Confirmation of a parameter of a standard case FSI3

[zhangmuElias]

Dear everyone,

I just found that there may be something confused me for the material settings of the benchmark case FSI3 in the case file TF_fsi.py The first lame coefficient is set to be 4e6 but it may should be 8e6 from the paper.

        # Physical constants ('FSI 3')
        Um=2.0,                       # Max. velocity inlet, CDF3: 2.0 [m/s]
        rho_f=1.0e3,                  # Fluid density [kg/m3]
        mu_f=1.0,                     # Fluid dynamic viscosity [Pa.s]
        rho_s=1.0e3,                  # Solid density[kg/m3]
        nu_s=0.4,                     # Solid Poisson ratio [-]
        mu_s=2.0e6,                   # Shear modulus, CSM3: 0.5E6 [Pa]
        lambda_s=4e6,                 # Solid 1st Lame Coefficient [Pa]

Although the differences between 4e6 and 8e6 of first lame coefficient to calculate Elastic modulus is not too big, which are 5.333e6 and 5.6e6 pa.

Best regards Zhang

[keiyamamo]

Hi @zhangmuElias

Thank you for reporting this! Your calculation seems right to me and the first lame coefficient should be updated. Also I agree with you that the difference in the Elastic modulus is relatively small.

Best,

[zhangmuElias]

Dear @keiyamamo

Good to hear it, and thanks for replying!

Best wishes ZHANG