流固耦合问题

*** WARNING *** CODE ADF6033:
Absolute residual 1.98E+21 of velocity is too large.
*** WARNING *** CODE ADF6033:
Absolute residual 2.90E+23 of pressure is too large.
*** WARNING *** CODE ADF6033:
Absolute residual 1.33E+24 of temperature is too large.
*** WARNING *** CODE ADF6033:
Absolute residual 1.31E+46 of velocity is too large.
*** WARNING *** CODE ADF6033:
Absolute residual 9.12E+51 of pressure is too large.
*** WARNING *** CODE ADF6033:
Absolute residual 1.51E+51 of temperature is too large.
*** WARNING *** CODE ADF6064:
Fluid model could be wrong! The factorized diagonal 0.0000E+00 of
equation 6567 is too small.
A constant pivot has been assigned to this equation.
*** WARNING *** CODE ADF6064:
Fluid model could be wrong! The factorized diagonal 0.0000E+00 of
equation 6531 is too small.
A constant pivot has been assigned to this equation.
*** WARNING *** CODE ADF6064:
Fluid model could be wrong! The factorized diagonal 0.0000E+00 of
equation 6511 is too small.
A constant pivot has been assigned to this equation.
*** WARNING *** CODE ADF6064:
Fluid model could be wrong! The factorized diagonal 0.0000E+00 of
equation 6138 is too small.
A constant pivot has been assigned to this equation.
*** WARNING *** CODE ADF6065:
Fluid model could be unstable! The factorized diagonal NaN of
equation 6133 is too small.
*** WARNING *** CODE ADF6065:
Fluid model could be unstable! The factorized diagonal NaN of
equation 6512 is too small.
*** WARNING *** CODE ADF6065:
Fluid model could be unstable! The factorized diagonal NaN of
equation 6530 is too small.
*** WARNING *** CODE ADF6065:
Fluid model could be unstable! The factorized diagonal NaN of
equation 6535 is too small.
*** WARNING *** CODE ADF6065:
Fluid model could be unstable! The factorized diagonal NaN of
equation 6589 is too small.
*** WARNING *** CODE ADF6065:
Fluid model could be unstable! The factorized diagonal NaN of
equation 6590 is too small.
*** WARNING *** CODE ADF6065:
Fluid model could be unstable! The factorized diagonal NaN of
equation 6494 is too small.
*** WARNING *** CODE ADF6065:
Fluid model could be unstable! The factorized diagonal NaN of
equation 6499 is too small.
*** WARNING *** CODE ADF6065:
Fluid model could be unstable! The factorized diagonal NaN of
equation 6517 is too small.
Too many error/warning messages for code number ADF6065 have been
encountered.
*** WARNING *** CODE ADF6064:
Fluid model could be wrong! The factorized diagonal 0.0000E+00 of
equation 1108 is too small.
A constant pivot has been assigned to this equation.
*** WARNING *** CODE ADF6064:
Fluid model could be wrong! The factorized diagonal 0.0000E+00 of
equation 1113 is too small.
A constant pivot has been assigned to this equation.
*** ERROR *** CODE ADF2005:
Iteration limit is reached without convergence.
Equilibrium is not established from time: 0.00000E+00
to time: 1.00000E-05
Here are some suggestions for improving convergence:
* Resolve all error/warning messages.
* Use proper units to avoid machine round-off errors.
* Apply a proper force or displacement relaxation factor in
fluid-structure interaction analyses.
* Use a proper CFL number in automatic time stepping method.
* In transient analyses, use smaller time steps.
* In steady-state analyses, incrementally apply loads (prescribed
velocities, normal-tractions, etc.) step-by-step, or/and use
time-dependent materials, starting with easier material values and
eventually approaching to the real values.
* In transient analyses of fluid-structure interactions, a good initial
condition of fluid variable is crucial. One can achieve that by
using a very large fictitious first time step, which provides a good
initial condition for the really transient analyses starting at
second time step. One can also achieve that by using a restart run,
in which the (steady-state) result of first run provides initial
conditions for the (transient) analysis in the second run.
*** ERROR *** CODE ADF3044:
Unsuccessful in fluid model for fluid-structure interaction. Last status
in fluid model is "COMPUTE ".