[dnwnlife0109]

Hi. I'm currently trying to use membrane FSI for diaphragm deflection. However when I start the simulation, solver stops during initialization process with no explicit error message in converge.log.

Segmentation fault 11 error is on the log and before error "Initializing Membrane 0 with MMT solver" is written.



The file below is fsi.in file I'm currently using.

Membrane_1 is a interface boundary with high pressure region and low pressure region on other sides.



Thank you in advance.



membrane_objects:
- object:
object_id: Membrane_1 # Object name.
boundary_ids: [3] # Boundary IDs that make up the membrane.
thickness: 0.004 # Membrane thickness (m).
density: 2700 # Density of the membrane (kg/m^3).
youngs_modulus: 70000000000 # Young's modulus of membrane (N/m^2).
poissons_ratio: 0.33 # Poisson's ratio.
c_k: 0 # (s) Damping coefficient [C]=c_k*[K] +c_m*[M].
c_m: 0 # (s^-1).
stress_limit: 200000000000 # Maximum fluid stress that is passed to the membrane (N/m^2).
shear_correction_factor: 0.833
reference_pressure: 100000 # Reference pressure (Pa).
contact_model: 1 # 0=No contact, 1=Contact with planes specified by constraints listed below.
constraint_bound_ids: [2]
membrane_settings:
padding: 1e-06
coefficient_of_restitution: 0.0
membrane_time_step : 1e-06