[kkpal]

Dear all,
In the simulation of vortex induced vibration of a flexibly mounted rigid circular cylinder, I modified the case from the wingMotion tutorial and tried to change the ddtScheme from Euler, which is first order accuracy, to backward, which is second order one. The case with Euler went well, however, with backward scheme the computation diverged very quickly!

With a fixed cylinder simulation where there is no mesh deformation, both euler and backward worked well.

Have someone else encountered this problem?