From 31679117a4e0cab6e46cf8f49ad2a5e3552ad4a7 Mon Sep 17 00:00:00 2001
From: Chris Greenshields <https://cfd.direct>
Date: Wed, 19 Jul 2023 11:31:05 +0100
Subject: [PATCH] snappyHexMeshConfig: write addLayersControls sub-dictionary
 always

---
 .../snappyHexMeshConfig/snappyHexMeshConfiguration.C        | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/applications/utilities/preProcessing/snappyHexMeshConfig/snappyHexMeshConfiguration.C b/applications/utilities/preProcessing/snappyHexMeshConfig/snappyHexMeshConfiguration.C
index 3312bd7e81..ba1a888e60 100644
--- a/applications/utilities/preProcessing/snappyHexMeshConfig/snappyHexMeshConfiguration.C
+++ b/applications/utilities/preProcessing/snappyHexMeshConfig/snappyHexMeshConfiguration.C
@@ -432,10 +432,8 @@ void Foam::snappyHexMeshConfiguration::writeSnapControls()
 
 void Foam::snappyHexMeshConfiguration::writeAddLayersControls()
 {
-    if (layers_ == 0)
-    {
-        return;
-    }
+    // Include addLayersControls sub-dict with zero layers when layers are
+    // switched off, so they can be conveniently switched on later.
 
     beginDict(os_, "addLayersControls");