add a derived variable for gradP_over_P (#2877)

this will help understand the shock flag
AMReX-Astro · Jun 21, 2024 · 50b3621 · 50b3621
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commit 50b3621
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diff --git a/Exec/science/subch_planar/Problem_Derive.H b/Exec/science/subch_planar/Problem_Derive.H
@@ -0,0 +1,10 @@
+
+void ca_dergradpoverp
+  (const amrex::Box& bx, amrex::FArrayBox& derfab, int dcomp, int /*ncomp*/,
+   const amrex::FArrayBox& datfab, const amrex::Geometry& geomdata,
+   amrex::Real /*time*/, const int* /*bcrec*/, int /*level*/);
+
+void ca_dergradpoverp1
+  (const amrex::Box& bx, amrex::FArrayBox& derfab, int dcomp, int /*ncomp*/,
+   const amrex::FArrayBox& datfab, const amrex::Geometry& geomdata,
+   amrex::Real /*time*/, const int* /*bcrec*/, int /*level*/);