Fix smagorinsky

lbmpy/creationfunctions.py

@@ -638,14 +638,14 @@ class LBMConfig:
     entropic_newton_iterations: int = None
     omega_output_field: Field = None
     smagorinsky: bool = False
-    fluctuating: bool = False
+    fluctuating: dict = False
     temperature: Any = None
 
     output: dict = field(default_factory=dict)
     velocity_input: Field = None
     density_input: Field = None
 
-    kernel_type: str = 'default_stream_collide'
+    kernel_type: Union[str, PdfFieldAccessor] = 'default_stream_collide'
     streaming_pattern: str = 'pull'
     timestep: lbmpy.advanced_streaming.Timestep = Timestep.BOTH
 

lbmpy/turbulence_models.py

@@ -44,8 +44,9 @@ def add_smagorinsky_model(collision_rule, smagorinsky_constant, omega_output_fie
     method = collision_rule.method
     omega_s = get_shear_relaxation_rate(method)
 
-    found_symbolic_shear_relaxation = False
+    found_symbolic_shear_relaxation = True
     if isinstance(omega_s, float) or isinstance(omega_s, int):
+        found_symbolic_shear_relaxation = False
         for eq in collision_rule.all_assignments:
             if eq.rhs == omega_s:
                 found_symbolic_shear_relaxation = True

lbmpy_tests/test_smagorinsky.py

+import sympy as sp
+from pystencils.simp.subexpression_insertion import insert_constants
+
+from lbmpy import create_lb_collision_rule, LBMConfig, LBStencil, Stencil, Method
+
+
+def test_smagorinsky_with_constant_omega():
+    stencil = LBStencil(Stencil.D2Q9)
+
+    config = LBMConfig(stencil=stencil, method=Method.SRT, smagorinsky=True, relaxation_rate=sp.Symbol("omega"))
+    collision_rule = create_lb_collision_rule(lbm_config=config)
+
+    config = LBMConfig(stencil=stencil, method=Method.SRT, smagorinsky=True, relaxation_rate=1.5)
+    collision_rule2 = create_lb_collision_rule(lbm_config=config)
+
+    collision_rule = collision_rule.subs({sp.Symbol("omega"): 1.5})
+    collision_rule = insert_constants(collision_rule)
+
+    assert collision_rule == collision_rule2
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