 17 00:00:00 2001
From: Revathi  Jambunathan
 <41089244+RevathiJambunathan@users.noreply.github.com>
Date: Wed, 19 May 2021 13:32:08 -0700
Subject: Set guard cells for allocation using field solver stencil and
 particle shape factor (#1969)

---
 .../FiniteDifferenceAlgorithms/CartesianCKCAlgorithm.H            | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'Source/FieldSolver/FiniteDifferenceSolver/FiniteDifferenceAlgorithms/CartesianCKCAlgorithm.H')

diff --git a/Source/FieldSolver/FiniteDifferenceSolver/FiniteDifferenceAlgorithms/CartesianCKCAlgorithm.H b/Source/FieldSolver/FiniteDifferenceSolver/FiniteDifferenceAlgorithms/CartesianCKCAlgorithm.H
index fd63a44a7..da1a8c9a9 100644
--- a/Source/FieldSolver/FiniteDifferenceSolver/FiniteDifferenceAlgorithms/CartesianCKCAlgorithm.H
+++ b/Source/FieldSolver/FiniteDifferenceSolver/FiniteDifferenceAlgorithms/CartesianCKCAlgorithm.H
@@ -108,6 +108,14 @@ struct CartesianCKCAlgorithm {
         return delta_t;
     }
 
+    /**
+     * \brief Returns maximum number of guard cells required by the field-solve
+     */
+    static amrex::IntVect GetMaxGuardCell () {
+        // The ckc solver requires one guard cell in each dimension
+        return (amrex::IntVect(AMREX_D_DECL(1,1,1)));
+    }
+
     /**
      * Perform derivative along x on a cell-centered grid, from a nodal field `F` */
     AMREX_GPU_HOST_DEVICE AMREX_FORCE_INLINE
-- 
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