From 5178e467b733b7df4893f67ffd9db76064ee8c32 Mon Sep 17 00:00:00 2001
From: Martin Bauer <martin.bauer@fau.de>
Date: Tue, 18 Jun 2019 15:17:59 +0200
Subject: [PATCH] Fix in shear flow initialization (fluctuation now centered
around 0)
---
lbmpy/geometry.py | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/lbmpy/geometry.py b/lbmpy/geometry.py
index e0cec5ae..1012d22c 100644
--- a/lbmpy/geometry.py
+++ b/lbmpy/geometry.py
@@ -185,7 +185,7 @@ def get_shear_flow_velocity_field(domain_size, u_max, random_y_factor=0.01):
velocity[..., 0] = u_max
velocity[..., height // 3: height // 3 * 2, 0] = -u_max
for j in range(1, len(domain_size)):
- velocity[..., j] = random_y_factor * u_max * np.random.rand(*domain_size)
+ velocity[..., j] = random_y_factor * u_max * (np.random.rand(*domain_size) - 0.5)
return velocity
--
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