Fix output frequency of Solid

Output frequency of heat.py must match frequency of OpenFOAM Fluid case.
Compare writeInterval in controlDict (https://github.com/precice/openfoam-adapter/blob/develop/tutorials/CHT/flow-over-plate/buoyantPimpleFoam-laplacianFoam/Fluid/system/controlDict).

Author: BenjaminRodenberg

CHT/flow-over-plate/buoyantPimpleFoam-fenics/Solid/heat.py

@@ -181,7 +181,7 @@ def fluxes_from_temperature_full_domain(f, v_vec, k):
         n += 1
 
     if precice.is_time_window_complete():
-        # if abs(t % dt_out) < 10e-5:  # output if t is a multiple of dt_out
+        if abs(float(t) % dt_out) < 10e-5:  # output if t is a multiple of dt_out
             file_out << u_n
 
     # Update dirichlet BC