From 56396aaaa4250d67188e15374af87368aaaff9e4 Mon Sep 17 00:00:00 2001
From: Ben Wilfong <48168887+wilfonba@users.noreply.github.com>
Date: Wed, 5 Nov 2025 12:03:06 -0500
Subject: [PATCH] cfl dt bug fix

---
 src/simulation/m_sim_helpers.fpp | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/simulation/m_sim_helpers.fpp b/src/simulation/m_sim_helpers.fpp
index 8008225e54..13d14a64f7 100644
--- a/src/simulation/m_sim_helpers.fpp
+++ b/src/simulation/m_sim_helpers.fpp
@@ -271,17 +271,17 @@ contains
                 if (grid_geometry == 3) then
                     fltr_dtheta = f_compute_filtered_dtheta(k, l)
                     vcfl_dt = cfl_target*(min(dx(j), dy(k), fltr_dtheta)**2._wp) &
-                              /minval(1/(rho*Re_l))
+                              /maxval(1/(rho*Re_l))
                 else
                     vcfl_dt = cfl_target*(min(dx(j), dy(k), dz(l))**2._wp) &
-                              /minval(1/(rho*Re_l))
+                              /maxval(1/(rho*Re_l))
                 end if
             elseif (n > 0) then
                 !2D
                 vcfl_dt = cfl_target*(min(dx(j), dy(k))**2._wp)/maxval((1/Re_l)/rho)
             else
                 !1D
-                vcfl_dt = cfl_target*(dx(j)**2._wp)/minval(1/(rho*Re_l))
+                vcfl_dt = cfl_target*(dx(j)**2._wp)/maxval(1/(rho*Re_l))
             end if
         end if