From e761498d7a24071bf9c4cd938411582546f9b4f0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Felix=20K=C3=B6hler?=
 <27728103+Ceyron@users.noreply.github.com>
Date: Tue, 22 Oct 2024 14:46:19 +0200
Subject: [PATCH] Ensure single-channel convection nonlin is conservative (#53)

---
 exponax/nonlin_fun/_general_nonlinear.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/exponax/nonlin_fun/_general_nonlinear.py b/exponax/nonlin_fun/_general_nonlinear.py
index 8b09cb9..8104dc1 100644
--- a/exponax/nonlin_fun/_general_nonlinear.py
+++ b/exponax/nonlin_fun/_general_nonlinear.py
@@ -89,6 +89,8 @@ def __init__(
             # Minus required because it internally has another minus
             scale=-scale_list[1],
             single_channel=True,
+            # For legacy reasons, the single-channel convection term is conservative
+            conservative=True,
         )
         self.gradient_norm_nonlinear_fun = GradientNormNonlinearFun(
             num_spatial_dims,